[USN-6402-1] LibTomMath vulnerability

Leonidas S. Barbosa leo.barbosa at canonical.com
Mon Oct 2 16:22:01 UTC 2023

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)


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]


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.


Package Information:

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