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USN-5250-2: strongSwan vulnerability

24 January 2022

strongSwan could crash or allow unintended access to network services.




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

The problem can be corrected by updating your system to the following package versions:

Ubuntu 16.04
Ubuntu 14.04

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


Related notices

  • USN-5250-1: strongswan-nm, strongswan-scepclient, strongswan-swanctl, strongswan-tnc-base, libcharon-extra-plugins, libstrongswan-extra-plugins, charon-systemd, strongswan-libcharon, libstrongswan-standard-plugins, strongswan-tnc-ifmap, strongswan-charon, strongswan-starter, charon-cmd, strongswan-tnc-pdp, libcharon-extauth-plugins, strongswan-tnc-client, libcharon-standard-plugins, strongswan-tnc-server, strongswan, strongswan-pki, libstrongswan