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Ubuntu Security Notice USN-6402-1
October 02, 2023
libtommath vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 23.04
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)
Summary:
LibTomMatch could be made to execute arbitrary code or
denial of service if it received a specially crafted input.
Software Description:
- libtommath: multiple-precision integer library [development files]
Details:
It was discovered that LibTomMath incorrectly handled certain inputs.
An attacker could possibly use this issue to execute arbitrary code
and cause a denial of service (DoS).
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 23.04:
  libtommath1                     1.2.0-6ubuntu0.23.04.1
Ubuntu 22.04 LTS:
  libtommath1                     1.2.0-6ubuntu0.22.04.1
Ubuntu 20.04 LTS:
  libtommath1                     1.2.0-3ubuntu0.1
Ubuntu 18.04 LTS (Available with Ubuntu Pro):
  libtommath1                     1.0.1-1ubuntu0.1~esm1
Ubuntu 16.04 LTS (Available with Ubuntu Pro):
  libtommath0                     0.42.0-1.2ubuntu0.1~esm1
In general, a standard system update will make all the necessary changes.
References:
  https://ubuntu.com/security/notices/USN-6402-1
  CVE-2023-36328
Package Information:
  https://launchpad.net/ubuntu/+source/libtommath/1.2.0-6ubuntu0.23.04.1
  https://launchpad.net/ubuntu/+source/libtommath/1.2.0-6ubuntu0.22.04.1
  https://launchpad.net/ubuntu/+source/libtommath/1.2.0-3ubuntu0.1