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Ubuntu Security Notice USN-6402-2
November 27, 2023

libtommath vulnerability

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

• Ubuntu 23.10

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:

USN-6402-1 fixed vulnerabilities in LibTomMath. This update
provides the corresponding updates for Ubuntu 23.10.

Original advisory 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 23.10:
libtommath1 1.2.0-6ubuntu0.23.10.1

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

References:
https://ubuntu.com/security/notices/USN-6402-2
https://ubuntu.com/security/notices/USN-6402-1
CVE-2023-36328

Package Information:
https://launchpad.net/ubuntu/+source/libtommath/1.2.0-6ubuntu0.23.10.1