CVE-2010-3611: DHCP: Server Crash with Empty Link-Address Field

If the server receives a DHCPv6 packet containing one or more Relay-Forward messages, and none of them supply an address in the Relay-Forward link-address field, then the server will crash. This can be used as a single packet crash attack vector.

CVE: CVE-2010-3611

Posting date: 02 Nov 2010

Program Impacted: ISC DHCP

Versions affected: 4.0 through 4.2

Severity: High

Exploitable: Remotely

Description:

If the server receives a DHCPv6 packet containing one or more Relay-Forward messages, and none of them supply an address in the Relay-Forward link-address field, then the server will crash. This can be used as a single packet crash attack vector.

Impact and Risk Assessment:

This can be used as a single packet crash attack vector if the  server was explicitly configured to serve DHCPv6.

CVSS Score:   4.2

(for more on CVSS scores and to calculate your environment's specific risk, please visit: CVSS Calculator)

Workarounds:

None.

Active exploits:

None known at this time.

Solution:

Upgrade DHCP to 4.0.2, 4.1.2, or 4.2.0-P1.

Acknowledgements: John Gibbins, for finding issue and testing patch.

Document Revision History:

Removed broken link to kb.cert.org

Added acknowledgment to John Gibbins

Changed date to Nov 2nd

Related Documents:

If you'd like more information on our Forum or product support please visit www.isc.org/support.

Do you still have questions?   Questions regarding this advisory should go to security-officer@isc.org

Note: ISC patches only currently supported versions. When possible we indicate EOL versions affected.

ISC Security Vulnerability Disclosure Policy:   Details of our current security advisory policy and practice can be found here: https://www.isc.org/security-vulnerability-disclosure-policy

This Knowledge Base article https://kb.isc.org/article/AA-00965 is the complete and official security advisory document.

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