The remote Ubuntu 14.04 LTS / 16.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3786-1 advisory.

    It was discovered that libxkbcommon incorrectly handled certain files. An attacker could possibly use this     issue to cause a denial of service. (CVE-2018-15853, CVE-2018-15854, CVE-2018-15855, CVE-2018-15856,     CVE-2018-15857, CVE-2018-15858, CVE-2018-15859, CVE-2018-15861, CVE-2018-15862, CVE-2018-15863,     CVE-2018-15864)

Tenable has extracted the preceding description block directly from the Ubuntu 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 Ubuntu 18.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-3786-2 advisory.

    USN-3786-1 fixed several vulnerabilities in libxkbcommon. This update provides the corresponding update     for Ubuntu 18.04 LTS.



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

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

This update for libxkbcommon to version 0.8.2 fixes the following issues :

  - Fix a few NULL-dereferences, out-of-bounds access and     undefined behavior in the XKB text format parser.

  - CVE-2018-15853: Endless recursion could have been used     by local attackers to crash xkbcommon users by supplying     a crafted keymap file that triggers boolean negation     (bsc#1105832).

  - CVE-2018-15854: Unchecked NULL pointer usage could have     been used by local attackers to crash (NULL pointer     dereference) the xkbcommon parser by supplying a crafted     keymap file, because geometry tokens were desupported     incorrectly (bsc#1105832).

  - CVE-2018-15855: Unchecked NULL pointer usage could have     been used by local attackers to crash (NULL pointer     dereference) the xkbcommon parser by supplying a crafted     keymap file, because the XkbFile for an xkb_geometry     section was mishandled (bsc#1105832).

  - CVE-2018-15856: An infinite loop when reaching EOL     unexpectedly could be used by local attackers to cause a     denial of service during parsing of crafted keymap files     (bsc#1105832).

  - CVE-2018-15857: An invalid free in     ExprAppendMultiKeysymList could have been used by local     attackers to crash xkbcommon keymap parsers or possibly     have unspecified other impact by supplying a crafted     keymap file (bsc#1105832).

  - CVE-2018-15858: Unchecked NULL pointer usage when     handling invalid aliases in CopyKeyAliasesToKeymap could     have been used by local attackers to crash (NULL pointer     dereference) the xkbcommon parser by supplying a crafted     keymap file (bsc#1105832).

  - CVE-2018-15859: Unchecked NULL pointer usage when     parsing invalid atoms in ExprResolveLhs could have been     used by local attackers to crash (NULL pointer     dereference) the xkbcommon parser by supplying a crafted     keymap file, because lookup failures are mishandled     (bsc#1105832).

  - CVE-2018-15861: Unchecked NULL pointer usage in     ExprResolveLhs could have been used by local attackers     to crash (NULL pointer dereference) the xkbcommon parser     by supplying a crafted keymap file that triggers an     xkb_intern_atom failure (bsc#1105832).

  - CVE-2018-15862: Unchecked NULL pointer usage in     LookupModMask could have been used by local attackers to     crash (NULL pointer dereference) the xkbcommon parser by     supplying a crafted keymap file with invalid virtual     modifiers (bsc#1105832).

  - CVE-2018-15863: Unchecked NULL pointer usage in     ResolveStateAndPredicate could have been used by local     attackers to crash (NULL pointer dereference) the     xkbcommon parser by supplying a crafted keymap file with     a no-op modmask expression (bsc#1105832).

  - CVE-2018-15864: Unchecked NULL pointer usage in     resolve_keysym could have been used by local attackers     to crash (NULL pointer dereference) the xkbcommon parser     by supplying a crafted keymap file, because a map access     attempt can occur for a map that was never created     (bsc#1105832).

This update was imported from the SUSE:SLE-15:Update update project.

An update for Xorg is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

X.Org is an open source implementation of the X Window System. It provides the basic low-level functionality that full-fledged graphical user interfaces are designed upon.

Security Fix(es) :

* libX11: Crash on invalid reply in XListExtensions in ListExt.c (CVE-2018-14598)

* libX11: Off-by-one error in XListExtensions in ListExt.c (CVE-2018-14599)

* libX11: Out of Bounds write in XListExtensions in ListExt.c (CVE-2018-14600)

* libxkbcommon: Invalid free in ExprAppendMultiKeysymList resulting in a crash (CVE-2018-15857)

* libxkbcommon: Endless recursion in xkbcomp/expr.c resulting in a crash (CVE-2018-15853)

* libxkbcommon: NULL pointer dereference resulting in a crash (CVE-2018-15854)

* libxkbcommon: NULL pointer dereference when handling xkb_geometry (CVE-2018-15855)

* libxkbcommon: Infinite loop when reaching EOL unexpectedly resulting in a crash (CVE-2018-15856)

* libxkbcommon: NULL pointer dereference when parsing invalid atoms in ExprResolveLhs resulting in a crash (CVE-2018-15859)

* libxkbcommon: NULL pointer dereference in ExprResolveLhs resulting in a crash (CVE-2018-15861)

* libxkbcommon: NULL pointer dereference in LookupModMask resulting in a crash (CVE-2018-15862)

* libxkbcommon: NULL pointer dereference in ResolveStateAndPredicate resulting in a crash (CVE-2018-15863)

* libxkbcommon: NULL pointer dereference in resolve_keysym resulting in a crash (CVE-2018-15864)

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.

Additional Changes :

For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.7 Release Notes linked from the References section.

According to the versions of the libxkbcommon package installed, the EulerOS Virtualization for ARM 64 installation on the remote host is affected by the following vulnerabilities :

  - Endless recursion exists in xkbcomp/expr.c in xkbcommon     and libxkbcommon before 0.8.1, which could be used by     local attackers to crash xkbcommon users by supplying a     crafted keymap file that triggers boolean     negation.(CVE-2018-15853)

  - Unchecked NULL pointer usage when parsing invalid atoms     in ExprResolveLhs in xkbcomp/expr.c in xkbcommon before     0.8.2 could be used by local attackers to crash (NULL     pointer dereference) the xkbcommon parser by supplying     a crafted keymap file, because lookup failures are     mishandled.(CVE-2018-15859)

  - Unchecked NULL pointer usage in ExprResolveLhs in     xkbcomp/expr.c in xkbcommon before 0.8.2 could be used     by local attackers to crash (NULL pointer dereference)     the xkbcommon parser by supplying a crafted keymap file     that triggers an xkb_intern_atom     failure.(CVE-2018-15861)

  - Unchecked NULL pointer usage in LookupModMask in     xkbcomp/expr.c in xkbcommon before 0.8.2 could be used     by local attackers to crash (NULL pointer dereference)     the xkbcommon parser by supplying a crafted keymap file     with invalid virtual modifiers.(CVE-2018-15862)

  - Unchecked NULL pointer usage in     ResolveStateAndPredicate in xkbcomp/compat.c in     xkbcommon before 0.8.2 could be used by local attackers     to crash (NULL pointer dereference) the xkbcommon     parser by supplying a crafted keymap file with a no-op     modmask expression.(CVE-2018-15863)

  - Unchecked NULL pointer usage in resolve_keysym in     xkbcomp/parser.y in xkbcommon before 0.8.2 could be     used by local attackers to crash (NULL pointer     dereference) the xkbcommon parser by supplying a     crafted keymap file, because a map access attempt can     occur for a map that was never created.(CVE-2018-15864)

  - An invalid free in ExprAppendMultiKeysymList in     xkbcomp/ast-build.c in xkbcommon before 0.8.1 could be     used by local attackers to crash xkbcommon keymap     parsers or possibly have unspecified other impact by     supplying a crafted keymap file.(CVE-2018-15857)

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.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2019:2079 advisory.

    X.Org is an open-source implementation of the X Window System. It provides the basic low-level     functionality that full-fledged graphical user interfaces are designed upon.

    Security Fix(es):

    * libX11: Crash on invalid reply in XListExtensions in ListExt.c (CVE-2018-14598)

    * libX11: Off-by-one error in XListExtensions in ListExt.c (CVE-2018-14599)

    * libX11: Out of Bounds write in XListExtensions in ListExt.c (CVE-2018-14600)

    * libxkbcommon: Invalid free in ExprAppendMultiKeysymList resulting in a crash (CVE-2018-15857)

    * libxkbcommon: Endless recursion in xkbcomp/expr.c resulting in a crash (CVE-2018-15853)

    * libxkbcommon: NULL pointer dereference resulting in a crash (CVE-2018-15854)

    * libxkbcommon: NULL pointer dereference when handling xkb_geometry (CVE-2018-15855)

    * libxkbcommon: Infinite loop when reaching EOL unexpectedly resulting in a crash (CVE-2018-15856)

    * libxkbcommon: NULL pointer dereference when parsing invalid atoms in ExprResolveLhs resulting in a crash     (CVE-2018-15859)

    * libxkbcommon: NULL pointer dereference in ExprResolveLhs resulting in a crash (CVE-2018-15861)

    * libxkbcommon: NULL pointer dereference in LookupModMask resulting in a crash (CVE-2018-15862)

    * libxkbcommon: NULL pointer dereference in ResolveStateAndPredicate resulting in a crash (CVE-2018-15863)

    * libxkbcommon: NULL pointer dereference in resolve_keysym resulting in a crash (CVE-2018-15864)

    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.

    Additional Changes:

    For detailed information on changes in this release, see the Red Hat Enterprise Linux 7.7 Release Notes     linked from 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 NewStart CGSL host, running version CORE 5.05 / MAIN 5.05, has libxkbcommon packages installed that are affected by multiple vulnerabilities:

  - Unchecked NULL pointer usage in LookupModMask in     xkbcomp/expr.c in xkbcommon before 0.8.2 could be used     by local attackers to crash (NULL pointer dereference)     the xkbcommon parser by supplying a crafted keymap file     with invalid virtual modifiers. (CVE-2018-15862)

  - Unchecked NULL pointer usage in ResolveStateAndPredicate     in xkbcomp/compat.c in xkbcommon before 0.8.2 could be     used by local attackers to crash (NULL pointer     dereference) the xkbcommon parser by supplying a crafted     keymap file with a no-op modmask expression.
    (CVE-2018-15863)

  - Unchecked NULL pointer usage in resolve_keysym in     xkbcomp/parser.y in xkbcommon before 0.8.2 could be used     by local attackers to crash (NULL pointer dereference)     the xkbcommon parser by supplying a crafted keymap file,     because a map access attempt can occur for a map that     was never created. (CVE-2018-15864)

  - Endless recursion exists in xkbcomp/expr.c in xkbcommon     and libxkbcommon before 0.8.1, which could be used by     local attackers to crash xkbcommon users by supplying a     crafted keymap file that triggers boolean negation.
    (CVE-2018-15853)

  - Unchecked NULL pointer usage when parsing invalid atoms     in ExprResolveLhs in xkbcomp/expr.c in xkbcommon before     0.8.2 could be used by local attackers to crash (NULL     pointer dereference) the xkbcommon parser by supplying a     crafted keymap file, because lookup failures are     mishandled. (CVE-2018-15859)

  - Unchecked NULL pointer usage in ExprResolveLhs in     xkbcomp/expr.c in xkbcommon before 0.8.2 could be used     by local attackers to crash (NULL pointer dereference)     the xkbcommon parser by supplying a crafted keymap file     that triggers an xkb_intern_atom failure.
    (CVE-2018-15861)

  - An invalid free in ExprAppendMultiKeysymList in     xkbcomp/ast-build.c in xkbcommon before 0.8.1 could be     used by local attackers to crash xkbcommon keymap     parsers or possibly have unspecified other impact by     supplying a crafted keymap file. (CVE-2018-15857)

  - An infinite loop when reaching EOL unexpectedly in     compose/parser.c (aka the keymap parser) in xkbcommon     before 0.8.1 could be used by local attackers to cause a     denial of service during parsing of crafted keymap     files. (CVE-2018-15856)

  - Unchecked NULL pointer usage in xkbcommon before 0.8.1     could be used by local attackers to crash (NULL pointer     dereference) the xkbcommon parser by supplying a crafted     keymap file, because the XkbFile for an xkb_geometry     section was mishandled. (CVE-2018-15855)

  - Unchecked NULL pointer usage in xkbcommon before 0.8.1     could be used by local attackers to crash (NULL pointer     dereference) the xkbcommon parser by supplying a crafted     keymap file, because geometry tokens were desupported     incorrectly. (CVE-2018-15854)

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 AOS installed on the remote host is prior to 5.16. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AOS-5.16 advisory.

  - Gnome Pango 1.42 and later is affected by: Buffer Overflow. The impact is: The heap based buffer overflow     can be used to get code execution. The component is: function name: pango_log2vis_get_embedding_levels,     assignment of nchars and the loop condition. The attack vector is: Bug can be used when application pass     invalid utf-8 strings to functions like pango_itemize. (CVE-2019-1010238)

  - curl before version 7.61.1 is vulnerable to a buffer overrun in the NTLM authentication code. The internal     function Curl_ntlm_core_mk_nt_hash multiplies the length of the password by two (SUM) to figure out how     large temporary storage area to allocate from the heap. The length value is then subsequently used to     iterate over the password and generate output into the allocated storage buffer. On systems with a 32 bit     size_t, the math to calculate SUM triggers an integer overflow when the password length exceeds 2GB (2^31     bytes). This integer overflow usually causes a very small buffer to actually get allocated instead of the     intended very huge one, making the use of that buffer end up in a heap buffer overflow. (This bug is     almost identical to CVE-2017-8816.) (CVE-2018-14618)

  - An issue was discovered in XListExtensions in ListExt.c in libX11 through 1.6.5. A malicious server can     send a reply in which the first string overflows, causing a variable to be set to NULL that will be freed     later on, leading to DoS (segmentation fault). (CVE-2018-14598)

  - An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c is vulnerable     to an off-by-one error caused by malicious server responses, leading to DoS or possibly unspecified other     impact. (CVE-2018-14599)

  - An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c interprets a     variable as signed instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes), leading     to DoS or remote code execution. (CVE-2018-14600)

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 AOS installed on the remote host is prior to 5.11.2. It is, therefore, affected by multiple vulnerabilities as referenced in the NXSA-AOS-5.11.2 advisory.

  - Gnome Pango 1.42 and later is affected by: Buffer Overflow. The impact is: The heap based buffer overflow     can be used to get code execution. The component is: function name: pango_log2vis_get_embedding_levels,     assignment of nchars and the loop condition. The attack vector is: Bug can be used when application pass     invalid utf-8 strings to functions like pango_itemize. (CVE-2019-1010238)

  - curl before version 7.61.1 is vulnerable to a buffer overrun in the NTLM authentication code. The internal     function Curl_ntlm_core_mk_nt_hash multiplies the length of the password by two (SUM) to figure out how     large temporary storage area to allocate from the heap. The length value is then subsequently used to     iterate over the password and generate output into the allocated storage buffer. On systems with a 32 bit     size_t, the math to calculate SUM triggers an integer overflow when the password length exceeds 2GB (2^31     bytes). This integer overflow usually causes a very small buffer to actually get allocated instead of the     intended very huge one, making the use of that buffer end up in a heap buffer overflow. (This bug is     almost identical to CVE-2017-8816.) (CVE-2018-14618)

  - An issue was discovered in XListExtensions in ListExt.c in libX11 through 1.6.5. A malicious server can     send a reply in which the first string overflows, causing a variable to be set to NULL that will be freed     later on, leading to DoS (segmentation fault). (CVE-2018-14598)

  - An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c is vulnerable     to an off-by-one error caused by malicious server responses, leading to DoS or possibly unspecified other     impact. (CVE-2018-14599)

  - An issue was discovered in libX11 through 1.6.5. The function XListExtensions in ListExt.c interprets a     variable as signed instead of unsigned, resulting in an out-of-bounds write (of up to 128 bytes), leading     to DoS or remote code execution. (CVE-2018-14600)

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-2019-2079 advisory.

    - Fixes for       CVE-2018-15864, CVE-2018-15863, CVE-2018-15862, CVE-2018-15861,       CVE-2018-15859  CVE-2018-15857, CVE-2018-15856, CVE-2018-15855,       CVE-2018-15854, CVE-2018-15853

    mesa-libGLw

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
117996	Ubuntu 14.04 LTS / 16.04 LTS : libxkbcommon vulnerabilities (USN-3786-1)	Nessus	Ubuntu Local Security Checks	2018/10/9	2024/8/27	high
118794	Ubuntu 18.04 LTS : libxkbcommon vulnerabilities (USN-3786-2)	Nessus	Ubuntu Local Security Checks	2018/11/7	2024/10/29	high
119023	openSUSE Security Update : libxkbcommon (openSUSE-2018-1418)	Nessus	SuSE Local Security Checks	2018/11/19	2024/7/22	high
128349	CentOS 7 : gdm / libX11 / libxkbcommon / xorg-x11-drv-ati / xorg-x11-drv-vesa / etc (CESA-2019:2079)	Nessus	CentOS Local Security Checks	2019/8/30	2024/4/30	critical
134535	EulerOS Virtualization for ARM 64 3.0.2.0 : libxkbcommon (EulerOS-SA-2020-1246)	Nessus	Huawei Local Security Checks	2020/3/13	2024/3/22	high
127668	RHEL 7 : Xorg (RHSA-2019:2079)	Nessus	Red Hat Local Security Checks	2019/8/12	2024/11/6	critical
132511	NewStart CGSL CORE 5.05 / MAIN 5.05 : libxkbcommon Multiple Vulnerabilities (NS-SA-2019-0246)	Nessus	NewStart CGSL Local Security Checks	2019/12/31	2021/1/14	high
164573	Nutanix AOS : Multiple Vulnerabilities (NXSA-AOS-5.16)	Nessus	Misc.	2022/9/1	2025/7/22	critical
164608	Nutanix AOS : Multiple Vulnerabilities (NXSA-AOS-5.11.2)	Nessus	Misc.	2022/9/1	2025/7/22	critical
180786	Oracle Linux 7 : Xorg (ELSA-2019-2079)	Nessus	Oracle Linux Local Security Checks	2023/9/7	2024/11/1	critical

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