Your submission was sent successfully! Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

USN-1732-1: OpenSSL vulnerabilities

21 February 2013

Several security issues were fixed in OpenSSL.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

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)

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

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