USN-5651-2: strongSwan vulnerability
3 October 2022
strongSwan could be made do denial of service if it received a specially crafted certificate.
Releases
Packages
- strongswan - IPsec VPN solution
Details
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.
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 16.04
-
strongswan
-
5.3.5-1ubuntu3.8+esm3
Available with Ubuntu Pro
-
libstrongswan
-
5.3.5-1ubuntu3.8+esm3
Available with Ubuntu Pro
Ubuntu 14.04
-
strongswan
-
5.1.2-0ubuntu2.11+esm3
Available with Ubuntu Pro
-
libstrongswan
-
5.1.2-0ubuntu2.11+esm3
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References
Related notices
- USN-5651-1: strongswan-tnc-pdp, libcharon-extra-plugins, charon-cmd, strongswan-libcharon, strongswan-starter, strongswan-tnc-base, strongswan-tnc-server, libstrongswan, libcharon-extauth-plugins, strongswan-nm, strongswan-tnc-ifmap, libstrongswan-extra-plugins, strongswan-tnc-client, strongswan, strongswan-charon, charon-systemd, strongswan-swanctl, libcharon-standard-plugins, strongswan-scepclient, strongswan-pki, libstrongswan-standard-plugins