Ubuntu 12.04 LTS / 12.10 : openssl vulnerability (USN-1732-3)

Ubuntu Security Notice (C) 2013 Canonical, Inc. / NASL script (C) 2013-2014 Tenable Network Security, Inc.


Synopsis :

The remote Ubuntu host is missing a security-related patch.

Description :

USN-1732-1 fixed vulnerabilities in OpenSSL. The fix for CVE-2013-0169
and CVE-2012-2686 was reverted in USN-1732-2 because of a regression.
This update restores the security fix, and includes an extra fix from
upstream to address the AES-NI regression. We apologize for the
inconvenience.

Adam Langley and Wolfgang Ettlingers discovered that OpenSSL
incorrectly handled certain crafted CBC data when used with AES-NI. A
remote attacker could use this issue to cause OpenSSL to crash,
resulting in a denial of service. This issue only affected Ubuntu
12.04 LTS and Ubuntu 12.10. (CVE-2012-2686)

Nadhem Alfardan and Kenny Paterson discovered that the TLS
protocol as used in OpenSSL was vulnerable to a timing
side-channel attack known as the 'Lucky Thirteen' issue. A
remote attacker could use this issue to perform
plaintext-recovery attacks via analysis of timing data.
(CVE-2013-0169).

Solution :

Update the affected libssl1.0.0 package.

Risk factor :

Medium / CVSS Base Score : 5.0
(CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:P)
CVSS Temporal Score : 4.3
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : true

Family: Ubuntu Local Security Checks

Nessus Plugin ID: 65684 ()

Bugtraq ID: 57778

CVE ID: CVE-2012-2686
CVE-2013-0169