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Category:   Application (Generic)  >   BIND Vendors:   ISC (Internet Software Consortium)
(FreeBSD Issues Fix) ISC BIND Packet Processing Flaw Lets Remote Users Deny Service
SecurityTracker Alert ID:  1026107
SecurityTracker URL:
CVE Reference:   CVE-2011-2464   (Links to External Site)
Date:  Sep 28 2011
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 9.6.3, 9.6-ESV-R4, 9.6-ESV-R4-P1, 9.6-ESV-R5b1 9.7.0, 9.7.0-P1, 9.7.0-P2, 9.7.1, 9.7.1-P1, 9.7.1-P2, 9.7.2, 9.7.2-P1, 9.7.2-P2, 9.7.2-P3, 9.7.3, 9.7.3-P1, 9.7.3-P2, 9.7.4b1 9.8.0, 9.8.0-P1, 9.8.0-P2, 9.8.0-P3, 9.8.1b1
Description:   A vulnerability was reported in ISC BIND. A remote user can cause denial of service conditions.

A remote user can send a specially crafted packet to cause the target 'named' service to exit. Recursive and authoritative servers are affected.

Impact:   A remote user can cause the target DNS service to exit.
Solution:   FreeBSD has issued a fix.

The FreeBSD advisory is available at:

Vendor URL: (Links to External Site)
Cause:   State error
Underlying OS:  UNIX (FreeBSD)
Underlying OS Comments:  8.2

Message History:   This archive entry is a follow-up to the message listed below.
Jul 5 2011 ISC BIND Packet Processing Flaw Lets Remote Users Deny Service

 Source Message Contents

Subject:  FreeBSD Security Advisory FreeBSD-SA-11:03.bind

Hash: SHA1

FreeBSD-SA-11:03.bind                                       Security Advisory
                                                          The FreeBSD Project

Topic:    	Remote packet Denial of Service against named(8) servers

Category:       contrib
Module:         bind
Announced:      2011-09-28
Credits:        Roy Arends
Affects:        8.2-STABLE after 2011-05-28 and prior to the correction date
Corrected:      2011-07-06 00:50:54 UTC (RELENG_8, 8.2-STABLE)
CVE Name:       CVE-2011-2464

Note: This advisory concerns a vulnerability which existed only in
the FreeBSD 8-STABLE branch and was fixed over two months prior to the
date of this advisory.

For general information regarding FreeBSD Security Advisories,
including descriptions of the fields above, security branches, and the
following sections, please visit <URL:>.

I.   Background

BIND 9 is an implementation of the Domain Name System (DNS) protocols.
The named(8) daemon is an Internet Domain Name Server.

II.  Problem Description

A logic error in the BIND code causes the BIND daemon to accept bogus
data, which could cause the daemon to crash.

III. Impact

An attacker able to send traffic to the BIND daemon can cause it to
crash, resulting in a denial of service.

IV.  Workaround

No workaround is available, but systems not running the BIND name server
are not affected.

V.   Solution

Upgrade your vulnerable system to 8-STABLE dated after the correction

VI.  Correction details

The following list contains the revision numbers of each file that was
corrected in FreeBSD.


Branch                                                           Revision
- -------------------------------------------------------------------------
- -------------------------------------------------------------------------


- -------------------------------------------------------------------------
stable/8/                                                         r223815
- -------------------------------------------------------------------------

VII. References

The latest revision of this advisory is available at
Version: GnuPG v2.0.18 (FreeBSD)

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