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CVE-2012-3570: An Error in the Handling of an Unexpected Client Identifiers can Cause Server Crash When Serving DHCPv6

  • Updated on 30 Jul 2012
  • 3 minutes to read
  • Contributors 

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

CVE: 

CVE-2012-3570

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/docs/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

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