This update incorporates fixes from the upstream glibc 2.29 stable release branch, including 3 fixes for medium severity security vulnerabilities. (CVE-2020-10029, CVE-2020-1752, CVE-2020-1751)

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

According to the versions of the glibc packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - A use-after-free vulnerability introduced in glibc     upstream version 2.14 was found in the way the tilde     expansion was carried out. Directory paths containing     an initial tilde followed by a valid username were     affected by this issue. A local attacker could exploit     this flaw by creating a specially crafted path that,     when processed by the glob function, would potentially     lead to arbitrary code execution. This was fixed in     version 2.32.(CVE-2020-1752)

  - The GNU C Library (aka glibc or libc6) before 2.32     could overflow an on-stack buffer during range     reduction if an input to an 80-bit long double function     contains a non-canonical bit pattern, a seen when     passing a 0x5d414141414141410000 value to sinl on x86     targets. This is related to     sysdeps/ieee754/ldbl-96/e_rem_pio2l.c.(CVE-2020-10029)

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 Ubuntu 16.04 LTS / 18.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-4416-1 advisory.

    Florian Weimer discovered that the GNU C Library incorrectly handled certain memory operations. A remote     attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or     possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS. (CVE-2017-12133)

    It was discovered that the GNU C Library incorrectly handled certain SSE2-optimized memmove operations. A     remote attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of     service, or possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS. (CVE-2017-18269)

    It was discovered that the GNU C Library incorrectly handled certain pathname operations. A remote     attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or     possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-11236)

    It was discovered that the GNU C Library incorrectly handled certain AVX-512-optimized mempcpy operations.
    A remote attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of     service, or possibly execute arbitrary code. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-11237)

    It was discovered that the GNU C Library incorrectly handled certain hostname loookups. A remote attacker     could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly     execute arbitrary code. This issue only affected Ubuntu 18.04 LTS. (CVE-2018-19591)

    Jakub Wilk discovered that the GNU C Library incorrectly handled certain memalign functions. A remote     attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of service, or     possibly execute arbitrary code. This issue only affected Ubuntu 16.04 LTS. (CVE-2018-6485)

    It was discovered that the GNU C Library incorrectly ignored the LD_PREFER_MAP_32BIT_EXEC environment     variable after security transitions. A local attacker could use this issue to bypass ASLR restrictions.
    (CVE-2019-19126)

    It was discovered that the GNU C Library incorrectly handled certain regular expressions. A remote     attacker could possibly use this issue to cause the GNU C Library to crash, resulting in a denial of     service. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2019-9169)

    It was discovered that the GNU C Library incorrectly handled certain bit patterns. A remote attacker could     use this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute     arbitrary code. This issue only affected Ubuntu 16.04 LTS and Ubuntu 18.04 LTS. (CVE-2020-10029)

    It was discovered that the GNU C Library incorrectly handled certain signal trampolines on PowerPC. A     remote attacker could use this issue to cause the GNU C Library to crash, resulting in a denial of     service, or possibly execute arbitrary code. (CVE-2020-1751)

    It was discovered that the GNU C Library incorrectly handled tilde expansion. A remote attacker could use     this issue to cause the GNU C Library to crash, resulting in a denial of service, or possibly execute     arbitrary code. (CVE-2020-1752)

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 Alibaba Cloud Linux 3 host has packages installed that are affected by multiple vulnerabilities as referenced in the ALINUX3-SA-2022:0122 advisory.

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

    CVE-2019-19126:
    On the x86-64 architecture, the GNU C Library (aka glibc) before 2.31 fails to ignore the     LD_PREFER_MAP_32BIT_EXEC environment variable during program execution after a security transition,     allowing local attackers to restrict the possible mapping addresses for loaded libraries and thus bypass     ASLR for a setuid program.

    CVE-2020-10029:
    The GNU C Library (aka glibc or libc6) before 2.32 could overflow an on-stack buffer during range     reduction if an input to an 80-bit long double function contains a non-canonical bit pattern, a seen when     passing a 0x5d414141414141410000 value to sinl on x86 targets. This is related to     sysdeps/ieee754/ldbl-96/e_rem_pio2l.c.

    CVE-2020-1751:
    An out-of-bounds write vulnerability was found in glibc before 2.31 when handling signal trampolines on     PowerPC. Specifically, the backtrace function did not properly check the array bounds when storing the     frame address, resulting in a denial of service or potential code execution. The highest threat from this     vulnerability is to system availability.

    CVE-2020-1752:
    A use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde     expansion was carried out. Directory paths containing an initial tilde followed by a valid username were     affected by this issue. A local attacker could exploit this flaw by creating a specially crafted path     that, when processed by the glob function, would potentially lead to arbitrary code execution. This was     fixed in version 2.32.

    CVE-2020-6096:
    An exploitable signed comparison vulnerability exists in the ARMv7 memcpy() implementation of GNU glibc     2.30.9000. Calling memcpy() (on ARMv7 targets that utilize the GNU glibc implementation) with a negative     value for the 'num' parameter results in a signed comparison vulnerability. If an attacker underflows the     'num' parameter to memcpy(), this vulnerability could lead to undefined behavior such as writing to out-     of-bounds memory and potentially remote code execution. Furthermore, this memcpy() implementation allows     for program execution to continue in scenarios where a segmentation fault or crash should have occurred.
    The dangers occur in that subsequent execution and iterations of this code will be executed with this     corrupted data.

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.

According to the versions of the glibc packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

  - The glibc package contains standard libraries which are     used by multiple programs on the system. In order to     save disk space and memory, as well as to make     upgrading easier, common system code is kept in one     place and shared between programs. This particular     package contains the most important sets of shared     libraries: the standard C library and the standard math     library. Without these two libraries, a Linux system     will not function.Security Fix(es):Stack-based buffer     overflow in the getaddrinfo function in     sysdeps/posix/getaddrinfo.c in the GNU C Library (aka     glibc or libc6) allows remote attackers to cause a     denial of service (crash) via vectors involving hostent     conversion. NOTE: this vulnerability exists because of     an incomplete fix for CVE-2013-4458.(CVE-2016-3706)In     the GNU C Library (aka glibc or libc6) through 2.29,     check_dst_limits_calc_pos_1 in posix/regexec.c has     Uncontrolled Recursion, as demonstrated by     '(|)(\\1\\1)*' in grep, a different issue than     CVE-2018-20796. NOTE: the software maintainer disputes     that this is a vulnerability because the behavior     occurs only with a crafted pattern.(CVE-2019-9192)In     the GNU C Library (aka glibc or libc6) through 2.29,     check_dst_limits_calc_pos_1 in posix/regexec.c has     Uncontrolled Recursion, as demonstrated by     '(\227|)(\\1\\1|t1|\\\2537)+' in     grep.(CVE-2018-20796)GNU Libc current is affected by:
    Re-mapping current loaded library with malicious ELF     file. The impact is: In worst case attacker may     evaluate privileges. The component is: libld. The     attack vector is: Attacker sends 2 ELF files to victim     and asks to run ldd on it. ldd execute     code.(CVE-2019-1010023)A use-after-free vulnerability     introduced in glibc upstream version 2.14 was found in     the way the tilde expansion was carried out. Directory     paths containing an initial tilde followed by a valid     username were affected by this issue. A local attacker     could exploit this flaw by creating a specially crafted     path that, when processed by the glob function, would     potentially lead to arbitrary code execution. This was     fixed in version 2.32.(CVE-2020-1752)The GNU C Library     (aka glibc or libc6) before 2.32 could overflow an     on-stack buffer during range reduction if an input to     an 80-bit long double function contains a non-canonical     bit pattern, a seen when passing a     0x5d414141414141410000 value to sinl on x86 targets.
    This is related to     sysdeps/ieee754/ldbl-96/e_rem_pio2l.c.(CVE-2020-10029)

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.

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

  - The GNU C Library (aka glibc or libc6) before 2.32     could overflow an on-stack buffer during range     reduction if an input to an 80-bit long double function     contains a non-canonical bit pattern, a seen when     passing a 0x5d414141414141410000 value to sinl on x86     targets. This is related to     sysdeps/ieee754/ldbl-96/e_rem_pio2l.c.(CVE-2020-10029)

  - A use-after-free vulnerability introduced in glibc     upstream version 2.14 was found in the way the tilde     expansion was carried out. Directory paths containing     an initial tilde followed by a valid username were     affected by this issue. A local attacker could exploit     this flaw by creating a specially crafted path that,     when processed by the glob function, would potentially     lead to arbitrary code execution. This was fixed in     version 2.32.(CVE-2020-1752)

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 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2020:4444 advisory.

    The glibc packages provide the standard C libraries (libc), POSIX thread libraries (libpthread), standard     math libraries (libm), and the name service cache daemon (nscd) used by multiple programs on the system.
    Without these libraries, the Linux system cannot function correctly.

    Security Fix(es):

    * glibc: array overflow in backtrace functions for powerpc (CVE-2020-1751)

    * glibc: use-after-free in glob() function when expanding ~user (CVE-2020-1752)

    * glibc: stack corruption from crafted input in cosl, sinl, sincosl, and tanl functions (CVE-2020-10029)

    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 8.3 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 Oracle Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the ELSA-2020-4444 advisory.

    - CVE-2020-1751: Fix an array overflow in backtrace on PowerPC. (#1813399)
    - CVE-2020-10029: Prevent stack corruption from crafted input in cosl, sinl,       sincosl, and tanl function. (#1811796)

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 CentOS Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the CESA-2020:4444 advisory.

  - glibc: stack corruption from crafted input in cosl, sinl, sincosl, and tanl functions (CVE-2020-10029)

  - glibc: array overflow in backtrace functions for powerpc (CVE-2020-1751)

  - glibc: use-after-free in glob() function when expanding ~user (CVE-2020-1752)

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 glibc installed on the remote host is prior to 2.26-37. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2023-1944 advisory.

    A vulnerability was discovered in glibc where the LD_PREFER_MAP_32BIT_EXEC environment variable is not     ignored when running binaries with the setuid flag on x86_64 architectures. This allows an attacker to     force system to utilize only half of the memory (making the system think the software is 32-bit only),     thus lowering the amount of memory being used with address space layout randomization (ASLR). The highest     threat is confidentiality although the complexity of attack is high. The affected application must already     have other vulnerabilities for this flaw to be usable. (CVE-2019-19126)

    A flaw was found in glibc in versions prior to 2.32. Pseudo-zero values are not validated causing a stack     corruption due to a stack-based overflow. The highest threat from this vulnerability is to system     availability. (CVE-2020-10029)

    A use-after-free vulnerability was found in glibc in the way the tilde expansion was carried out.
    Directory paths containing an initial tilde followed by a valid username were affected by this issue. A     local attacker could exploit this flaw by creating a specially crafted path that, when processed by the     glob function, would potentially lead to arbitrary code execution. (CVE-2020-1752)

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

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

A use-after-free vulnerability introduced in glibc upstream version 2.14 was found in the way the tilde expansion was carried out.
Directory paths containing an initial tilde followed by a valid username were affected by this issue. A local attacker could exploit this flaw by creating a specially crafted path that, when processed by the glob function, would potentially lead to arbitrary code execution.
This was fixed in version 2.32.

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

ID	Name	Product	Family	Published	Updated	Severity
135372	Fedora 30 : glibc (2020-7f625c5ea8)	Nessus	Fedora Local Security Checks	4/10/2020	3/19/2024	high
137017	EulerOS 2.0 SP5 : glibc (EulerOS-SA-2020-1599)	Nessus	Huawei Local Security Checks	6/2/2020	3/8/2024	high
138166	Ubuntu 16.04 LTS / 18.04 LTS : GNU C Library vulnerabilities (USN-4416-1)	Nessus	Ubuntu Local Security Checks	7/7/2020	9/3/2025	critical
236471	Alibaba Cloud Linux 3 : 0122: glibc (ALINUX3-SA-2022:0122)	Nessus	Alibaba Cloud Linux Local Security Checks	5/14/2025	5/14/2025	high
137509	EulerOS 2.0 SP2 : glibc (EulerOS-SA-2020-1667)	Nessus	Huawei Local Security Checks	6/17/2020	3/6/2024	high
137931	EulerOS Virtualization 3.0.6.0 : glibc (EulerOS-SA-2020-1712)	Nessus	Huawei Local Security Checks	7/1/2020	3/5/2024	high
142396	RHEL 8 : glibc (RHSA-2020:4444)	Nessus	Red Hat Local Security Checks	11/4/2020	3/6/2025	high
142780	Oracle Linux 8 : glibc (ELSA-2020-4444)	Nessus	Oracle Linux Local Security Checks	11/12/2020	11/1/2024	high
145977	CentOS 8 : glibc (CESA-2020:4444)	Nessus	CentOS Local Security Checks	2/1/2021	1/24/2024	high
171823	Amazon Linux 2 : glibc (ALAS-2023-1944)	Nessus	Amazon Linux Local Security Checks	2/23/2023	12/11/2024	high
503001	Siemens SIMATIC S7-1500 TM MFP BIOS Use After Free (CVE-2020-1752)	Tenable OT Security	Tenable.ot	2/25/2025	3/10/2025	high

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