Google Chrome before 2.0.172.43 does not prevent SSL connections to a site with an X.509 certificate signed with the (1) MD2 or (2) MD4 algorithm, which makes it easier for man-in-the-middle attackers to spoof arbitrary HTTPS servers via a crafted certificate, a related issue to CVE-2009-2409.

The Network Security Services (NSS) library before 3.12.3, as used in Firefox; GnuTLS before 2.6.4 and 2.7.4; OpenSSL 0.9.8 through 0.9.8k; and other products support MD2 with X.509 certificates, which might allow remote attackers to spoof certificates by using MD2 design flaws to generate a hash collision in less than brute-force time. NOTE: the scope of this issue is currently limited because the amount of computation required is still large.