Ubuntu 1519-1: DHCP vulnerabilities

    Date26 Jul 2012
    CategoryUbuntu
    54
    Posted ByLinuxSecurity Advisories
    DHCP could be made to crash if it received specially crafted network traffic.
    ==========================================================================
    Ubuntu Security Notice USN-1519-1
    July 26, 2012
    
    isc-dhcp vulnerabilities
    ==========================================================================
    
    A security issue affects these releases of Ubuntu and its derivatives:
    
    - Ubuntu 12.04 LTS
    - Ubuntu 11.10
    - Ubuntu 11.04
    
    Summary:
    
    DHCP could be made to crash if it received specially crafted network
    traffic.
    
    Software Description:
    - isc-dhcp: DHCP server and client
    
    Details:
    
    Markus Hietava discovered that the DHCP server incorrectly handled certain
    malformed client identifiers. A remote attacker could use this issue to
    cause DHCP to crash, resulting in a denial of service. (CVE-2012-3571)
    
    Glen Eustace discovered that the DHCP server incorrectly handled memory. A
    remote attacker could use this issue to cause DHCP to crash, resulting in a
    denial of service. (CVE-2012-3954)
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 12.04 LTS:
      isc-dhcp-server                 4.1.ESV-R4-0ubuntu5.2
    
    Ubuntu 11.10:
      isc-dhcp-server                 4.1.1-P1-17ubuntu10.3
    
    Ubuntu 11.04:
      isc-dhcp-server                 4.1.1-P1-15ubuntu9.4
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      http://www.ubuntu.com/usn/usn-1519-1
      CVE-2012-3571, CVE-2012-3954
    
    Package Information:
      https://launchpad.net/ubuntu/+source/isc-dhcp/4.1.ESV-R4-0ubuntu5.2
      https://launchpad.net/ubuntu/+source/isc-dhcp/4.1.1-P1-17ubuntu10.3
      https://launchpad.net/ubuntu/+source/isc-dhcp/4.1.1-P1-15ubuntu9.4
    
    
    
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