|The BN_GF2m_mod_inv function in crypto/bn/bn_gf2m.c in OpenSSL before
0.9.8s, 1.0.0 before 1.0.0e, 1.0.1 before 1.0.1n, and 1.0.2 before
1.0.2b does not properly handle ECParameters structures in which the
curve is over a malformed binary polynomial field, which allows remote
attackers to cause a denial of service (infinite loop) via a session
that uses an Elliptic Curve algorithm, as demonstrated by an attack
against a server that supports client authentication.