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Ubuntu 23.04 USN-6541-1: Critical glibc memory issues leading to DoS

ubuntu
Calendar Grey December 7, 2023
Dist Ubuntu Esm H88
Numerous security flaws in the GNU C Library have been addressed in various versions of Ubuntu. Ensure your system is updated to maintain its security.
Several security issues were fixed in GNU C Library.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 23.04 - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS (Available with Ubuntu Pro) - Ubuntu 16.04 LTS (Available with Ubuntu Pro) Summary: Several security issues were fixed in GNU C Library. Software Description: - glibc: GNU C Library 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 23.04. (CVE-2023-5156)

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu glibc memory issue

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 23.04: libc-bin 2.37-0ubuntu2.2 libc6 2.37-0ubuntu2.2 Ubuntu 22.04 LTS: libc-bin 2.35-0ubuntu3.5 libc6 2.35-0ubuntu3.5 Ubuntu 20.04 LTS: libc-bin 2.31-0ubuntu9.14 libc6 2.31-0ubuntu9.14 Ubuntu 18.04 LTS (Available with Ubuntu Pro): libc-bin 2.27-3ubuntu1.6+esm1 libc6 2.27-3ubuntu1.6+esm1 Ubuntu 16.04 LTS (Available with Ubuntu Pro): libc-bin 2.23-0ubuntu11.3+esm5 libc6 2.23-0ubuntu11.3+esm5 After a standard system update you need to reboot your computer to make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-6541-1

CVE-2023-4806, CVE-2023-4813, CVE-2023-5156

Severity
critical
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Low
Medium
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Critical

Ubuntu Security Notice USN-6541-1

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu glibc memory issue

Package Information

https://launchpad.net/ubuntu/+source/glibc/2.37-0ubuntu2.2 https://launchpad.net/ubuntu/+source/glibc/2.35-0ubuntu3.5 https://launchpad.net/ubuntu/+source/glibc/2.31-0ubuntu9.14

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