USN-1732-1: OpenSSL vulnerabilities

21 February 2013

Several security issues were fixed in OpenSSL.

Releases

Packages

  • openssl - Secure Socket Layer (SSL) cryptographic library and tools

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)

Stephen Henson discovered that OpenSSL incorrectly performed signature
verification for OCSP responses. A remote attacker could use this issue to
cause OpenSSL to crash, resulting in a denial of service. (CVE-2013-0166)

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 8.04
Ubuntu 12.10
Ubuntu 12.04
Ubuntu 11.10
Ubuntu 10.04

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

Related notices

  • USN-1735-1: openjdk-7-jre, openjdk-6, openjdk-7-jre-zero, icedtea-6-jre-jamvm, openjdk-6-jre-headless, openjdk-6-jre-zero, openjdk-7-jre-lib, openjdk-7, openjdk-6-jre-lib, icedtea-7-jre-cacao, icedtea-6-jre-cacao, openjdk-6-jre, icedtea-7-jre-jamvm, openjdk-7-jre-headless
  • USN-1732-3: openssl, libssl1.0.0