Ubuntu 1226-2: cifs-utils vulnerabilities

    Date04 Oct 2011
    CategoryUbuntu
    45
    Posted ByLinuxSecurity Advisories
    An attacker could trick cifs-utils into corrupting the system mtab file.
    ==========================================================================
    Ubuntu Security Notice USN-1226-2
    October 04, 2011
    
    cifs-utils vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 11.04
    - Ubuntu 10.10
    
    Summary:
    
    An attacker could trick cifs-utils into corrupting the system mtab file.
    
    Software Description:
    - cifs-utils: Common Internet File System utilities
    
    Details:
    
    Dan Rosenberg discovered that cifs-utils incorrectly handled changes to the
    mtab file. A local attacker could use this issue to corrupt the mtab file,
    possibly leading to a denial of service. (CVE-2011-1678)
    
    Jan Lieskovsky discovered that cifs-utils incorrectly filtered certain
    strings being added to the mtab file. A local attacker could use this issue
    to corrupt the mtab file, possibly leading to a denial of service.
    (CVE-2011-2724)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 11.04:
      smbfs                           2:4.5-2ubuntu0.11.04.1
    
    Ubuntu 10.10:
      smbfs                           2:4.5-2ubuntu0.10.10.1
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      http://www.ubuntu.com/usn/usn-1226-2
      http://www.ubuntu.com/usn/usn-1226-1
      CVE-2011-1678, CVE-2011-2724
    
    Package Information:
      https://launchpad.net/ubuntu/+source/cifs-utils/2:4.5-2ubuntu0.11.04.1
      https://launchpad.net/ubuntu/+source/cifs-utils/2:4.5-2ubuntu0.10.10.1
    
    
    
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