- Vulnerability/
- USN-6541-2
USN-6541-2: GNU C Library regression
First published: Wed Jan 10 2024(Updated: )
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)
| Affected Software | Affected Version | How to fix |
|---|---|---|
| All of | ||
| ubuntu/libc-bin | <2.35-0ubuntu3.6 | 2.35-0ubuntu3.6 |
| Ubuntu | =22.04 | |
| All of | ||
| ubuntu/libc6 | <2.35-0ubuntu3.6 | 2.35-0ubuntu3.6 |
| Ubuntu | =22.04 | |
| All of | ||
| ubuntu/nscd | <2.35-0ubuntu3.6 | 2.35-0ubuntu3.6 |
| Ubuntu | =22.04 |
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Reference Links
Frequently Asked Questions
What is the severity of USN-6541-2?
USN-6541-2 addresses critical issues related to the NSCD service in Ubuntu 22.04 LTS.
How do I fix USN-6541-2?
To fix USN-6541-2, update your packages to version 2.35-0ubuntu3.6 for libc-bin, libc6, and nscd.
Which Ubuntu versions are affected by USN-6541-2?
USN-6541-2 affects Ubuntu 22.04 LTS.
What vulnerabilities does USN-6541-2 address?
USN-6541-2 addresses issues introduced while fixing CVE-2023-4806 in the NSCD service IPv6 processing.
Is a restart required after applying the fix for USN-6541-2?
Yes, a restart may be required to ensure that the services using the updated libraries are refreshed.
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