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USN-5570-2: zlib vulnerability

17 October 2022

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

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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.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

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

Ubuntu 22.04
Ubuntu 20.04

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

References

Related notices

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