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Ubuntu Security Notice USN-6541-2
January 10, 2024
glibc regression
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 22.04 LTS
Summary:
USN-6541-1 introduced a regression in the GNU C Library.
Software Description:
- glibc: GNU C Library
Details:
USN-6541-1 fixed vulnerabilities in the GNU C Library. Unfortunately,
changes made to allow proper application of the fix for CVE-2023-4806 in
Ubuntu 22.04 LTS introduced an issue in the NSCD service IPv6 processing
functionalities. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
It was discovered that the GNU C Library was not properly handling certain
memory operations. An attacker could possibly use this issue to cause a
denial of service (application crash). (CVE-2023-4806, CVE-2023-4813)
It was discovered that the GNU C library was not properly implementing a
fix for CVE-2023-4806 in certain cases, which could lead to a memory leak.
An attacker could possibly use this issue to cause a denial of service
(application crash). This issue only affected Ubuntu 22.04 LTS and Ubuntu
23.04. (CVE-2023-5156)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 22.04 LTS:
libc-bin 2.35-0ubuntu3.6
libc6 2.35-0ubuntu3.6
nscd 2.35-0ubuntu3.6
In general, a standard system update will make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-6541-2
https://ubuntu.com/security/notices/USN-6541-1
https://launchpad.net/bugs/2047155
Package Information:
https://launchpad.net/ubuntu/+source/glibc/2.35-0ubuntu3.6