CVE-2015-1788: OpenSSL

Medium severity, CVSS 4.3. EPSS: 24.3% chance of exploitation in the next 30 days.

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.

Affected products

• OpenSSL OpenSSL: up to and including 0.9.8zf; version 1.0.0 only; version 1.0.0a only; version 1.0.0b only; version 1.0.0c only; version 1.0.0d only; …

Published 2015-06-12. Last modified 2026-06-17.