(FreeBSD Issues Fix) ISC BIND Packet Processing Flaw Lets Remote Users Deny Service
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SecurityTracker Alert ID: 1026107 |
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SecurityTracker URL: http://securitytracker.com/id/1026107
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CVE Reference:
CVE-2011-2464
(Links to External Site)
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Date: Sep 28 2011
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Impact:
Denial of service via network
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Fix Available: Yes Vendor Confirmed: Yes
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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
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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.
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Impact:
A remote user can cause the target DNS service to exit.
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Solution:
FreeBSD has issued a fix.
The FreeBSD advisory is available at:
http://security.FreeBSD.org/advisories/FreeBSD-SA-11:03.bind.asc
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Vendor URL: www.isc.org/software/bind/advisories/cve-2011-2464 (Links to External Site)
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Cause:
State error
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Underlying OS: UNIX (FreeBSD)
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Underlying OS Comments: 8.2
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Message History:
This archive entry is a follow-up to the message listed below.
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Source Message Contents
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Subject: FreeBSD Security Advisory FreeBSD-SA-11:03.bind
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-----BEGIN PGP SIGNED MESSAGE-----
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:http://security.FreeBSD.org/>.
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
date.
VI. Correction details
The following list contains the revision numbers of each file that was
corrected in FreeBSD.
CVS:
Branch Revision
Path
- -------------------------------------------------------------------------
RELENG_8
src/contrib/bind9/lib/dns/message.c 1.3.2.3
- -------------------------------------------------------------------------
Subversion:
Branch/path
Revision
- -------------------------------------------------------------------------
stable/8/ r223815
- -------------------------------------------------------------------------
VII. References
http://www.isc.org/software/bind/advisories/cve-2011-2464
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2464
The latest revision of this advisory is available at
http://security.FreeBSD.org/advisories/FreeBSD-SA-11:03.bind.asc
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