Bug 708301 (CVE-2011-1910)

Summary:	CVE-2011-1910 bind: Large RRSIG RRsets and Negative Caching can crash named
Product:	[Other] Security Response	Reporter:	Mark J. Cox <mjc>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	aca21, atkac, dwalsh, qe-baseos-daemons, usman.mughall, vdanen
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
URL:	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2011-1910
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2011-06-28 09:58:28 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	708308, 708309, 708322, 708323, 833875
Bug Blocks:

Description Mark J. Cox 2011-05-27 08:08:03 UTC

Common Vulnerabilities and Exposures assigned an identifier CVE-2011-1910 to the following vulnerability:

A BIND 9 DNS server set up to be a caching resolver is vulnerable to a user querying a domain with very large resource record sets (RRSets) when trying to negatively cache a response. This can cause the BIND 9 DNS server (named process) to crash. 

http://www.isc.org/software/bind/advisories/cve-2011-1910

Comment 1 Mark J. Cox 2011-05-27 08:08:44 UTC

*** Bug 708296 has been marked as a duplicate of this bug. ***

Comment 4 Mark J. Cox 2011-05-27 09:58:55 UTC

Statement:

This issue did not affect bind packages shipped with Red Hat Enterprise Linux 4 and 5. It affected bind97 packages shipped with Red Hat Enterprise Linux 5 and bind packages shipped with Red Hat Enterprise Linux 6.

Comment 5 errata-xmlrpc 2011-05-31 14:53:01 UTC

This issue has been addressed in following products:

  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 6

Via RHSA-2011:0845 https://rhn.redhat.com/errata/RHSA-2011-0845.html

Comment 6 Usman Ahmad 2011-06-03 06:52:51 UTC

How can i verify that my current BIND version (9.4.3-P3) is affected by the bug reported in CVE-2011-1910. ?? 

Please guide

Comment 7 Vincent Danen 2011-06-14 19:18:05 UTC

You will need to look at the upstream advisory to find that information out.  We do not ship BIND 9.4.3 in any products, so we have not done any investigation as to whether or not it is vulnerable (it does look like some versions of 9.4 may be vulnerable, judging from the upstream advisory page).

Comment 8 Usman Ahmad 2011-06-28 09:32:08 UTC

Is there any command or stress tool by which i can check that my DNS service is vulnerable or not?

Comment 9 Adam Tkac 2011-06-28 09:54:56 UTC

(In reply to comment #8)
> Is there any command or stress tool by which i can check that my DNS service is
> vulnerable or not?

There is no tool for such checks. However I checked 9.4.3-P3 source and this version is NOT vulnerable.