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==========================================================================
Ubuntu Security Notice USN-1732-3
March 25, 2013

openssl vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 12.10
- Ubuntu 12.04 LTS

Summary:

Several security issues were fixed in OpenSSL.

Software Description:
- openssl: Secure Socket Layer (SSL) cryptographic library and tools

Details:

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.

Original advisory details:

 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)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 12.10:
  libssl1.0.0                     1.0.1c-3ubuntu2.3

Ubuntu 12.04 LTS:
  libssl1.0.0                     1.0.1-4ubuntu5.8

After a standard system update you need to reboot your computer to make
all the necessary changes.

References:
  http://www.ubuntu.com/usn/usn-1732-3
  http://www.ubuntu.com/usn/usn-1732-1
  CVE-2013-0169

Package Information:
  https://launchpad.net/ubuntu/+source/openssl/1.0.1c-3ubuntu2.3
  https://launchpad.net/ubuntu/+source/openssl/1.0.1-4ubuntu5.8



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