USN-6541-2: GNU C Library regression
Publication date
10 January 2024
Overview
USN-6541-1 introduced a regression in the GNU C Library.
Releases
Packages
- 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...
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
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 22.04 jammy | libc-bin – 2.35-0ubuntu3.6 | ||
| libc6 – 2.35-0ubuntu3.6 | |||
| nscd – 2.35-0ubuntu3.6 | |||
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