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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

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
Lowest
Low
Medium
High
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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