Original release date:03/13/2012
Last revised:03/13/2012
Source: US-CERT/NIST
Overview
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.
Impact
CVSS Severity (version 2.0):
CVSS v2 Base Score:5.0 (MEDIUM)(AV:N/AC:L/Au:N/C:P/I:N/A:N) (legend)
Impact Subscore: 2.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type:Allows unauthorized disclosure of information
References to Advisories, Solutions, and Tools
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External Source: CONFIRM
Name: http://www.openssl.org/news/secadv_20120312.txt
Type: Advisory
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