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osvGoogleOSV:DSA-2665-1
HistoryApr 30, 2013 - 12:00 a.m.

strongswan - authentication bypass

2013-04-3000:00:00
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osv.dev
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88.2%

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.