Ubuntu Security Notice USN-5570-1

Ubuntu Security Notice USN-5570-1
August 17, 2022

zlib vulnerability

A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 18.04 LTS
– Ubuntu 16.04 ESM
– Ubuntu 14.04 ESM


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

Software Description:
– zlib: Lossless data-compression library


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 18.04 LTS:
lib32z1 1:1.2.11.dfsg-0ubuntu2.2
lib64z1 1:1.2.11.dfsg-0ubuntu2.2
libx32z1 1:1.2.11.dfsg-0ubuntu2.2
zlib1g 1:1.2.11.dfsg-0ubuntu2.2

Ubuntu 16.04 ESM:
lib32z1 1:1.2.8.dfsg-2ubuntu4.3+esm2
lib64z1 1:1.2.8.dfsg-2ubuntu4.3+esm2
libx32z1 1:1.2.8.dfsg-2ubuntu4.3+esm2
zlib1g 1:1.2.8.dfsg-2ubuntu4.3+esm2

Ubuntu 14.04 ESM:
lib32z1 1:1.2.8.dfsg-1ubuntu1.1+esm2
lib64z1 1:1.2.8.dfsg-1ubuntu1.1+esm2
libx32z1 1:1.2.8.dfsg-1ubuntu1.1+esm2
zlib-bin 1:1.2.8.dfsg-1ubuntu1.1+esm2
zlib1g 1:1.2.8.dfsg-1ubuntu1.1+esm2

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


Package Information: