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ubuntuUbuntuUSN-6541-2
HistoryJan 10, 2024 - 12:00 a.m.

GNU C Library regression

2024-01-1000:00:00
ubuntu.com
27
gnu c library
ubuntu 22.04 lts
vulnerability fix
nscd service
cve-2023-4806
cve-2023-4813
memory leak
denial of service
ipv6 processing

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

AI Score

7.7

Confidence

High

EPSS

0.001

Percentile

48.7%

Releases

  • Ubuntu 22.04 LTS

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 crash). This issue only affected Ubuntu 22.04 LTS and Ubuntu
23.04. (CVE-2023-5156)

Rows per page:
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CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

AI Score

7.7

Confidence

High

EPSS

0.001

Percentile

48.7%