The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux     component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2     upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number     of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files     on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot     restrictions. This issue affects GRUB2 version 2.04 and prior versions. (CVE-2020-15707)

Note that Nessus relies on the presence of the package as reported by the vendor.

The remote MiracleLinux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2020-250:01 advisory.

    * grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process (CVE-2020-10713)
      * grub2: grub_malloc does not validate allocation size allowing for arithmetic overflow and subsequent     heap-based buffer overflow (CVE-2020-14308)
      * grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow     (CVE-2020-14309)
      * grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow (CVE-2020-14310)
      * grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow (CVE-2020-14311)
      * grub2: Fail kernel validation without shim protocol (CVE-2020-15705)
      * grub2: Use-after-free redefining a function whilst the same function is already executing     (CVE-2020-15706)
      * grub2: Integer overflow in initrd size handling (CVE-2020-15707)     CVE-2020-10713
    ** RESERVED ** This candidate has been reserved by an organization or individual that will use it when     announcing a new security problem. When the candidate has been publicized, the details for this candidate     will be provided.
    CVE-2020-14308     In grub2 versions before 2.06 the grub memory allocator doesn't check for possible arithmetic overflows on     the requested allocation size. This leads the function to return invalid memory allocations which can be     further used to cause possible integrity, confidentiality and availability impacts during the boot     process.
    CVE-2020-14309
    ** RESERVED ** This candidate has been reserved by an organization or individual that will use it when     announcing a new security problem. When the candidate has been publicized, the details for this candidate     will be provided.
    CVE-2020-14310
    ** RESERVED ** This candidate has been reserved by an organization or individual that will use it when     announcing a new security problem. When the candidate has been publicized, the details for this candidate     will be provided.
    CVE-2020-14311
    ** RESERVED ** This candidate has been reserved by an organization or individual that will use it when     announcing a new security problem. When the candidate has been publicized, the details for this candidate     will be provided.
    CVE-2020-15705     GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be     bypassed. This only affects systems where the kernel signing certificate has been imported directly into     the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects     GRUB2 version 2.04 and prior versions.
    CVE-2020-15706     GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability     which can be triggered by redefining a function whilst the same function is already executing, leading to     arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and     prior versions.
    CVE-2020-15707     Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux     component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2     upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number     of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files     on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot     restrictions. This issue affects GRUB2 version 2.04 and prior versions.

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Windows host is missing an update to the Secure Boot DBX. It is, therefore, affected by multiple vulnerabilities:

  - A flaw was found in grub2 in versions prior to 2.06. The rmmod implementation allows     the unloading of a module used as a dependency without checking if any other dependent     module is still loaded leading to a use-after-free scenario. This could allow arbitrary     code to be executed or a bypass of Secure Boot protections. The highest threat from this     vulnerability is to data confidentiality and integrity as well as system availability.
    (CVE-2020-25632)

  - A flaw was found in grub2 in versions prior to 2.06. Setparam_prefix() in the menu     rendering code performs a length calculation on the assumption that expressing a quoted     single quote will require 3 characters, while it actually requires 4 characters which     allows an attacker to corrupt memory by one byte for each quote in the input. The     highest threat from this vulnerability is to data confidentiality and integrity as     well as system availability. (CVE-2021-20233)


Additionally, the host is affected by several other security feature bypasses in Secure Boot.

Note: Tenable is testing for the presence of the expected signatures added in the DBX update published on March 2, 2021 referenced in the vendor advisory.

This update for grub2 fixes the following issues :

Fix for CVE-2020-10713 (bsc#1168994)

Fix for CVE-2020-14308 CVE-2020-14309, CVE-2020-14310, CVE-2020-14311 (bsc#1173812)

Fix for CVE-2020-15706 (bsc#1174463)

Fix for CVE-2020-15707 (bsc#1174570)

Use overflow checking primitives where the arithmetic expression for buffer

Use grub_calloc for overflow check and return NULL when it would occur

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for grub2 fixes the following issues :

Fix for CVE-2020-10713 (bsc#1168994)

Fix for CVE-2020-14308 CVE-2020-14309, CVE-2020-14310, CVE-2020-14311 (bsc#1173812)

Fix for CVE-2020-15706 (bsc#1174463)

Fix for CVE-2020-15707 (bsc#1174570)

Use overflow checking primitives where the arithmetic expression for buffer allocations may include unvalidated data

Use grub_calloc for overflow check and return NULL when it would occur

Use gcc-9 compiler for overflow check builtins

Backport gcc-9 build fixes

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

This update for grub2 fixes the following issues :

Fix for CVE-2020-10713 (bsc#1168994)

Fix for CVE-2020-14308 CVE-2020-14309, CVE-2020-14310, CVE-2020-14311 (bsc#1173812)

Fix for CVE-2020-15706 (bsc#1174463)

Fix for CVE-2020-15707 (bsc#1174570)

Use overflow checking primitives where the arithmetic expression for buffer allocations may include unvalidated data

Use grub_calloc for overflow check and return NULL when it would occur

Use gcc-9 compiler for overflow check builtins

Backport gcc-9 build fixes

Fix packed-not-aligned error on GCC 8 (bsc#1084632)

Note that Tenable Network Security has extracted the preceding description block directly from the SUSE security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:3227 advisory.

    The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and     customizable boot loader with modular architecture. The packages support a variety of kernel formats, file     systems, computer architectures, and hardware devices.

    The shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot     loader under secure boot environments.

    The fwupd packages provide a service that allows session software to update device firmware.

    Security Fix(es):

    * grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process (CVE-2020-10713)

    * grub2: grub_malloc does not validate allocation size allowing for arithmetic overflow and subsequent     heap-based buffer overflow (CVE-2020-14308)

    * grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow     (CVE-2020-14309)

    * grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow (CVE-2020-14310)

    * grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow (CVE-2020-14311)

    * grub2: Fail kernel validation without shim protocol (CVE-2020-15705)

    * grub2: Use-after-free redefining a function whilst the same function is already executing     (CVE-2020-15706)

    * grub2: Integer overflow in initrd size handling (CVE-2020-15707)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:3223 advisory.

    The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and     customizable boot loader with modular architecture. The packages support a variety of kernel formats, file     systems, computer architectures, and hardware devices.

    The shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot     loader under secure boot environments.

    The fwupd packages provide a service that allows session software to update device firmware.

    Security Fix(es):

    * grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process (CVE-2020-10713)

    * grub2: grub_malloc does not validate allocation size allowing for arithmetic overflow and subsequent     heap-based buffer overflow (CVE-2020-14308)

    * grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow     (CVE-2020-14309)

    * grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow (CVE-2020-14310)

    * grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow (CVE-2020-14311)

    * grub2: Fail kernel validation without shim protocol (CVE-2020-15705)

    * grub2: Use-after-free redefining a function whilst the same function is already executing     (CVE-2020-15706)

    * grub2: Integer overflow in initrd size handling (CVE-2020-15707)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote CentOS Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:3217 advisory.

  - A flaw was found in grub2, prior to version 2.06. An attacker may use the GRUB 2 flaw to hijack and tamper     the GRUB verification process. This flaw also allows the bypass of Secure Boot protections. In order to     load an untrusted or modified kernel, an attacker would first need to establish access to the system such     as gaining physical access, obtain the ability to alter a pxe-boot network, or have remote access to a     networked system with root access. With this access, an attacker could then craft a string to cause a     buffer overflow by injecting a malicious payload that leads to arbitrary code execution within GRUB. The     highest threat from this vulnerability is to data confidentiality and integrity as well as system     availability. (CVE-2020-10713)

  - In grub2 versions before 2.06 the grub memory allocator doesn't check for possible arithmetic overflows on     the requested allocation size. This leads the function to return invalid memory allocations which can be     further used to cause possible integrity, confidentiality and availability impacts during the boot     process. (CVE-2020-14308)

  - There's an issue with grub2 in all versions before 2.06 when handling squashfs filesystems containing a     symbolic link with name length of UINT32 bytes in size. The name size leads to an arithmetic overflow     leading to a zero-size allocation further causing a heap-based buffer overflow with attacker controlled     data. (CVE-2020-14309)

  - There is an issue on grub2 before version 2.06 at function read_section_as_string(). It expects a font     name to be at max UINT32_MAX - 1 length in bytes but it doesn't verify it before proceed with buffer     allocation to read the value from the font value. An attacker may leverage that by crafting a malicious     font file which has a name with UINT32_MAX, leading to read_section_as_string() to an arithmetic overflow,     zero-sized allocation and further heap-based buffer overflow. (CVE-2020-14310)

  - There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem     containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a     zero-sized memory allocation with subsequent heap-based buffer overflow. (CVE-2020-14311)

  - GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be     bypassed. This only affects systems where the kernel signing certificate has been imported directly into     the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects     GRUB2 version 2.04 and prior versions. (CVE-2020-15705)

  - GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability     which can be triggered by redefining a function whilst the same function is already executing, leading to     arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and     prior versions. (CVE-2020-15706)

  - Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux     component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2     upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number     of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files     on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot     restrictions. This issue affects GRUB2 version 2.04 and prior versions. (CVE-2020-15707)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2020:3216 advisory.

  - grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process (CVE-2020-10713)

  - grub2: grub_malloc does not validate allocation size allowing for arithmetic overflow and subsequent heap-     based buffer overflow (CVE-2020-14308)

  - grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow     (CVE-2020-14309)

  - grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow (CVE-2020-14310)

  - grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow (CVE-2020-14311)

  - grub2: Fail kernel validation without shim protocol (CVE-2020-15705)

  - grub2: Use-after-free redefining a function whilst the same function is already executing (CVE-2020-15706)

  - grub2: Integer overflow in initrd size handling (CVE-2020-15707)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2022:0064 advisory.

    Package updates are available for Alibaba Cloud Linux 3 that fix the following vulnerabilities:

    CVE-2020-10713:
    A flaw was found in grub2, prior to version 2.06. An attacker may use the GRUB 2 flaw to hijack and tamper     the GRUB verification process. This flaw also allows the bypass of Secure Boot protections. In order to     load an untrusted or modified kernel, an attacker would first need to establish access to the system such     as gaining physical access, obtain the ability to alter a pxe-boot network, or have remote access to a     networked system with root access. With this access, an attacker could then craft a string to cause a     buffer overflow by injecting a malicious payload that leads to arbitrary code execution within GRUB. The     highest threat from this vulnerability is to data confidentiality and integrity as well as system     availability.

    CVE-2020-14308:
    In grub2 versions before 2.06 the grub memory allocator doesn't check for possible arithmetic overflows on     the requested allocation size. This leads the function to return invalid memory allocations which can be     further used to cause possible integrity, confidentiality and availability impacts during the boot     process.

    CVE-2020-14309:
    There's an issue with grub2 in all versions before 2.06 when handling squashfs filesystems containing a     symbolic link with name length of UINT32 bytes in size. The name size leads to an arithmetic overflow     leading to a zero-size allocation further causing a heap-based buffer overflow with attacker controlled     data.

    CVE-2020-14310:
    There is an issue on grub2 before version 2.06 at function read_section_as_string(). It expects a font     name to be at max UINT32_MAX - 1 length in bytes but it doesn't verify it before proceed with buffer     allocation to read the value from the font value. An attacker may leverage that by crafting a malicious     font file which has a name with UINT32_MAX, leading to read_section_as_string() to an arithmetic overflow,     zero-sized allocation and further heap-based buffer overflow.

    CVE-2020-14311:
    There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem     containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a     zero-sized memory allocation with subsequent heap-based buffer overflow.

    CVE-2020-15705:
    GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be     bypassed. This only affects systems where the kernel signing certificate has been imported directly into     the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects     GRUB2 version 2.04 and prior versions.

    CVE-2020-15706:
    GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability     which can be triggered by redefining a function whilst the same function is already executing, leading to     arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and     prior versions.

    CVE-2020-15707:
    Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux     component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2     upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number     of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files     on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot     restrictions. This issue affects GRUB2 version 2.04 and prior versions.

Tenable has extracted the preceding description block directly from the Alibaba Cloud Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Tencent Linux installed on the remote TencentOS Server 3 host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the TSSA-2022:0064 advisory.

    Package updates are available for TencentOS Server 3 that fix the following vulnerabilities:

    CVE-2020-10713:
    A flaw was found in grub2, prior to version 2.06. An attacker may use the GRUB 2 flaw to hijack and tamper     the GRUB verification process. This flaw also allows the bypass of Secure Boot protections. In order to     load an untrusted or modified kernel, an attacker would first need to establish access to the system such     as gaining physical access, obtain the ability to alter a pxe-boot network, or have remote access to a     networked system with root access. With this access, an attacker could then craft a string to cause a     buffer overflow by injecting a malicious payload that leads to arbitrary code execution within GRUB. The     highest threat from this vulnerability is to data confidentiality and integrity as well as system     availability.

    CVE-2020-14308:
    In grub2 versions before 2.06 the grub memory allocator doesn't check for possible arithmetic overflows on     the requested allocation size. This leads the function to return invalid memory allocations which can be     further used to cause possible integrity, confidentiality and availability impacts during the boot     process.

    CVE-2020-14309:
    There's an issue with grub2 in all versions before 2.06 when handling squashfs filesystems containing a     symbolic link with name length of UINT32 bytes in size. The name size leads to an arithmetic overflow     leading to a zero-size allocation further causing a heap-based buffer overflow with attacker controlled     data.

    CVE-2020-14310:
    There is an issue on grub2 before version 2.06 at function read_section_as_string(). It expects a font     name to be at max UINT32_MAX - 1 length in bytes but it doesn't verify it before proceed with buffer     allocation to read the value from the font value. An attacker may leverage that by crafting a malicious     font file which has a name with UINT32_MAX, leading to read_section_as_string() to an arithmetic overflow,     zero-sized allocation and further heap-based buffer overflow.

    CVE-2020-14311:
    There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem     containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a     zero-sized memory allocation with subsequent heap-based buffer overflow.

    CVE-2020-15705:
    GRUB2 fails to validate kernel signature when booted directly without shim, allowing secure boot to be     bypassed. This only affects systems where the kernel signing certificate has been imported directly into     the secure boot database and the GRUB image is booted directly without the use of shim. This issue affects     GRUB2 version 2.04 and prior versions.

    CVE-2020-15706:
    GRUB2 contains a race condition in grub_script_function_create() leading to a use-after-free vulnerability     which can be triggered by redefining a function whilst the same function is already executing, leading to     arbitrary code execution and secure boot restriction bypass. This issue affects GRUB2 version 2.04 and     prior versions.

    CVE-2020-15707:
    Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux     component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2     upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number     of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files     on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot     restrictions. This issue affects GRUB2 version 2.04 and prior versions.

Tenable has extracted the preceding description block directly from the Tencent Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote MiracleLinux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the AXSA:2020-257:02 advisory.

    * grub2: Crafted grub.cfg file can lead to arbitrary code execution during     boot process (CVE-2020-10713)
      * grub2: grub_malloc does not validate allocation size allowing for arithmetic     overflow and subsequent heap-based buffer overflow (CVE-2020-14308)
      * grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based     buffer overflow (CVE-2020-14309)
      * grub2: Integer overflow read_section_as_string may lead to heap-based buffer     overflow (CVE-2020-14310)
      * grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer     overflow (CVE-2020-14311)
      * grub2: Fail kernel validation without shim protocol (CVE-2020-15705)
      * grub2: Use-after-free redefining a function whilst the same function is     already executing (CVE-2020-15706)
      * grub2: Integer overflow in initrd size handling (CVE-2020-15707)

Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Several vulnerabilities have been discovered in the GRUB2 bootloader.

  - CVE-2020-10713     A flaw in the grub.cfg parsing code was found allowing     to break UEFI Secure Boot and load arbitrary code.
    Details can be found at     https://www.eclypsium.com/2020/07/29/theres-a-hole-in-th     e-boot/

  - CVE-2020-14308     It was discovered that grub_malloc does not validate the     allocation size allowing for arithmetic overflow and     subsequently a heap-based buffer overflow.

  - CVE-2020-14309     An integer overflow in grub_squash_read_symlink may lead     to a heap based buffer overflow.

  - CVE-2020-14310     An integer overflow in read_section_from_string may lead     to a heap based buffer overflow.

  - CVE-2020-14311     An integer overflow in grub_ext2_read_link may lead to a     heap-based buffer overflow.

  - CVE-2020-15706     script: Avoid a use-after-free when redefining a     function during execution.

  - CVE-2020-15707     An integer overflow flaw was found in the initrd size     handling.

Further detailed information can be found at https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot

The remote Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-5786 advisory.

    - Fix CVE-2020-10713, CVE-2020-14308, CVE-2020-14309, CVE-2020-14310, CVE-2020-14311,       CVE-2020-15705, CVE-2020-15706, CVE-2020-15707 [Orabug: 31225072]

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:3217 advisory.

    The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and     customizable boot loader with modular architecture. The packages support a variety of kernel formats, file     systems, computer architectures, and hardware devices.

    The shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot     loader under secure boot environments.

    The fwupdate packages provide a service that allows session software to update device firmware.

    Security Fix(es):

    * grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process (CVE-2020-10713)

    * grub2: grub_malloc does not validate allocation size allowing for arithmetic overflow and subsequent     heap-based buffer overflow (CVE-2020-14308)

    * grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow     (CVE-2020-14309)

    * grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow (CVE-2020-14310)

    * grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow (CVE-2020-14311)

    * grub2: Fail kernel validation without shim protocol (CVE-2020-15705)

    * grub2: Use-after-free redefining a function whilst the same function is already executing     (CVE-2020-15706)

    * grub2: Integer overflow in initrd size handling (CVE-2020-15707)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Bug Fix(es):

    * grub2 doesn't handle relative paths correctly for UEFI HTTP Boot (BZ#1616395)

    * UEFI HTTP boot over IPv6 does not work (BZ#1732765)

    Users of grub2 are advised to upgrade to these updated packages, which fix these bugs.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

An update of the grub2 package has been released.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:3274 advisory.

    The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and     customizable boot loader with modular architecture. The packages support a variety of kernel formats, file     systems, computer architectures, and hardware devices.

    The shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot     loader under secure boot environments.

    The fwupdate packages provide a service that allows session software to update device firmware.

    Security Fix(es):

    * grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process (CVE-2020-10713)

    * grub2: grub_malloc does not validate allocation size allowing for arithmetic overflow and subsequent     heap-based buffer overflow (CVE-2020-14308)

    * grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow     (CVE-2020-14309)

    * grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow (CVE-2020-14310)

    * grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow (CVE-2020-14311)

    * grub2: Fail kernel validation without shim protocol (CVE-2020-15705)

    * grub2: Use-after-free redefining a function whilst the same function is already executing     (CVE-2020-15706)

    * grub2: Integer overflow in initrd size handling (CVE-2020-15707)

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

    Bug Fix(es):

    * grub2 should get resynced with 7.8 branch (BZ#1861855)

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote Oracle Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-5790 advisory.

    - Fix CVE-2020-10713, CVE-2020-14308, CVE-2020-14309, CVE-2020-14310, CVE-2020-14311,       CVE-2020-15705, CVE-2020-15706, CVE-2020-15707 [Orabug: 31225072]

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
255467	Linux Distros Unpatched Vulnerability : CVE-2020-15707	Nessus	Misc.	2025/8/26	2025/8/27	medium
294080	MiracleLinux 7 : shim-15-8.el7 (AXSA:2020-250:01)	Nessus	Miracle Linux Local Security Checks	2026/1/20	2026/1/21	high
139239	Windows Security Feature Bypass in Secure Boot (BootHole)	Nessus	Windows	2020/7/31	2026/5/5	high
139174	SUSE SLED15 / SLES15 Security Update : grub2 (SUSE-SU-2020:2074-1)	Nessus	SuSE Local Security Checks	2020/7/30	2024/2/27	high
139177	SUSE SLES12 Security Update : grub2 (SUSE-SU-2020:2078-1)	Nessus	SuSE Local Security Checks	2020/7/30	2024/2/27	high
139178	SUSE SLES12 Security Update : grub2 (SUSE-SU-2020:2079-1)	Nessus	SuSE Local Security Checks	2020/7/30	2024/2/27	high
139192	RHEL 8 : grub2 (RHSA-2020:3227)	Nessus	Red Hat Local Security Checks	2020/7/30	2024/11/7	high
139193	RHEL 8 : grub2 (RHSA-2020:3223)	Nessus	Red Hat Local Security Checks	2020/7/30	2024/11/7	high
139236	CentOS 7 : grub2 (RHSA-2020:3217)	Nessus	CentOS Local Security Checks	2020/7/31	2024/10/9	high
146030	CentOS 8 : grub2 (CESA-2020:3216)	Nessus	CentOS Local Security Checks	2021/2/1	2024/1/24	high
236457	Alibaba Cloud Linux 3 : 0064: grub2 (ALINUX3-SA-2022:0064)	Nessus	Alibaba Cloud Linux Local Security Checks	2025/5/14	2025/5/15	high
276403	TencentOS Server 3: grub2 (TSSA-2022:0064)	Nessus	Tencent Local Security Checks	2025/11/20	2025/11/22	high
294048	MiracleLinux 7 : grub2-2.02-0.86.0.1.el7.AXS7 (AXSA:2020-257:02)	Nessus	Miracle Linux Local Security Checks	2026/1/20	2026/1/21	high
139099	Debian DSA-4735-1 : grub2 - security update	Nessus	Debian Local Security Checks	2020/7/30	2024/2/27	high
139165	Oracle Linux 8 : grub2 (ELSA-2020-5786)	Nessus	Oracle Linux Local Security Checks	2020/7/30	2024/11/1	high
139198	RHEL 7 : grub2 (RHSA-2020:3217)	Nessus	Red Hat Local Security Checks	2020/7/30	2024/11/7	high
139242	Photon OS 1.0: Grub2 PHSA-2020-1.0-0311	Nessus	PhotonOS Local Security Checks	2020/8/1	2024/2/27	high
139294	RHEL 7 : grub2 (RHSA-2020:3274)	Nessus	Red Hat Local Security Checks	2020/8/3	2024/11/7	high
180945	Oracle Linux 7 : grub2 (ELSA-2020-5790)	Nessus	Oracle Linux Local Security Checks	2023/9/7	2024/10/23	high

检测

插件搜索

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