1. Ubuntu Security Notices
  2. USN-5355-2

USN-5355-2: zlib vulnerability

Publication date

30 March 2022

Overview

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

Releases

Packages

  • zlib - compression library - 32 bit runtime

Details

USN-5355-1 fixed a vulnerability in zlib. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

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

USN-5355-1 fixed a vulnerability in zlib. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

Danilo Ramos discovered that zlib incorrectly handled memory when
performing certain deflating 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

After a standard system update you need to reboot your computer to 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
16.04 xenial lib64z1 –  1:1.2.8.dfsg-2ubuntu4.3+esm1  
libx32z1 –  1:1.2.8.dfsg-2ubuntu4.3+esm1  
lib32z1 –  1:1.2.8.dfsg-2ubuntu4.3+esm1  
zlib1g –  1:1.2.8.dfsg-2ubuntu4.3+esm1  
14.04 trusty lib64z1 –  1:1.2.8.dfsg-1ubuntu1.1+esm1  
libx32z1 –  1:1.2.8.dfsg-1ubuntu1.1+esm1  
lib32z1 –  1:1.2.8.dfsg-1ubuntu1.1+esm1  
zlib1g –  1:1.2.8.dfsg-1ubuntu1.1+esm1  

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References

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