1. Ubuntu Security Notices
  2. USN-5570-2

USN-5570-2: zlib vulnerability

Publication date

17 October 2022

Overview

zlib could be made to crash or run programs if it received specially crafted input.

Releases

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.

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

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
22.04 jammy 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
20.04 focal 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

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References

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