USN-5111-2: strongSwan vulnerability
19 October 2021
Several security issues were fixed in strongSwan.
- strongswan - IPsec VPN solution
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)
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-5111-1: libcharon-extauth-plugins, strongswan-charon, libstrongswan, strongswan-tnc-base, strongswan-tnc-client, strongswan-tnc-ifmap, strongswan-starter, strongswan-tnc-server, strongswan-libcharon, strongswan-pki, strongswan-nm, strongswan, libstrongswan-extra-plugins, charon-cmd, charon-systemd, libstrongswan-standard-plugins, strongswan-scepclient, libcharon-standard-plugins, strongswan-swanctl, strongswan-tnc-pdp, libcharon-extra-plugins