USN-5111-2: strongSwan vulnerability
19 October 2021
Several security issues were fixed in strongSwan.
Releases
Packages
- strongswan - IPsec VPN solution
Details
USN-5111-1 fixed a vulnerability in strongSwan. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.
Original advisory details:
It was discovered that strongSwan incorrectly handled replacing
certificates in the cache. A remote attacker could use this issue to cause
strongSwan to crash, resulting in a denial of service, or possibly execute
arbitrary code. (CVE-2021-41991)
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 16.04
-
libstrongswan
-
5.3.5-1ubuntu3.8+esm1
Available with Ubuntu Pro
-
strongswan
-
5.3.5-1ubuntu3.8+esm1
Available with Ubuntu Pro
Ubuntu 14.04
-
libstrongswan
-
5.1.2-0ubuntu2.11+esm1
Available with Ubuntu Pro
-
strongswan
-
5.1.2-0ubuntu2.11+esm1
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References
Related notices
- USN-5111-1: strongswan-tnc-client, strongswan, strongswan-libcharon, strongswan-charon, libcharon-extauth-plugins, libstrongswan-standard-plugins, strongswan-tnc-base, libcharon-standard-plugins, libstrongswan-extra-plugins, libcharon-extra-plugins, strongswan-tnc-pdp, charon-cmd, charon-systemd, strongswan-tnc-server, strongswan-nm, strongswan-swanctl, strongswan-pki, strongswan-starter, strongswan-scepclient, strongswan-tnc-ifmap, libstrongswan