USN-6762-1: GNU C Library vulnerabilities
2 May 2024
Several security issues were fixed in GNU C Library.
Releases
Packages
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
-
libc6
-
2.27-3ubuntu1.6+esm2
Available with Ubuntu Pro
Ubuntu 16.04
-
libc6
-
2.23-0ubuntu11.3+esm6
Available with Ubuntu Pro
Ubuntu 14.04
-
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.