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Ubuntu 23.10 USN-6736-1 Critical: Klibc Buffer Overflow Threat

ubuntu
Calendar Grey April 16, 2024
Dist Ubuntu Esm H88
Numerous updates addressing vulnerabilities in klibc for different Ubuntu versions enhance overall system reliability and reduce the risk of potential threats.
Several security issues were fixed in klibc.

Summary

Several security issues were fixed in klibc.

Software Description:

- 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)

Topics%20covered

Topics Covered

security advisory buffer overflow critical Ubuntu attack system updates klibc

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 23.10:
   klibc-utils                    2.0.13-1ubuntu0.1
   libklibc                        2.0.13-1ubuntu0.1

Ubuntu 22.04 LTS:
   klibc-utils                    2.0.10-4ubuntu0.1
   libklibc                        2.0.10-4ubuntu0.1

Ubuntu 20.04 LTS:
   klibc-utils                    2.0.7-1ubuntu5.2
   libklibc                        2.0.7-1ubuntu5.2

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   klibc-utils                    2.0.4-9ubuntu2.2+esm1
   libklibc                        2.0.4-9ubuntu2.2+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
   klibc-utils                    2.0.4-8ubuntu1.16.04.4+esm2
   libklibc                        2.0.4-8ubuntu1.16.04.4+esm2

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
   klibc-utils                    2.0.3-0ubuntu1.14.04.3+esm3
   libklibc                        2.0.3-0ubuntu1.14.04.3+esm3

In general, a standard system update will make all the necessary changes.

References

  https://ubuntu.com/security/notices/USN-6736-1

  CVE-2016-9840, CVE-2016-9841, CVE-2018-25032, CVE-2022-37434

Severity
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Ubuntu Security Notice USN-6736-1

Topics%20covered

Topics Covered

security advisory buffer overflow critical Ubuntu attack system updates klibc

Package Information

 
 
 

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