ISC DHCP DHCPv6 denial of service

dhcp-dhcpv6-dos (64959) The risk level is classified as MediumMedium Risk

Description:

ISC DHCP is vulnerable to a denial of service, caused by an assertion error when processing DHCPv6 messages for a previously declined address. A remote attacker could exploit this vulnerability to cause the server to crash.

*CVSS:

Base Score: 5
  Access Vector: Network
  Access Complexity: Low
  Authentication: None
  Confidentiality Impact: None
  Integrity Impact: None
  Availability Impact: Partial
 
Temporal Score: 3.7
  Exploitability: Unproven
  Remediation Level: Official-Fix
  Report Confidence: Confirmed

Consequences:

Denial of Service

Remedy:

Upgrade to the latest version of ISC DHCP (4.1.2-P1, 4.1-ESV-R1, and 4.2.1b1 or later), available from the Internet Systems Consortium Web site. See References.

References:

  • Internet Systems Consortium Web site: DHCP May Crash After Processing a DHCPv6 Decline Message.
  • BID-46035: ISC DHCP Server DHCPv6 Decline Message Denial of Service Vulnerability
  • CVE-2011-0413: The DHCPv6 server in ISC DHCP 4.0.x and 4.1.x before 4.1.2-P1, 4.0-ESV and 4.1-ESV before 4.1-ESV-R1, and 4.2.x before 4.2.1b1 allows remote attackers to cause a denial of service (assertion failure and daemon crash) by sending a message over IPv6 for a declined and abandoned address.
  • DSA-2184: isc-dhcp -- denial of service
  • OSVDB ID: 70680: ISC DHCP DHCPv6 Message Declined Address Remote DoS
  • RHSA-2011-0256: Moderate: dhcp security update
  • SA43006: ISC DHCPv6 Message Processing Denial of Service Vulnerability
  • SA43104: ISC DHCPv6 Message Processing Denial of Service Vulnerability
  • SUSE-SR:2011:003: SUSE Security Summary Report
  • US-CERT VU#686084: ISC DHCP server DHCPv6 decline message processing vulnerability

Platforms Affected:

  • ISC DHCP 4.2
  • ISC DHCP 6
  • RedHat Enterprise Linux 6 Server
  • RedHat Enterprise Linux 6 Workstation
  • RedHat Enterprise Linux Desktop 6
  • RedHat Enterprise Linux HPC Node 6
  • RedHat Enterprise Linux Server EUS 6.0.z

Reported:

Jan 26, 2011

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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.

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