Knowledge Base ISC Main Website Ask a Question/Contact ISC
CVE-2012-3570: An Error in the Handling of an Unexpected Client Identifiers can Cause Server Crash When Serving DHCPv6
Author: Michael McNally Reference Number: AA-00714 Views: 3861 Created: 2012-07-02 23:53 Last Updated: 2012-07-30 19:11 0 Rating/ Voters

Title:  An error in the handling of an unexpected client identifiers can cause a server crash when serving DHCPv6.

Document Version:          2.1
Posting date: 
24 Jul 2012
Program Impacted: 
DHCP
Versions affected: 
4.2.0 --> 4.2.4
Severity: 
High
Exploitable: 
From adjacent networks

Description: 

An unexpected client identifier parameter can cause the ISC DHCP daemon to segmentation fault when running in DHCPv6 mode, resulting in a denial of service to further client requests. 

In order to exploit this condition, an attacker must be able to send requests to the DHCP server.

Impact:

Causes the server process to crash when a buffer overflows, resulting in a denial of service.  NOTE: DHCP versions 4.0 -->4.1.x are NOT impacted.

CVSS Score: 6.1

CVSS Equation:  (AV:A/AC:L/Au:N/C:N/I:N/A:C)
For more information on the Common Vulnerability Scoring System and to obtain your specific environmental score please visit http://nvd.nist.gov/cvss.cfm?calculator&adv&version=2&vector=(AV:A/AC:L/Au:N/C:N/I:N/A:C)

Workarounds: 

None.

Active exploits: 

None known at this time.

Solution: 
Upgrade affected systems to DHCP 4.2.4-P1

DHCP 4.2.4-P1 is available from www.isc.org/downloads/all

Acknowledgment: 
Markus Hietava of Codenomicon CROSS project for finding the vulnerability, and CERT-FI for vulnerability coordination.

Document Revision History:

1.0 - 03 July 2012 - Phase I notified
1.1 - 13 July 2012 HOLD notice sent to Phase 1 regarding new CVE being added and new public release date
1.2 - 23 July 2012 Phase 2 & 3 notified
2.0 - 24 July 2012 Phase 4-Public release
2.1 - 30 July 2012 Added Chinese Translation

References:

This security advisory is also located in our KnowledgeBase: https://kb.isc.org/Article/AA-00714

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

If you'd like more information on our Forum or BIND/DHCP support please visit www.isc.org/software/guild or www.isc.org/support

© 2001-2014 Internet Systems Consortium

Feedback
  • Please help us to improve the content of our knowledge base by letting us know how we can improve this article or by submitting suggestions for other articles you'd like to see created. Information on how to obtain further help on our products or services can be found on our main website.' If you have a technical question or problem on which you'd like help, we recommend searching our community mailing list archives and/or posting your question there (you will need to register there first for your posts to be accepted). The bind-users and the dhcp-users lists particularly have a long-standing and active membership.
Info Submit Feedback on this Article
Nickname: Your Email: Subject: Comment:
Enter the code below:
Quick Jump Menu