Ubuntu 2639-1: OpenSSL vulnerabilities

    Date11 Jun 2015
    CategoryUbuntu
    49
    Posted ByLinuxSecurity 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:
      http://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
    
    
    
    You are not authorised to post comments.

    Comments powered by CComment

    LinuxSecurity Poll

    What do you think of the articles on LinuxSecurity?

    No answer selected. Please try again.
    Please select either existing option or enter your own, however not both.
    Please select minimum 0 answer(s) and maximum 3 answer(s).
    /main-polls/24-what-do-you-think-of-the-quality-of-the-articles-on-linuxsecurity?task=poll.vote&format=json
    24
    radio
    [{"id":"87","title":"Excellent, don't change a thing!","votes":"64","type":"x","order":"1","pct":57.14,"resources":[]},{"id":"88","title":"Should be more technical","votes":"15","type":"x","order":"2","pct":13.39,"resources":[]},{"id":"89","title":"Should include more HOWTOs","votes":"33","type":"x","order":"3","pct":29.46,"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
    bottom200

    We use cookies to provide and improve our services. By using our site, you consent to our Cookie Policy.