The version of shim / shim-unsigned-aarch64 installed on the remote Azure Linux 3.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2022-28737 advisory.

  - There's a possible overflow in handle_image() when shim tries to load and execute crafted EFI executables;
    The handle_image() function takes into account the SizeOfRawData field from each section to be loaded. An     attacker can leverage this to perform out-of-bound writes into memory. Arbitrary code execution is not     discarded in such scenario. (CVE-2022-28737)

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

The version of shim / shim-unsigned-aarch64 installed on the remote CBL Mariner 2.0 host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the CVE-2022-28737 advisory.

  - There's a possible overflow in handle_image() when shim tries to load and execute crafted EFI executables;
    The handle_image() function takes into account the SizeOfRawData field from each section to be loaded. An     attacker can leverage this to perform out-of-bound writes into memory. Arbitrary code execution is not     discarded in such scenario. (CVE-2022-28737)

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

The remote Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2022-5099 advisory.

    - CVE-2022-28736 CVE-2022-28735 CVE-2022-28734 CVE-2022-28733
    - CVE-2021-3697 CVE-2021-3696 CVE-2021-3695

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 Oracle Linux 9 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2022-9596 advisory.

    - CVE-2022-28736 CVE-2022-28735 CVE-2022-28734 CVE-2022-28733
    - CVE-2021-3697 CVE-2021-3696 CVE-2021-3695

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 Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2022-9595 advisory.

    - Add CVE-2020-15706, CVE-2020-15707 to the list [Orabug: 31225072]
    - CVE-2022-28736 CVE-2022-28735 CVE-2022-28734 CVE-2022-28733
    - CVE-2021-3697 CVE-2021-3696 CVE-2021-3695

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 host is affected by the vulnerability described in GLSA-202209-12 (GRUB: Multiple Vulnerabilities)

  - A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may     take advantage of that to cause heap data corruption or eventually arbitrary code execution and circumvent     secure boot protections. This issue has a high complexity to be exploited as an attacker needs to perform     some triage over the heap layout to achieve signifcant results, also the values written into the memory     are repeated three times in a row making difficult to produce valid payloads. This flaw affects grub2     versions prior grub-2.12. (CVE-2021-3695)

  - A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may     lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be     considered Low as it's very complex to an attacker control the encoding and positioning of corrupted     Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This     flaw affects grub2 versions prior grub-2.12. (CVE-2021-3696)

  - A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data     to be written in heap. To a successful to be performed the attacker needs to perform some triage over the     heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data     corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions     prior grub-2.12. (CVE-2021-3697)

  - A flaw in grub2 was found where its configuration file, known as grub.cfg, is being created with the wrong     permission set allowing non privileged users to read its content. This represents a low severity     confidentiality issue, as those users can eventually read any encrypted passwords present in grub.cfg.
    This flaw affects grub2 2.06 and previous versions. This issue has been fixed in grub upstream but no     version with the fix is currently released. (CVE-2021-3981)

  - grub2: Integer underflow in grub_net_recv_ip4_packets (CVE-2022-28733)

  - grub2: Out-of-bound write when handling split HTTP headers (CVE-2022-28734)

  - grub2: shim_lock verifier allows non-kernel files to be loaded (CVE-2022-28735)

  - grub2: use-after-free in grub_cmd_chainloader() (CVE-2022-28736)

  - shim: Buffer overflow when loading crafted EFI images (CVE-2022-28737)

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-2022:0134 advisory.

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

    CVE-2021-3695:
    A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may     take advantage of that to cause heap data corruption or eventually arbitrary code execution and circumvent     secure boot protections. This issue has a high complexity to be exploited as an attacker needs to perform     some triage over the heap layout to achieve signifcant results, also the values written into the memory     are repeated three times in a row making difficult to produce valid payloads. This flaw affects grub2     versions prior grub-2.12.

    CVE-2021-3696:
    A heap out-of-bounds write may heppen during the handling of Huffman tables in the PNG reader. This may     lead to data corruption in the heap space. Confidentiality, Integrity and Availablity impact may be     considered Low as it's very complex to an attacker control the encoding and positioning of corrupted     Huffman entries to achieve results such as arbitrary code execution and/or secure boot circumvention. This     flaw affects grub2 versions prior grub-2.12.

    CVE-2021-3697:
    A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data     to be written in heap. To a successful to be performed the attacker needs to perform some triage over the     heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data     corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions     prior grub-2.12.

    CVE-2022-28733:
    ** 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-2022-28734:
    ** 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-2022-28735:
    ** 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-2022-28736:
    ** 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-2022-28737:
    ** 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.

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 SUSE Linux SLES12 / SLES_SAP12 host has a package installed that is affected by multiple vulnerabilities as referenced in the SUSE-SU-2024:1462-1 advisory.

    - Update shim-install to set the TPM2 SRK algorithm (bsc#1213945)
    - Limit the requirement of fde-tpm-helper-macros to the distro with       suse_version 1600 and above (bsc#1219460)

    Update to version 15.8:

    Security issues fixed:

    - mok: fix LogError() invocation (bsc#1215099,CVE-2023-40546)
    - avoid incorrectly trusting HTTP headers (bsc#1215098,CVE-2023-40547)
    - Fix integer overflow on SBAT section size on 32-bit system (bsc#1215100,CVE-2023-40548)
    - Authenticode: verify that the signature header is in bounds (bsc#1215101,CVE-2023-40549)
    - pe: Fix an out-of-bound read in verify_buffer_sbat() (bsc#1215102,CVE-2023-40550)
    - pe-relocate: Fix bounds check for MZ binaries (bsc#1215103,CVE-2023-40551)


    The NX flag is disable which is same as the default value of shim-15.8, hence, not need to enable it by     this patch now.

    - Generate dbx during build so we don't include binary files in sources
    - Don't require grub so shim can still be used with systemd-boot
    - Update shim-install to fix boot failure of ext4 root file system       on RAID10 (bsc#1205855)
    - Adopt the macros from fde-tpm-helper-macros to update the       signature in the sealed key after a bootloader upgrade

    - Update shim-install to amend full disk encryption support
      - Adopt TPM 2.0 Key File for grub2 TPM 2.0 protector
      - Use the long name to specify the grub2 key protector
      - cryptodisk: support TPM authorized policies
      - Do not use tpm_record_pcrs unless the command is in command.lst

    - Removed POST_PROCESS_PE_FLAGS=-N from the build command in shim.spec to       enable the NX compatibility flag when using post-process-pe after       discussed with grub2 experts in mail. It's useful for further development       and testing. (bsc#1205588)

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

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

According to the versions of the shim-signed packages installed, the EulerOS Virtualization installation on the remote host is affected by the following vulnerabilities :

  - While parsing an IPAddressFamily extension in an X.509 certificate, it is possible to do a one-byte     overread. This would result in an incorrect text display of the certificate. This bug has been present     since 2006 and is present in all versions of OpenSSL before 1.0.2m and 1.1.0g. (CVE-2017-3735)

  - Constructed ASN.1 types with a recursive definition (such as can be found in PKCS7) could eventually     exceed the stack given malicious input with excessive recursion. This could result in a Denial Of Service     attack. There are no such structures used within SSL/TLS that come from untrusted sources so this is     considered safe. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g). Fixed in OpenSSL 1.0.2o (Affected     1.0.2b-1.0.2n). (CVE-2018-0739)

  - In situations where an attacker receives automated notification of the success or failure of a decryption     attempt an attacker, after sending a very large number of messages to be decrypted, can recover a     CMS/PKCS7 transported encryption key or decrypt any RSA encrypted message that was encrypted with the     public RSA key, using a Bleichenbacher padding oracle attack. Applications are not affected if they use a     certificate together with the private RSA key to the CMS_decrypt or PKCS7_decrypt functions to select the     correct recipient info to decrypt. Fixed in OpenSSL 1.1.1d (Affected 1.1.1-1.1.1c). Fixed in OpenSSL     1.1.0l (Affected 1.1.0-1.1.0k). Fixed in OpenSSL 1.0.2t (Affected 1.0.2-1.0.2s). (CVE-2019-1563)

  - Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate may overflow the output length argument     in some cases where the input length is close to the maximum permissable length for an integer on the     platform. In such cases the return value from the function call will be 1 (indicating success), but the     output length value will be negative. This could cause applications to behave incorrectly or crash.
    OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to     OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out     of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should     upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i).
    Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x). (CVE-2021-23840)

  - ASN.1 strings are represented internally within OpenSSL as an ASN1_STRING structure which contains a     buffer holding the string data and a field holding the buffer length. This contrasts with normal C strings     which are repesented as a buffer for the string data which is terminated with a NUL (0) byte. Although not     a strict requirement, ASN.1 strings that are parsed using OpenSSL's own 'd2i' functions (and other similar     parsing functions) as well as any string whose value has been set with the ASN1_STRING_set() function will     additionally NUL terminate the byte array in the ASN1_STRING structure. However, it is possible for     applications to directly construct valid ASN1_STRING structures which do not NUL terminate the byte array     by directly setting the 'data' and 'length' fields in the ASN1_STRING array. This can also happen by using     the ASN1_STRING_set0() function. Numerous OpenSSL functions that print ASN.1 data have been found to     assume that the ASN1_STRING byte array will be NUL terminated, even though this is not guaranteed for     strings that have been directly constructed. Where an application requests an ASN.1 structure to be     printed, and where that ASN.1 structure contains ASN1_STRINGs that have been directly constructed by the     application without NUL terminating the 'data' field, then a read buffer overrun can occur. The same thing     can also occur during name constraints processing of certificates (for example if a certificate has been     directly constructed by the application instead of loading it via the OpenSSL parsing functions, and the     certificate contains non NUL terminated ASN1_STRING structures). It can also occur in the     X509_get1_email(), X509_REQ_get1_email() and X509_get1_ocsp() functions. If a malicious actor can cause an     application to directly construct an ASN1_STRING and then process it through one of the affected OpenSSL     functions then this issue could be hit. This might result in a crash (causing a Denial of Service attack).
    It could also result in the disclosure of private memory contents (such as private keys, or sensitive     plaintext). Fixed in OpenSSL 1.1.1l (Affected 1.1.1-1.1.1k). Fixed in OpenSSL 1.0.2za (Affected     1.0.2-1.0.2y). (CVE-2021-3712)

  - The BN_mod_sqrt() function, which computes a modular square root, contains a bug that can cause it to loop     forever for non-prime moduli. Internally this function is used when parsing certificates that contain     elliptic curve public keys in compressed form or explicit elliptic curve parameters with a base point     encoded in compressed form. It is possible to trigger the infinite loop by crafting a certificate that has     invalid explicit curve parameters. Since certificate parsing happens prior to verification of the     certificate signature, any process that parses an externally supplied certificate may thus be subject to a     denial of service attack. The infinite loop can also be reached when parsing crafted private keys as they     can contain explicit elliptic curve parameters. Thus vulnerable situations include: - TLS clients     consuming server certificates - TLS servers consuming client certificates - Hosting providers taking     certificates or private keys from customers - Certificate authorities parsing certification requests from     subscribers - Anything else which parses ASN.1 elliptic curve parameters Also any other applications that     use the BN_mod_sqrt() where the attacker can control the parameter values are vulnerable to this DoS     issue. In the OpenSSL 1.0.2 version the public key is not parsed during initial parsing of the certificate     which makes it slightly harder to trigger the infinite loop. However any operation which requires the     public key from the certificate will trigger the infinite loop. In particular the attacker can use a self-     signed certificate to trigger the loop during verification of the certificate signature. This issue     affects OpenSSL versions 1.0.2, 1.1.1 and 3.0. It was addressed in the releases of 1.1.1n and 3.0.2 on the     15th March 2022. Fixed in OpenSSL 3.0.2 (Affected 3.0.0,3.0.1). Fixed in OpenSSL 1.1.1n (Affected     1.1.1-1.1.1m). Fixed in OpenSSL 1.0.2zd (Affected 1.0.2-1.0.2zc). (CVE-2022-0778)

  - There's a possible overflow in handle_image() when shim tries to load and execute crafted EFI executables;
    The handle_image() function takes into account the SizeOfRawData field from each section to be loaded. An     attacker can leverage this to perform out-of-bound writes into memory. Arbitrary code execution is not     discarded in such scenario. (CVE-2022-28737)

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

ID	名称	产品	系列	发布时间	最近更新时间	严重程度
215391	Azure Linux 3.0 Security Update: shim / shim-unsigned-aarch64 (CVE-2022-28737)	Nessus	Azure Linux Local Security Checks	2025/2/10	2025/9/15	high
207023	CBL Mariner 2.0 Security Update: shim / shim-unsigned-aarch64 (CVE-2022-28737)	Nessus	MarinerOS Local Security Checks	2024/9/12	2024/12/13	high
162790	Oracle Linux 9 : grub2 (ELSA-2022-5099)	Nessus	Oracle Linux Local Security Checks	2022/7/7	2024/11/1	high
163097	Oracle Linux 9 : grub2 (ELSA-2022-9596)	Nessus	Oracle Linux Local Security Checks	2022/7/14	2024/11/2	high
163114	Oracle Linux 8 : grub2 (ELSA-2022-9595)	Nessus	Oracle Linux Local Security Checks	2022/7/14	2024/11/2	high
165446	GLSA-202209-12 : GRUB: Multiple Vulnerabilities	Nessus	Gentoo Local Security Checks	2022/9/25	2024/1/18	high
239303	TencentOS Server 3: grub2, mokutil, shim, and shim-unsigned-x64 (TSSA-2022:0134)	Nessus	Tencent Local Security Checks	2025/6/16	2025/11/20	high
194740	SUSE SLES12 Security Update : shim (SUSE-SU-2024:1462-1)	Nessus	SuSE Local Security Checks	2024/4/30	2026/6/25	high
175177	EulerOS Virtualization 3.0.2.0 : shim-signed (EulerOS-SA-2023-1748)	Nessus	Huawei Local Security Checks	2023/5/7	2024/1/16	high

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