Ubuntu 1139-1: Bind vulnerabilities

    Date30 May 2011
    CategoryUbuntu
    38
    Posted ByLinuxSecurity Advisories
    An attacker could send crafted input to Bind and cause it to crash.
    ==========================================================================
    Ubuntu Security Notice USN-1139-1
    May 30, 2011
    
    bind9 vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 11.04
    - Ubuntu 10.10
    - Ubuntu 10.04 LTS
    - Ubuntu 8.04 LTS
    
    Summary:
    
    An attacker could send crafted input to Bind and cause it to crash.
    
    Software Description:
    - bind9: Internet Domain Name Server
    
    Details:
    
    It was discovered that Bind incorrectly handled certain bad signatures if
    multiple trust anchors existed for a single zone. A remote attacker could
    use this flaw to cause Bind to stop responding, resulting in a denial of
    service. This issue only affected Ubuntu 8.04 LTS and 10.04 LTS.
    (CVE-2010-3762)
    
    Frank Kloeker and Michael Sinatra discovered that Bind incorrectly handled
    certain very large RRSIG RRsets included in negative responses. A remote
    attacker could use this flaw to cause Bind to stop responding, resulting in
    a denial of service. (CVE-2011-1910)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 11.04:
      libdns69                        1:9.7.3.dfsg-1ubuntu2.1
    
    Ubuntu 10.10:
      libdns66                        1:9.7.1.dfsg.P2-2ubuntu0.3
    
    Ubuntu 10.04 LTS:
      libdns64                        1:9.7.0.dfsg.P1-1ubuntu0.2
    
    Ubuntu 8.04 LTS:
      libdns36                        1:9.4.2.dfsg.P2-2ubuntu0.7
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      CVE-2010-3762, CVE-2011-1910
    
    Package Information:
      https://launchpad.net/ubuntu/+source/bind9/1:9.7.3.dfsg-1ubuntu2.1
      https://launchpad.net/ubuntu/+source/bind9/1:9.7.1.dfsg.P2-2ubuntu0.3
      https://launchpad.net/ubuntu/+source/bind9/1:9.7.0.dfsg.P1-1ubuntu0.2
      https://launchpad.net/ubuntu/+source/bind9/1:9.4.2.dfsg.P2-2ubuntu0.7
    
    
    
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