1. Ubuntu Security Notices
  2. USN-6736-2

USN-6736-2: klibc vulnerabilities

Publication date

23 May 2024

Overview

Several security issues were fixed in klibc.

Releases

Packages

  • klibc - small utilities built with klibc for early boot

Details

USN-6736-1 fixed vulnerabilities in klibc. This update provides the
corresponding updates for Ubuntu 24.04 LTS.

Original advisory details:

It was discovered that zlib, vendored in klibc, incorrectly handled pointer
arithmetic. An attacker could use this issue to cause klibc to crash or to
possibly execute arbitrary code. (CVE-2016-9840, CVE-2016-9841)

Danilo Ramos discovered that zlib, vendored in klibc, incorrectly handled
memory when performing certain deflating operations. An attacker could use
this issue to cause klibc to crash or to possibly execute arbitrary code.
(CVE-2018-25032)

Evgeny Legerov discovered that zlib, vendored in klibc, incorrectly handled
memory when performing certain inflate operations. An attacker could use
this issue to cause klibc to crash or to possibly execute arbitrary...

USN-6736-1 fixed vulnerabilities in klibc. This update provides the
corresponding updates for Ubuntu 24.04 LTS.

Original advisory details:

It was discovered that zlib, vendored in klibc, incorrectly handled pointer
arithmetic. An attacker could use this issue to cause klibc to crash or to
possibly execute arbitrary code. (CVE-2016-9840, CVE-2016-9841)

Danilo Ramos discovered that zlib, vendored in klibc, incorrectly handled
memory when performing certain deflating operations. An attacker could use
this issue to cause klibc to crash or to possibly execute arbitrary code.
(CVE-2018-25032)

Evgeny Legerov discovered that zlib, vendored in klibc, incorrectly handled
memory when performing certain inflate operations. An attacker could use
this issue to cause klibc to crash or to possibly execute arbitrary code.
(CVE-2022-37434)

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
24.04 noble klibc-utils –  2.0.13-4ubuntu0.1
libklibc –  2.0.13-4ubuntu0.1

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References

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