USN-5651-2: strongSwan vulnerability
3 October 2022
strongSwan could be made do denial of service if it received a specially crafted certificate.
- strongswan - IPsec VPN solution
USN-5651-1 fixed a vulnerability in strongSwan. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.
Original advisory details:
Lahav Schlesinger discovered that strongSwan incorrectly handled certain OCSP URIs and
and CRL distribution points (CDP) in certificates. A remote attacker could
possibly use this issue to initiate IKE_SAs and send crafted certificates
that contain URIs pointing to servers under their control, which can lead
to a denial-of-service attack.
The problem can be corrected by updating your system to the following package versions:
In general, a standard system update will make all the necessary changes.
- USN-5651-1: charon-systemd, strongswan-scepclient, strongswan-tnc-ifmap, strongswan, strongswan-pki, libstrongswan-standard-plugins, libstrongswan, strongswan-tnc-server, libstrongswan-extra-plugins, strongswan-tnc-base, strongswan-tnc-pdp, strongswan-charon, strongswan-starter, libcharon-extauth-plugins, libcharon-standard-plugins, strongswan-libcharon, strongswan-nm, strongswan-tnc-client, charon-cmd, libcharon-extra-plugins, strongswan-swanctl