USN-6488-2: strongSwan vulnerability

Publication date

14 December 2023

Overview

strongSwan could be made to crash or run programs if it received specially crafted network traffic.


Packages

Details

USN-6488-1 fixed a vulnerability in strongSwan. This update provides
the corresponding updates for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.

Original advisory details:

Florian Picca discovered that strongSwan incorrectly handled certain DH
public values. A remote attacker could use this issue to cause strongSwan
to crash, resulting in a denial of service, or possibly execute arbitrary
code.

USN-6488-1 fixed a vulnerability in strongSwan. This update provides
the corresponding updates for Ubuntu 16.04 LTS and Ubuntu 18.04 LTS.

Original advisory details:

Florian Picca discovered that strongSwan incorrectly handled certain DH
public values. A remote attacker could use this issue to cause strongSwan
to crash, resulting in a denial of service, or possibly execute arbitrary
code.

Update instructions

In general, a standard system update will 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
18.04 bionic libstrongswan –  5.6.2-1ubuntu2.9+esm1  
strongswan –  5.6.2-1ubuntu2.9+esm1  
16.04 xenial libstrongswan –  5.3.5-1ubuntu3.8+esm4  
strongswan –  5.3.5-1ubuntu3.8+esm4  

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