SuSE Information for VU#715973

ISC BIND 8.2.2-P6 vulnerable to DoS via compressed zone transfer, aka the "zxfr bug"

Status

Affected

Vendor Statement

SuSE Linux has published a Security Announcement (below) regarding this vulnerability. For the latest version of this advisory, please visit:



______________________________________________________________________________

                        SuSE Security Announcement

        Package:                bind8
       Announcement-ID:        SuSE-SA:2000:45
       Date:                   Thursday, November 16th, 2000 16:00 MEST
       Affected SuSE versions: 6.0, 6.1, 6.2, 6.3, 6.4
       Vulnerability Type:     remote denial of service
       Severity (1-10):        7
       SuSE default package:   no
       Other affected systems: all systems using bind, version 8.2.2 before
                               patchlevel 7


    Content of this advisory:
       1) security vulnerability resolved: bind8
          problem description, discussion, solution and upgrade information
       2) pending vulnerabilities, solutions, workarounds
       3) standard appendix (further information)


______________________________________________________________________________

1)  problem description, brief discussion, solution, upgrade information


    BIND, the Berkeley Internet Name Daemon, versions before 8.2.2p7, has
   been found vulnerable to two denial of service attacks: named may crash
   after a compressed zone transfer request (ZXFR) and if an SRV record
   (defined in RFC2782) is sent to the server. Administrators testing
   the ZXFR bug should be aware that it can take several seconds after
   the triggering the bug until the nameserver daemon crashes.
   SuSE versions 6.0 through 6.4 are affected by these two problems.
   The bind8 package in SuSE-7.0 is not affected because a different
   version of bind8 (8.2.3) was used in this distribution. By the release
   time of the SuSE-7.0 distribution our engineers have determined that
   the problems we had with stalling zone transfers under some obscure
   conditions were not present with the 8.2.3 release of the package.


    Administrators are strongly recommended to upgrade their bind8 package
   using the provided packages from the sources below. There is a
   temporary fix for the ZXFR problem (disable zone transfers) but none
   for the SRV record problem.
   For the latest information about security vulnerabilities in the bind
   name server consider the Internet Software Consortium bind security
   webpage at http://www.isc.org/products/BIND/bind-security.html .


    To check if your system has the vulnerable package installed, use the
   command `rpm -q <package name>´. If applicable, please choose the update
   package(s) for your distribution from the URLs listed below and download
   the necessary rpm files. Then, install the package using the command
   `rpm -Uhv file.rpm´. rpm packages have an internal md5 checksum that
   protects against file corruption. You can verify this checksum using
   the command (independently from the md5 signatures below)
       `rpm --checksig --nogpg file.rpm',
   The md5 sums under each package are to prove the package authenticity,
   independently from the md5 checksums in the rpm package format.


    i386 Intel Platform:

    SuSE-6.4
   ftp://ftp.suse.com/pub/suse/i386/update/6.4/n1/bind8-8.2.2-139.i386.rpm
     c6f2242efe722aaa4320010e00ddc080
   source rpm:
   ftp://ftp.suse.com/pub/suse/i386/update/6.4/zq1/bind8-8.2.2-139.src.rpm
     ecd26bdf60d7950585649bc638a1d812


    SuSE-6.3
   ftp://ftp.suse.com/pub/suse/i386/update/6.3/n1/bind8-8.2.2-139.i386.rpm
     d3f51528ad2120cd3dc6517c2bc26c0a
   source rpm:
   ftp://ftp.suse.com/pub/suse/i386/update/6.3/zq1/bind8-8.2.2-139.src.rpm
     6f1b8c1227d4876389a28d416a952713


    SuSE-6.2
   ftp://ftp.suse.com/pub/suse/i386/update/6.2/n1/bind8-8.2.2-139.i386.rpm
     4d8a9f4c6e041326929bbdae97c10105
   source rpm:
   ftp://ftp.suse.com/pub/suse/i386/update/6.2/zq1/bind8-8.2.2-139.src.rpm
     83807820676d98687797ffff6f5b425c


    SuSE-6.1
   ftp://ftp.suse.com/pub/suse/i386/update/6.1/n1/bind8-8.2.2-139.i386.rpm
     1694cf40b5fa41361749297c9cddbca4
   source rpm:
   ftp://ftp.suse.com/pub/suse/i386/update/6.1/zq1/bind8-8.2.2-139.src.rpm
     8c5f727554e12a5aedb96de3db663518


    SuSE-6.0
   Please use the package from the 6.1 distribution.


    AXP Alpha Platform:

    SuSE-6.4
   ftp://ftp.suse.com/pub/suse/axp/update/6.4/n1/bind8-8.2.2-139.alpha.rpm
     51f61faaad78160fb3dcc68a8588c209
   source rpm:
   ftp://ftp.suse.com/pub/suse/axp/update/6.4/zq1/bind8-8.2.2-139.src.rpm
     f42c51962852f8ff14e2d6423de62aec


    SuSE-6.3
   ftp://ftp.suse.com/pub/suse/axp/update/6.3/n1/bind8-8.2.2-139.alpha.rpm
     4d16cecb0da4f8ed6bff9c92655b9036
   source rpm:
   ftp://ftp.suse.com/pub/suse/axp/update/6.3/zq1/bind8-8.2.2-139.src.rpm
     d8c4d1d9f0a14249151aa9d9e25f1db8


    SuSE-6.1
   ftp://ftp.suse.com/pub/suse/axp/update/6.1/n1/bind8-8.2.2-139.alpha.rpm
     6a4f5b18072cca93f9064fdc802e50fb
   source rpm:
   ftp://ftp.suse.com/pub/suse/axp/update/6.1/zq1/bind8-8.2.2-139.src.rpm
     a3eec237cc642739b5b6c6eea6d197c0



    PPC Power PC Platform:

    SuSE-6.4
   ftp://ftp.suse.com/pub/suse/ppc/update/6.4/n1/bind8-8.2.2-139.ppc.rpm
     65e82b875e7f8ff7409062d502d56115
   source rpm:
   ftp://ftp.suse.com/pub/suse/ppc/update/6.4/zq1/bind8-8.2.2-139.src.rpm
     fd2a6e2a29a80b997758d4245913ff51




______________________________________________________________________________

2)  Pending vulnerabilities in SuSE Distributions and Workarounds:

    A new security announcement follows this advisory.
______________________________________________________________________________


3)  standard appendix:

    SuSE runs two security mailing lists to which any interested party may
   subscribe:


    suse-security@suse.com
       -   general/linux/SuSE security discussion.
           All SuSE security announcements are sent to this list.
           To subscribe, send an email to
               <suse-security-subscribe@suse.com>.


    suse-security-announce@suse.com
       -   SuSE's announce-only mailing list.
           Only SuSE's security annoucements are sent to this list.
           To subscribe, send an email to
               <suse-security-announce-subscribe@suse.com>.


    For general information or the frequently asked questions (faq)
   send mail to:
       <suse-security-info@suse.com> or
       <suse-security-faq@suse.com> respectively.


    ===============================================
   SuSE's security contact is <security@suse.com>.
   ===============================================


Regards,
Roman Drahtmüller.
- - --
-                                                                      -
| Roman Drahtmüller      <draht@suse.de> //          "Caution: Cape does |
 SuSE GmbH - Security           Phone: //       not enable user to fly."
| Nürnberg, Germany     +49-911-740530 // (Batman Costume warning label) |
-                                                                      -
______________________________________________________________________________


    The information in this advisory may be distributed or reproduced,
   provided that the advisory is not modified in any way.
   SuSE GmbH makes no warranties of any kind whatsoever with respect
   to the information contained in this security advisory.


Type Bits/KeyID    Date       User ID
pub  2048/3D25D3D9 1999/03/06 SuSE Security Team <security@suse.de>


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