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

USN-6736-1: klibc vulnerabilities

Publication date

16 April 2024

Overview

Several security issues were fixed in klibc.

Releases

Packages

  • klibc - small utilities built with klibc for early boot

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)

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
23.10 mantic klibc-utils –  2.0.13-1ubuntu0.1
libklibc –  2.0.13-1ubuntu0.1
22.04 jammy klibc-utils –  2.0.10-4ubuntu0.1
libklibc –  2.0.10-4ubuntu0.1
20.04 focal klibc-utils –  2.0.7-1ubuntu5.2
libklibc –  2.0.7-1ubuntu5.2
18.04 bionic klibc-utils –  2.0.4-9ubuntu2.2+esm1  
libklibc –  2.0.4-9ubuntu2.2+esm1  
16.04 xenial klibc-utils –  2.0.4-8ubuntu1.16.04.4+esm2  
libklibc –  2.0.4-8ubuntu1.16.04.4+esm2  
14.04 trusty klibc-utils –  2.0.3-0ubuntu1.14.04.3+esm3  
libklibc –  2.0.3-0ubuntu1.14.04.3+esm3  

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References

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