Ubuntu 1732-1: OpenSSL vulnerabilities

    Date21 Feb 2013
    CategoryUbuntu
    31
    Posted ByLinuxSecurity Advisories
    Several security issues were fixed in OpenSSL.
    ==========================================================================
    Ubuntu Security Notice USN-1732-1
    February 21, 2013
    
    openssl vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 12.10
    - Ubuntu 12.04 LTS
    - Ubuntu 11.10
    - Ubuntu 10.04 LTS
    - Ubuntu 8.04 LTS
    
    Summary:
    
    Several security issues were fixed in OpenSSL.
    
    Software Description:
    - 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 12.10:
      libssl1.0.0                     1.0.1c-3ubuntu2.1
    
    Ubuntu 12.04 LTS:
      libssl1.0.0                     1.0.1-4ubuntu5.6
    
    Ubuntu 11.10:
      libssl1.0.0                     1.0.0e-2ubuntu4.7
    
    Ubuntu 10.04 LTS:
      libssl0.9.8                     0.9.8k-7ubuntu8.14
    
    Ubuntu 8.04 LTS:
      libssl0.9.8                     0.9.8g-4ubuntu3.20
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    References:
      http://www.ubuntu.com/usn/usn-1732-1
      CVE-2012-2686, CVE-2013-0166, CVE-2013-0169
    
    Package Information:
      https://launchpad.net/ubuntu/+source/openssl/1.0.1c-3ubuntu2.1
      https://launchpad.net/ubuntu/+source/openssl/1.0.1-4ubuntu5.6
      https://launchpad.net/ubuntu/+source/openssl/1.0.0e-2ubuntu4.7
      https://launchpad.net/ubuntu/+source/openssl/0.9.8k-7ubuntu8.14
      https://launchpad.net/ubuntu/+source/openssl/0.9.8g-4ubuntu3.20
    
    
    
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