strongswan - authentication bypass

Kevin Wojtysiak discovered a vulnerability in strongSwan, an IPsec
based VPN solution.

When using the OpenSSL plugin for ECDSA based authentication, an empty,
zeroed or otherwise invalid signature is handled as a legitimate one.
An attacker could use a forged signature to authenticate like a legitimate
user and gain access to the VPN (and everything protected by this).

While the issue looks like CVE-2012-2388
(RSA signature based authentication bypass), it is unrelated.

For the stable distribution (squeeze), this problem has been fixed in
version 4.4.1-5.3.

For the testing distribution (wheezy), this problem has been fixed in
version 4.5.2-1.5+deb7u1.

For the unstable distribution (sid), this problem has been fixed in
version 4.6.4-7.

We recommend that you upgrade your strongswan packages.