Bug 1108544 (CVE-2014-3859)

Summary:	CVE-2014-3859 bind: assertion failure during EDNS option processing
Product:	[Other] Security Response	Reporter:	Murray McAllister <mmcallis>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	psimerda, thozza, vdanen, vonsch
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	bind 9.10.0-P2	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2014-06-12 08:35:11 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:

Description Murray McAllister 2014-06-12 08:27:25 UTC

A flaw in the EDNS option processing could cause named to crash with an assertion failure when processing specially-crafted queries.

This issue only affected BIND versions 9.10.0 and 9.10.0-P1. This version is not shipped in any Red Hat products or in Fedora.

External References:

https://kb.isc.org/article/AA-01166

Comment 2 Murray McAllister 2014-06-12 08:30:52 UTC

Statement:

Not vulnerable. This issue did not affect the versions of bind or bind97 as shipped with Red Hat Enterprise Linux 5, 6, and 7.

Comment 4 Murray McAllister 2014-06-12 08:34:45 UTC

This issue (or some of it) was fixed with the following:

lib/dns/message.c
@@ -3359,6 +3360,8 @@
 				 * version
 				 */
 				ADD_STRING(target, "(\"");
+				if (isc_buffer_availablelength(target) < optlen)
+					return (ISC_R_NOSPACE);
 				for (i = 0; i < optlen; i++) {
 					if (isprint(optdata[i]))
 						isc_buffer_putmem(target,