It was discovered that the libreswan IPsec implementation could be forced into a crash/restart via malformed IKEv2 packets after peer authentication, resulting in denial of service. For the stable distribution (bullseye), this problem has been fixed in version 4.3-1+deb11u3. We recommend that you upgrade your libreswan packages. For the detailed security status of libreswan please refer to its security tracker page at: https://security-tracker.debian.org/tracker/libreswan
It was discovered that the libreswan IPsec implementation could be forced into a crash/restart via malformed IKEv2 packets after peer authentication, resulting in denial of service.
For the stable distribution (bullseye), this problem has been fixed in version 4.3-1+deb11u3.
We recommend that you upgrade your libreswan packages.
For the detailed security status of libreswan please refer to its security tracker page at: https://security-tracker.debian.org/tracker/libreswan