CVE-2012-0884: OpenSSL

Medium severity, CVSS 5.0. EPSS: 13.7% chance of exploitation in the next 30 days.

The implementation of Cryptographic Message Syntax (CMS) and PKCS #7 in OpenSSL before 0.9.8u and 1.x before 1.0.0h does not properly restrict certain oracle behavior, which makes it easier for context-dependent attackers to decrypt data via a Million Message Attack (MMA) adaptive chosen ciphertext attack.

Affected products

• OpenSSL OpenSSL: up to and including 0.9.8t; version 0.9.0b only; version 0.9.1b only; version 0.9.1c only; version 0.9.2b only; version 0.9.3 only; …

Published 2012-03-13. Last modified 2026-06-16.