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.

mdeslaur