BIND vulnerable to an assertion failure when querying for SIG records

Overview

A vulnerability in the BIND name server could allow a remote attacker to cause a denial of service against an affected system.

Description

The Berkeley Internet Name Domain (BIND) is a popular Domain Name System (DNS) implementation from Internet Systems Consortium (ISC). A flaw exists in the way that some versions of BIND handle DNS Security Extensions (DNSSEC) signed Resource Record Sets (RRsets).

The specific impact of this vulnerability is slightly different depending on the type of DNS server involved. For recursive servers, queries for SIG records will trigger an assertion failure if more than one SIG(covered) RRset is returned. For authoritative servers, if a name server is serving a RFC 2535 DNSSEC zone and is queried for the SIG records where there are multiple SIG(covered) RRsets (e.g., a zone apex) then the name server daemon will trigger an assertion failure when it tries to construct the response.

This vulnerability affects BIND 9.3.x versions 9.3.0, 9.3.1, 9.3.2, 9.3.3b, and 9.3.3rc1, and BIND 9.4.x versions 9.4.0a1, 9.4.0a2, 9.4.0a3, 9.4.0a4, 9.4.0a5, 9.4.0a6, and 9.4.0b1.

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Impact

A remote attacker may be able to cause the name server daemon to crash, thereby causing a denial of service for DNS operations.

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Solution

Apply a patch from the vendor

Patches have been released in response to this issue. Please see the Systems Affected section of this document.

Upgrade

Users who compile their own versions of BIND from the original ISC source code are encouraged to upgrade to BIND 9.3.2-P1. Patches for this issue are also included in BIND versions 9.3.3rc2 and 9.4.0b2. Patched versions of the software are available from the BIND download page.

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Restrict Access

Administrators, particularly those who are unable to apply a patch, can limit exposure to this vulnerability by restricting sources that can ask for recursion.

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Vendor Information

915404

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Debian GNU/Linux __ Affected

Notified: August 23, 2006 Updated: September 11, 2006

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The Debian Security Team has published Debian Security Advisory DSA-1172 in response to this issue. Users are encouraged to review this advisory and apply the patches it refers to.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23915404 Feedback>).

F5 Networks, Inc. __ Affected

Notified: August 23, 2006 Updated: September 07, 2006

Status

Affected

Vendor Statement

F5 was provided with advance notice of this advisory, and has prepared patches for all affected actively-supported versions of BIG-IP and Enterprise Manager. These patches will be released immediately upon final verification of test results.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

FreeBSD, Inc. __ Affected

Notified: August 23, 2006 Updated: September 07, 2006

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The FreeBSD development team has published FreeBSD Security Advisory FreeBSD-SA-06:20.bind in response to this issue. Users are encouraged to review this advisory and apply the patches it refers to.

The bind9 FreeBSD port was also updated on 2006-09-06 to include patches for this issue. Users who obtain BIND from the FreeBSD ports collection are encourage to upgrade to this version (or later) of the port.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23915404 Feedback>).

Gentoo Linux __ Affected

Notified: August 23, 2006 Updated: October 02, 2006

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Gentoo has published Gentoo Linux Security Advisory GLSA 200609-11 in response to this issue. Users are encouraged to review this advisory and apply the patches it refers to.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23915404 Feedback>).

Internet Software Consortium __ Affected

Notified: August 18, 2006 Updated: September 06, 2006

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The Internet Software Consortium has published an alert on its BIND Vulnerabilities page (see CVE-2006-4095). Users who compile BIND from the original ISC source code distribution are encouraged to upgrade to BIND version 9.4.0b2, 9.3.3rc2, 9.3.2-P1, 9.2.7rc1, or 9.2.6-P1 (or later) as appropriate.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23915404 Feedback>).

Mandriva, Inc. __ Affected

Notified: August 23, 2006 Updated: September 11, 2006

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Mandriva has published Mandriva Advisory MDKSA-2006:163 in response to this issue. Users are encouraged to review this advisory and apply the patches it refers to.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23915404 Feedback>).

NetBSD __ Affected

Notified: August 23, 2006 Updated: October 02, 2006

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

NetBSD has published NetBSD Security Advisory 2006-022 in response to this issue. Users are encouraged to review this advisory and apply the patches it refers to.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23915404 Feedback>).

OpenBSD __ Affected

Notified: August 23, 2006 Updated: September 07, 2006

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Patches for this issue were committed to the HEAD, OPENBSD_3_8, and OPENBSD_3_9 branches of OpenBSD CVS repository on 2006-09-05. Users of OpenBSD-current and OpenBSD-stable can obtain these patches via the usual mechanisms for CVS access.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23915404 Feedback>).

OpenPKG __ Affected

Updated: September 07, 2006

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The OpenPKG security team has published OpenPKG Security Advisory OpenPKG-SA-2006.019 in response to this issue. Users are encouraged to review this advisory and apply the patches it refers to.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23915404 Feedback>).

Openwall GNU/*/Linux __ Affected

Notified: August 23, 2006 Updated: September 11, 2006

Status

Affected

Vendor Statement

We have fixed these issues by updating to BIND 9.3.2-P1 (with our usual modifications) in Owl-current as of 2006/09/06 and Owl 2.0-stable as of 2006/09/09.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Slackware Linux Inc. __ Affected

Notified: August 23, 2006 Updated: October 02, 2006

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Slackware has published Slackware Security Advisory SSA:2006-257-01 in response to this issue. Users are encouraged to review this advisory and apply the patches it refers to.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23915404 Feedback>).

Trustix Secure Linux __ Affected

Notified: August 23, 2006 Updated: October 02, 2006

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Trustix has published Trustix Secure Linux Security Advisory #2006-0051 in response to this issue. Users are encouraged to review this advisory and apply the patches it refers to.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23915404 Feedback>).

Ubuntu __ Affected

Notified: August 23, 2006 Updated: September 07, 2006

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

The Ubuntu development team has published Ubuntu Security Notice USN-343-1 in response to this issue. Users are encouraged to review this notice and apply the patches it refers to.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23915404 Feedback>).

rPath __ Affected

Updated: September 25, 2006

Status

Affected

Vendor Statement

`rPath Security Advisory: 2006-0166-1
Published: 2006-09-08
Products: rPath Linux 1
Rating: Major
Exposure Level Classification:
Remote Deterministic Denial of Service
Updated Versions:
bind=/conary.rpath.com@rpl:devel//1/9.3.2_P1-0.1-1
bind-utils=/conary.rpath.com@rpl:devel//1/9.3.2_P1-0.1-1

References:
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4095&gt;
<http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4096&gt;
<https://issues.rpath.com/browse/RPL-626&gt;

Description:
Previous versions of the bind package are vulnerable to
to multiple remote denial of service attacks.`

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Hitachi __ Not Affected

Notified: August 23, 2006 Updated: September 05, 2006

Status

Not Affected

Vendor Statement

HI-UX/WE2 is NOT vulnerable to this issue.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Infoblox __ Not Affected

Notified: August 23, 2006 Updated: September 07, 2006

Status

Not Affected

Vendor Statement

Infoblox does not believe Infoblox NIOS software is vulnerable to this issue.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Juniper Networks, Inc. __ Not Affected

Notified: August 23, 2006 Updated: September 05, 2006

Status

Not Affected

Vendor Statement

Juniper Networks products are not susceptible to this vulnerability

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Sun Microsystems, Inc. __ Not Affected

Notified: August 23, 2006 Updated: September 14, 2006

Status

Not Affected

Vendor Statement

Sun does not ship a version of BIND which is impacted by CERT VU#697164 or VU#915404 in any of the currently supported releases of Solaris: Solaris 8, 9, and 10.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Apple Computer, Inc. Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

BlueCat Networks, Inc. Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Check Point Software Technologies Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Conectiva Inc. Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Cray Inc. Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

EMC, Inc. (formerly Data General Corporation) Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Engarde Secure Linux Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Fedora Project Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Fujitsu Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

GNU glibc Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Gnu ADNS Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Hewlett-Packard Company Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

IBM Corporation Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

IBM Corporation (zseries) Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

IBM eServer Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Immunix Communications, Inc. Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Ingrian Networks, Inc. Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Lucent Technologies Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Men & Mice Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Metasolv Software, Inc. Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Microsoft Corporation Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

MontaVista Software, Inc. Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

NEC Corporation Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Nokia Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Nortel Networks, Inc. Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Novell, Inc. Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

QNX, Software Systems, Inc. Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Red Hat, Inc. Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

SUSE Linux Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Shadowsupport Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Silicon Graphics, Inc. Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Sony Corporation Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

The SCO Group Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Turbolinux Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Unisys Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Wind River Systems, Inc. Unknown

Notified: August 23, 2006 Updated: August 23, 2006

Status

Unknown

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

View all 54 vendors __View less vendors __

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://www.niscc.gov.uk/niscc/docs/re-20060905-00590.pdf?lang=en&gt;
• <http://jvn.jp/cert/JVNVU%23915404/index.html&gt;
• <http://secunia.com/advisories/21752/&gt;
• <http://secunia.com/advisories/21816/&gt;

Acknowledgements

Thanks to Joao Damas of the Internet Software Consortium for reporting this vulnerability.

This document was written by Chad R Dougherty.

Other Information

CVE IDs:	CVE-2006-4095
Severity Metric:	7.83 Date Public: