1. Ubuntu Security Notices
  2. USN-5250-2

USN-5250-2: strongSwan vulnerability

Publication date

24 January 2022

Overview

strongSwan could crash or allow unintended access to network services.

Releases

Packages

Details

USN-5250-1 fixed a vulnerability in strongSwan. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

Zhuowei Zhang discovered that stringSwan incorrectly handled EAP
authentication. A remote attacker could use this issue to cause strongSwan
to crash, resulting in a denial of service, or possibly bypass client and
server authentication.

USN-5250-1 fixed a vulnerability in strongSwan. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.

Original advisory details:

Zhuowei Zhang discovered that stringSwan incorrectly handled EAP
authentication. A remote attacker could use this issue to cause strongSwan
to crash, resulting in a denial of service, or possibly bypass client and
server authentication.

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
16.04 xenial libstrongswan –  5.3.5-1ubuntu3.8+esm2  
strongswan –  5.3.5-1ubuntu3.8+esm2  
14.04 trusty libstrongswan –  5.1.2-0ubuntu2.11+esm2  
strongswan –  5.1.2-0ubuntu2.11+esm2  

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References

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