Ubuntu 1232-2: X.Org X server regression

    Date19 Oct 2011
    CategoryUbuntu
    42
    Posted ByLinuxSecurity Advisories
    USN-1232-1 caused a regression with GLX support.
    ==========================================================================
    Ubuntu Security Notice USN-1232-2
    October 19, 2011
    
    xorg-server regression
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 10.04 LTS
    
    Summary:
    
    USN-1232-1 caused a regression with GLX support.
    
    Software Description:
    - xorg-server: X.Org X server
    
    Details:
    
    USN-1232-1 fixed vulnerabilities in the X.Org X server. A regression was
    found on Ubuntu 10.04 LTS that affected GLX support.
    
    This update temporarily disables the fix for CVE-2010-4818 that introduced
    the regression.
    
    We apologize for the inconvenience.
    
    Original advisory details:
    
     It was discovered that the X server incorrectly handled certain malformed
     input. An authorized attacker could exploit this to cause the X server to
     crash, leading to a denial or service, or possibly execute arbitrary code
     with root privileges. This issue only affected Ubuntu 10.04 LTS and 10.10.
     (CVE-2010-4818)
     
     It was discovered that the X server incorrectly handled certain malformed
     input. An authorized attacker could exploit this to cause the X server to
     crash, leading to a denial or service, or possibly read arbitrary data from
     the X server process. This issue only affected Ubuntu 10.04 LTS.
     (CVE-2010-4819)
     
     Vladz discovered that the X server incorrectly handled lock files. A local
     attacker could use this flaw to determine if a file existed or not.
     (CVE-2011-4028)
     
     Vladz discovered that the X server incorrectly handled setting lock file
     permissions. A local attacker could use this flaw to gain read permissions
     on arbitrary files and view sensitive information. (CVE-2011-4029)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 10.04 LTS:
      xserver-xorg-core               2:1.7.6-2ubuntu7.9
    
    After a standard system update you need to restart your session to make
    all the necessary changes.
    
    References:
      http://www.ubuntu.com/usn/usn-1232-2
      http://www.ubuntu.com/usn/usn-1232-1
      https://launchpad.net/bugs/877905
    
    Package Information:
      https://launchpad.net/ubuntu/+source/xorg-server/2:1.7.6-2ubuntu7.9
    
    
    
    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":"39","type":"x","order":"1","pct":50,"resources":[]},{"id":"88","title":"Should be more technical","votes":"11","type":"x","order":"2","pct":14.1,"resources":[]},{"id":"89","title":"Should include more HOWTOs","votes":"28","type":"x","order":"3","pct":35.9,"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.