CVE-2011-1945: OpenSSL

Low severity, CVSS 2.6. EPSS: 3.3% chance of exploitation in the next 30 days.

The elliptic curve cryptography (ECC) subsystem in OpenSSL 1.0.0d and earlier, when the Elliptic Curve Digital Signature Algorithm (ECDSA) is used for the ECDHE_ECDSA cipher suite, does not properly implement curves over binary fields, which makes it easier for context-dependent attackers to determine private keys via a timing attack and a lattice calculation.

Affected products

• OpenSSL OpenSSL: up to and including 1.0.0d; version 0.9.1c only; version 0.9.2b only; version 0.9.3 only; version 0.9.3a only; version 0.9.4 only; …

Published 2011-05-31. Last modified 2026-06-16.