Ubuntu 2639-1: OpenSSL vulnerabilities

    Date 11 Jun 2015
    86
    Posted By LinuxSecurity Advisories
    Several security issues were fixed in OpenSSL.
    ==========================================================================
    Ubuntu Security Notice USN-2639-1
    June 11, 2015
    
    openssl vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 15.04
    - Ubuntu 14.10
    - Ubuntu 14.04 LTS
    - Ubuntu 12.04 LTS
    
    Summary:
    
    Several security issues were fixed in OpenSSL.
    
    Software Description:
    - openssl: Secure Socket Layer (SSL) cryptographic library and tools
    
    Details:
    
    Praveen Kariyanahalli, Ivan Fratric and Felix Groebert discovered that
    OpenSSL incorrectly handled memory when buffering DTLS data. A remote
    attacker could use this issue to cause OpenSSL to crash, resulting in a
    denial of service, or possibly execute arbitrary code. (CVE-2014-8176)
    
    Joseph Barr-Pixton discovered that OpenSSL incorrectly handled malformed
    ECParameters structures. A remote attacker could use this issue to cause
    OpenSSL to hang, resulting in a denial of service. (CVE-2015-1788)
    
    Robert Swiecki and Hanno Böck discovered that OpenSSL incorrectly handled
    certain ASN1_TIME strings. A remote attacker could use this issue to cause
    OpenSSL to crash, resulting in a denial of service. (CVE-2015-1789)
    
    Michal Zalewski discovered that OpenSSL incorrectly handled missing content
    when parsing ASN.1-encoded PKCS#7 blobs. A remote attacker could use this
    issue to cause OpenSSL to crash, resulting in a denial of service.
    (CVE-2015-1790)
    
    Emilia Käsper discovered that OpenSSL incorrectly handled NewSessionTicket
    when being used by a multi-threaded client. A remote attacker could use
    this issue to cause OpenSSL to crash, resulting in a denial of service.
    (CVE-2015-1791)
    
    Johannes Bauer discovered that OpenSSL incorrectly handled verifying
    signedData messages using the CMS code. A remote attacker could use this
    issue to cause OpenSSL to hang, resulting in a denial of service.
    (CVE-2015-1792)
    
    As a security improvement, this update also modifies OpenSSL behaviour to
    reject DH key sizes below 768 bits, preventing a possible downgrade
    attack.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 15.04:
      libssl1.0.0                     1.0.1f-1ubuntu11.4
    
    Ubuntu 14.10:
      libssl1.0.0                     1.0.1f-1ubuntu9.8
    
    Ubuntu 14.04 LTS:
      libssl1.0.0                     1.0.1f-1ubuntu2.15
    
    Ubuntu 12.04 LTS:
      libssl1.0.0                     1.0.1-4ubuntu5.31
    
    After a standard system update you need to reboot your computer to make
    all the necessary changes.
    
    References:
      https://www.ubuntu.com/usn/usn-2639-1
      CVE-2014-8176, CVE-2015-1788, CVE-2015-1789, CVE-2015-1790,
      CVE-2015-1791, CVE-2015-1792
    
    Package Information:
      https://launchpad.net/ubuntu/+source/openssl/1.0.1f-1ubuntu11.4
      https://launchpad.net/ubuntu/+source/openssl/1.0.1f-1ubuntu9.8
      https://launchpad.net/ubuntu/+source/openssl/1.0.1f-1ubuntu2.15
      https://launchpad.net/ubuntu/+source/openssl/1.0.1-4ubuntu5.31
    
    
    

    LinuxSecurity Poll

    If you are using full-disk encryption: are you concerned about the resulting performance hit?

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    /main-polls/34-if-you-are-using-full-disk-encryption-are-you-concerned-about-the-resulting-performance-hit?task=poll.vote&format=json
    34
    radio
    [{"id":"120","title":"Yes","votes":"14","type":"x","order":"1","pct":58.33,"resources":[]},{"id":"121","title":"No ","votes":"10","type":"x","order":"2","pct":41.67,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350
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