1. Ubuntu Security Notices
  2. USN-1732-1

USN-1732-1: OpenSSL vulnerabilities

Publication date

21 February 2013

Overview

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)

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

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
8.04 hardy libssl0.9.8 –  0.9.8g-4ubuntu3.20
12.10 quantal libssl1.0.0 –  1.0.1c-3ubuntu2.1
12.04 precise libssl1.0.0 –  1.0.1-4ubuntu5.6
11.10 oneiric libssl1.0.0 –  1.0.0e-2ubuntu4.7
10.04 lucid libssl0.9.8 –  0.9.8k-7ubuntu8.14

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References

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