Vulnerability Note VU#542123

Overview

ISC BIND 9 resolver contains a vulnerability that could allow a attacker to keep a domain name in the cache even after it has been deleted from registration.

Description

According to ISC: ISC has been notified by Haixin Duan (a professor at Tsinghua University in Beijing China, who is currently visiting the International Computer Science Institute (ICSI) at the University of California, Berkeley) about a DNS resolver vulnerability. This vulnerability allows a miscreant to keep a domain name in the cache even after it has been deleted from registration. ISC is evaluating the risk of this vulnerability, but the published paper shows how this was done live across the Internet. It lists several DNS implementations and open resolver deployments as vulnerable. The exploit was presented at the NDSS conference: "Ghost Domain Names: Revoked Yet Still Resolvable."

Impact

A remote, unauthenticated attacker can cause the BIND 9 resolver to keep a domain name in the cache even after it has been deleted from registration.

Solution

We are currently unaware of a practical solution to this problem.

Vendor Information (Learn More)

Vendor	Status	Date Notified	Date Updated
Internet Systems Consortium	Affected	-	08 Feb 2012

If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group	Score	Vector
Base	5.0	AV:N/AC:L/Au:N/C:N/I:P/A:N
Temporal	3.9	E:POC/RL:OF/RC:C
Environmental	3.9	CDP:ND/TD:H/CR:ND/IR:ND/AR:ND

References

• https://www.isc.org/software/bind/advisories/cve-2012-1033
• http://www.internetsociety.org/events/ndss-symposium-2012/symposium-program/feb08

Credit

The Internet Systems Consortium thanks the following people for reporting this vulnerability:

Jian Jiang, Network Research Center, Tsinghua University
Haixin Duan, Network Research Center, Tsinghua University
Jianping Wu, Network Research Center, Tsinghua University
Kang Li, Department of Computer Science, University of Georgia
Jun Li, University of Oregon Carlos III University of Madrid, Institute IMDEA Networks
Jinjin Liang, Network Research Center Tsinghua University
Nicholas Weaver, International Computer Science Institute (ICSI)

This document was written by Michael Orlando.

Other Information

• CVE IDs: CVE-2012-1033
• Date Public: 07 Feb 2012
• Date First Published: 08 Feb 2012
• Date Last Updated: 23 Jul 2012
• Severity Metric: 19.89
• Document Revision: 71