strongswan -- authentication bypass

2013-04-30T00:00:00
ID DSA-2665
Type debian
Reporter Debian
Modified 2013-04-30T00:00:00

Description

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.