USN-5570-2: zlib vulnerability

Releases

• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS

Packages

• zlib - Lossless data-compression library

Details

USN-5570-1 fixed a vulnerability in zlib. This update provides the
corresponding update for Ubuntu 22.04 LTS and Ubuntu 20.04 LTS.

Original advisory details:

Evgeny Legerov discovered that zlib incorrectly handled memory when
performing certain inflate operations. An attacker could use this issue
to cause zlib to crash, resulting in a denial of service, or possibly
execute arbitrary code.

Update instructions

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

Ubuntu 22.04

• lib64z1 - 1:1.2.11.dfsg-2ubuntu9.2
• libx32z1 - 1:1.2.11.dfsg-2ubuntu9.2
• lib32z1 - 1:1.2.11.dfsg-2ubuntu9.2
• zlib1g - 1:1.2.11.dfsg-2ubuntu9.2

Ubuntu 20.04

• lib64z1 - 1:1.2.11.dfsg-2ubuntu1.5
• libx32z1 - 1:1.2.11.dfsg-2ubuntu1.5
• lib32z1 - 1:1.2.11.dfsg-2ubuntu1.5
• zlib1g - 1:1.2.11.dfsg-2ubuntu1.5

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

References

• CVE-2022-37434

Related notices

• USN-5570-1: zlib, lib32z1-dev, lib64z1-dev, libx32z1-dev, lib64z1, zlib1g-dev, zlib1g, lib32z1, zlib-bin, libx32z1
• USN-5573-1: rsync
• USN-6736-1: libklibc, klibc, libklibc-dev, klibc-utils
• USN-6736-2: libklibc, klibc, libklibc-dev, klibc-utils