GNU C Library: CVSS (Max): 9.8
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AUSCERT External Security Bulletin Redistribution
ESB-2024.2784
USN-6762-1: GNU C Library vulnerabilities
3 May 2024
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AusCERT Security Bulletin Summary
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Product: GNU C Library
Publisher: Ubuntu
Operating System: Ubuntu
Resolution: Patch/Upgrade
CVE Names: CVE-2018-11236 CVE-2024-2961 CVE-2021-3999
CVE-2014-9984 CVE-2015-20109
Original Bulletin:
https://ubuntu.com/security/notices/USN-6762-1
Comment: CVSS (Max): 9.8 CVE-2018-11236 (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
CVSS Source: Red Hat, [Ubuntu]
Calculator: https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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USN-6762-1: GNU C Library vulnerabilities
2 May 2024
Several security issues were fixed in GNU C Library.
Releases
o Ubuntu 18.04 ESM
o Ubuntu 16.04 ESM
o Ubuntu 14.04 ESM
Packages
o eglibc – GNU C Library
o glibc – GNU C Library
Details
It was discovered that GNU C Library incorrectly handled netgroup requests.
An attacker could possibly use this issue to cause a crash or execute arbitrary
code.
This issue only affected Ubuntu 14.04 LTS. ( CVE-2014-9984 )
It was discovered that GNU C Library might allow context-dependent
attackers to cause a denial of service. This issue only affected Ubuntu 14.04
LTS.
( CVE-2015-20109 )
It was discovered that GNU C Library when processing very long pathname
arguments to
the realpath function, could encounter an integer overflow on 32-bit
architectures, leading to a stack-based buffer overflow and, potentially,
arbitrary code execution. This issue only affected Ubuntu 14.04 LTS.
( CVE-2018-11236 )
It was discovered that the GNU C library getcwd function incorrectly
handled buffers. An 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 14.04 LTS. ( CVE-2021-3999 )
Charles Fol discovered that the GNU C Library iconv feature incorrectly
handled certain input sequences. An 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-2024-2961 )
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 18.04
o libc6 – 2.27-3ubuntu1.6+esm2
Available with Ubuntu Pro
Ubuntu 16.04
o libc6 – 2.23-0ubuntu11.3+esm6
Available with Ubuntu Pro
Ubuntu 14.04
o libc6 – 2.19-0ubuntu6.15+esm3
Available with Ubuntu Pro
After a standard system update you need to reboot your computer to make
all the necessary changes.
References
o CVE-2024-2961
o CVE-2021-3999
o CVE-2014-9984
o CVE-2018-11236
o CVE-2015-20109
o https://launchpad.net/bugs/2063328
Related notices
o USN-6737-1 : libc6-dev-x32, libc6-amd64, libc-bin, glibc, libc6-i386,
libc6-lse, libc6-dev-armel, libc6-pic, libc6-prof, glibc-source,
libc6-dev-amd64, libc6-s390, libc6-x32, libc6-dev-i386, glibc-doc,
libc6-armel, nscd, locales-all, libc6-dev, libc-dev-bin, locales,
libc-devtools, libc6, libc6-dev-s390
o USN-6737-2 : libc6-dev-x32, libc6-amd64, libc-bin, glibc, libc6-i386,
glibc-source, libc6-dev-amd64, libc6-s390, libc6-x32, libc6-dev-i386,
glibc-doc, nscd, locales-all, libc6-dev, libc-dev-bin, locales,
libc-devtools, libc6, libc6-dev-s390
o USN-5310-1 : libc6-dev-x32, libc6-amd64, libc-bin, glibc, libc6-i386,
libc6-lse, libc6-dev-armel, libc6-pic, libc6-prof, glibc-source,
libc6-dev-amd64, libc6-s390, libc6-x32, libc6-dev-i386, glibc-doc,
multiarch-support, libc6-armel, nscd, locales-all, libc6-dev, libc-dev-bin,
locales, libc-devtools, libc6, libc6-dev-s390
o USN-5310-2 : libc6-dev-x32, libc6-amd64, libc-bin, glibc, libc6-i386,
libc6-dev-armel, libc6-pic, glibc-source, libc6-dev-amd64, libc6-s390,
libc6-x32, libc6-dev-i386, glibc-doc, multiarch-support, libc6-armel, nscd,
locales-all, libc6-dev, libc-dev-bin, locales, libc6, libc6-dev-s390
o USN-4416-1 : libc6-dev-x32, libc6-amd64, libc-bin, glibc, libc6-i386,
libc6-dev-ppc64, libc6-dev-armel, libc6-pic, glibc-source, libc6-dev-amd64,
libc6-s390, libc6-x32, libc6-dev-i386, glibc-doc, multiarch-support,
libc6-armel, nscd, locales-all, libc6-ppc64, libc6-dev, libc-dev-bin,
locales, libc6-udeb, libc6, libc6-dev-s390
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