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ISC DHCP server vulnerability

Vulnerability Note VU#159528

Original Release Date: 2010-12-13 | Last Revised: 2010-12-13


The ISC DHCP server contains a vulnerability that could allow a remote attacker to cause a denial of service.


According to ISC:

If a TCP connection is established to the server on a port which has been configured for communication with a failover peer, this can cause it to become non-responsive to all normal DHCP protocol traffic. The server will progress to a communications-interrupted state - but in addition will also cease to provide DHCP services to clients. The server must be restarted to resume normal operation.
This can be used as an attack vector against servers that are configured for failover partnerships.


An unauthenticated remote attacker could cause the server to become unresponsive to all normal DHCP protocol traffic, thereby creating a denial of service.


Apply an update

Users who obtain ISC DHCP from a third-party vendor, such as their operating system vendor, should see the vendor information portion of this document for a partial list of affected vendors.

This vulnerability is addressed in ISC DHCP version 4.2.0-P2. Users of ISC DHCP from the original source distribution should upgrade to this version or later, as appropriate.

See also

Vendor Information


Internet Systems Consortium - DHCP Affected

Updated:  December 13, 2010



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Vendor References

CVSS Metrics

Group Score Vector



Thanks to Internet Systems Consortium for reporting this vulnerability.

This document was written by Michael Orlando.

Other Information

CVE IDs: CVE-2010-3616
Severity Metric: 11.81
Date Public: 2010-12-13
Date First Published: 2010-12-13
Date Last Updated: 2010-12-13 16:08 UTC
Document Revision: 9

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