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RHSA-2012:0426: openssl security and bug fix update

Severity CVSS Published Added Modified
5 (AV:N/AC:L/Au:N/C:N/I:N/A:P) March 15, 2012 March 30, 2012 July 04, 2017


OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL v2/v3)and Transport Layer Security (TLS v1) protocols, as well as afull-strength, general purpose cryptography library.A NULL pointer dereference flaw was found in the way OpenSSL parsedSecure/Multipurpose Internet Mail Extensions (S/MIME) messages. An attackercould use this flaw to crash an application that uses OpenSSL to decrypt orverify S/MIME messages. (CVE-2012-1165)A flaw was found in the PKCS#7 and Cryptographic Message Syntax (CMS)implementations in OpenSSL. An attacker could possibly use this flaw toperform a Bleichenbacher attack to decrypt an encrypted CMS, PKCS#7, orS/MIME message by sending a large number of chosen ciphertext messages toa service using OpenSSL and measuring error response times. (CVE-2012-0884)This update also fixes a regression caused by the fix for CVE-2011-4619,released via RHSA-2012:0060 and RHSA-2012:0059, which caused Server GatedCryptography (SGC) handshakes to fail.All OpenSSL users should upgrade to these updated packages, which containbackported patches to resolve these issues. For the update to take effect,all services linked to the OpenSSL library must be restarted, or the systemrebooted.

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