Ubuntu 1190-1: DHCP vulnerabilities

    Date15 Aug 2011
    CategoryUbuntu
    43
    Posted ByLinuxSecurity Advisories
    An attacker could send crafted input to DHCP and cause it to crash.
    ==========================================================================
    Ubuntu Security Notice USN-1190-1
    August 15, 2011
    
    dhcp3, isc-dhcp 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 DHCP and cause it to crash.
    
    Software Description:
    - isc-dhcp: DHCP server and client
    - dhcp3: DHCP server and client
    
    Details:
    
    David Zych discovered that DHCP incorrectly handled certain malformed
    packets. A remote attacker could use this issue to cause DHCP to crash,
    resulting in a denial of service.
    
    Update instructions:
    
    The problem can be corrected by updating your system to the following
    package versions:
    
    Ubuntu 11.04:
      isc-dhcp-server                 4.1.1-P1-15ubuntu9.1
    
    Ubuntu 10.10:
      dhcp3-server                    3.1.3-2ubuntu6.3
    
    Ubuntu 10.04 LTS:
      dhcp3-server                    3.1.3-2ubuntu3.3
    
    Ubuntu 8.04 LTS:
      dhcp3-server                    3.0.6.dfsg-1ubuntu9.3
    
    In general, a standard system update will make all the necessary changes.
    
    References:
      http://www.ubuntu.com/usn/usn-1190-1
      CVE-2011-2748, CVE-2011-2749
    
    Package Information:
      https://launchpad.net/ubuntu/+source/isc-dhcp/4.1.1-P1-15ubuntu9.1
      https://launchpad.net/ubuntu/+source/dhcp3/3.1.3-2ubuntu6.3
      https://launchpad.net/ubuntu/+source/dhcp3/3.1.3-2ubuntu3.3
      https://launchpad.net/ubuntu/+source/dhcp3/3.0.6.dfsg-1ubuntu9.3
    
    
    
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