SSRT2316 Security Vulnerability in DNS resolver libraries (rev.7)

SSRT2316 Security Vulnerability in DNS resolver libraries (rev.7)

Post by Security Ale » Wed, 16 Oct 2002 22:27:47

Hash: SHA1

 **REVISED 07**
 Originally issued: 12 Aug 2002
 Last revised: 15 Oct 2002
 SSRT2316 Security Vulnerability in DNS resolver libraries

NOTICE: There are no restrictions for distribution of this
Bulletin provided that it remains complete and intact.

The information in the following Security Bulletin should be
acted upon as soon as possible.  Hewlett-Packard Company will
not be liable for any consequences to any customer resulting
from customer's failure to fully implement instructions in this
Security Bulletin as soon as possible.


PROBLEM: Potential buffer overflows in DNS resolver libraries.

 **REVISED 07**
PLATFORM: HP9000 Series 700/800 running HP-UX releases 11.00 and
          11.11 (11i) with products using DNS resolver libraries,
          including, but not limited to, BINDv920.INETSVCS-BIND,
          Bind-8.1.2. and libnss_dns.
          HP9000 Series 700/800 running HP-UX release 10.20
- -->>      HP9000 Series 700/800 running HP-UX release 10.24
- -->>      or 11.04 (VVOS)

IMPACT: Potential unauthorized access, denial of service.

 **REVISED 07**
SOLUTION: Until a product upgrade is available, download and
- -->>      install appropriate preliminary updates and the
- -->>      appropriate preliminary or final patches.

 **REVISED 07**
                Install the applicable upgrades and patches:

                BIND920ver3.depot for 11.11
                PHNE_25140.depot s700_800 11.11 Bind-8.1.2 patch
                PHNE_27647.depot s700_800 11.11 libnss_dns

- -->>            PHNE_27880.depot s700_800 11.04 Bind 4.9.7
- -->>            PHNE_27881.depot s700_800 11.04 libnss_dns

                upgrade_bind812_v4.depot for 11.00.
                PHNE_27748.depot s700_800 11.00 Bind 4.9.7
                PHNE_27646.depot s700_800 11.00 libnss_dns

- -->>            PHNE_27879.depot s700_800 10.24 BIND 4.9.7
- -->>            PHCO_27882: s700_800 10.24 libc

                PHNE_27762.depot s700_800 10.20 Bind 4.9.7
                PHCO_26152.depot s700_800 10.20 libc

                Relink statically linked programs calling the
                DNS API on 10.20.

 **REVISED 07**
AVAILABILITY:  The depots are available now.
- -->>           PHCO_27882 for 10.24 (VVOS) is available
- -->>           now from the itrc.
               The preliminary patches (depot files) are
               available only from the ftp site (below) at
               this time.
               This bulletin will be will be updated when a
               product upgrade is available. This bulletin
               will also be updated when solutions for
               other vulnerable products are available.

CHANGE SUMMARY: Rev.01 -  Added Bind-8.1.2. and libnss_dns
                Rev.02 -  A patch was incorrectly listed,
                          PHNE_27647.depot is the correct number.
                          New version available, BIND920ver3.depot.
                Rev.03 -  Added Bind-4.9.7 information for 11.00.
                Rev.04 -  Added Bind-4.9.7 information for 10.20.
                Rev.05 -  Added libc information for 10.20.
                Rev.06 -  Corrected "strings" to "strings -a"
                Rev.07 -  Added 11.04 and 10.24 information.

 A. Background
    CERT advisory CA-2002-19 reports a buffer overflow
    vulnerability which may affect products on HP-UX release
    11.00 and release 11.11 (11i).  The vulnerable products
    include BINDv920.INETSVCS-BIND.  This bulletin will be
    updated when solutions for other vulnerable products are
    Bind-8.1.2 is vulnerable.
    The libnss_dns.1 library is vulnerable.
    Bind-4.9.7 is vulnerable.
    HP-UX 10.20 programs calling the DNS API are vulnerable.

 B. Recommended solution

     The following preliminary fixes are available:

      HP-UX 10.20

       PHNE_27762.depot s700_800 10.20 Bind 4.9.7 components
       PHCO_26152.depot s700_800 10.20 libc

 **REVISED 07**
- -->> HP-UX 10.24

- -->>   PHNE_27879.depot s700_800 10.24 (VVOS) BIND 4.9.7 components
- -->>   PHCO_27882: s700_800 10.24 (VVOS) libc

      HP-UX 11.00

       upgrade_bind812_v4.depot for 11.00
       PHNE_27748.depot s700_800 11.00 Bind 4.9.7 components
       PHNE_27646.depot s700_800 11.00 libnss_dns

- -->>  HP-UX 11.04

- -->>   PHNE_27880.depot s700_800 11.04 (VVOS) Bind 4.9.7 components
- -->>   PHNE_27881.depot s700_800 11.04 (VVOS) libnss_dns

      HP-UX 11.11

       BIND920ver3.depot for 11.11
       PHNE_25140.depot s700_800 11.11 Bind-8.1.2 patch
       PHNE_27647.depot s700_800 11.11 libnss_dns

     Note: BIND920ver3.depot also corrects potential problems
           reported in CERT advisory CA-2002-23.

    I. Until a product upgrade is available, download and install
       the BIND920ver3.depot.

      1. Download BIND920ver3.depot.gz from the ftp site.
         This file is temporary and will be deleted when a
         product upgrade is available from

        System:  (
        Login:     bind
        Password:  bind1

        FTP Access:
                or: ftp://bind:bi...@
        file: BIND920ver3.depot.gz

        Note: There is an ftp defect in IE5 that may result in
               a browser hang.  To work around this:
        - Select Tools -> Internet Options -> Advanced
        - Un-check the option: [ ] Enable folder view for FTP sites

      2. Copy the BIND920ver3.depot.gz file to a protected
         directory and unpack it.
         If you wish to verify the md5 sum please refer to:

               Patch sums and the MD5 program

          The md5 sum for BIND920ver3.depot is:

      MD5 (BIND920ver3.depot) = 0108336cd2d84adf71eafbbe8e133c36

          The cksum output is:

      251480612 20725760 BIND920ver3.depot

      3. Install BIND920ver3.depot using swinstall.

    II. Until a product upgrade is available, download and install
        the upgrade_bind812_v4.depot for 11.00.  The instructions
        for BIND920ver3.depot above apply.

            file: upgrade_bind812_v4.depot.gz

            MD5 (upgrade_bind812_v4.depot) =

            cksum upgrade_bind812_v4.depot
            330647597 1116160 upgrade_bind812_v4.depot

      III. Download and install the appropriate preliminary patch
           from the ftp site listed above:

 **REVISED 07**
      PHNE_27762.depot s700_800 10.20 Bind 4.9.7 components
      PHCO_26152.depot s700_800 10.20 libc patch
- -->>  PHNE_27879.depot s700_800 10.24 (VVOS) BIND 4.9.7 components
- -->>  PHCO_27882: s700_800 10.24 (VVOS) libc
      PHNE_27646.depot s700_800 11.00 libnss_dns DNS backend patch
      PHNE_27748.depot s700_800 11.00 Bind 4.9.7 components
- -->>  PHNE_27880.depot s700_800 11.04 (VVOS) Bind 4.9.7 components
- -->>  PHNE_27881.depot s700_800 11.04 (VVOS) libnss_dns
      PHNE_27647.depot s700_800 11.11 libnss_dns DNS backend patch
      PHNE_25140.depot s700_800 11.11 Bind-8.1.2 patch

     MD5 (PHNE_27762.depot) = 8e30ef19ed590f2554e1c373a189cd99
     cksum 1419159559 696320 PHNE_27762.depot

     MD5 (PHCO_26152.depot) = fbd411fb4ca5f392722415868ee8b6cb
     cksum 2238979170 9676800 PHCO_26152.depot

- -->> MD5 (PHNE_27879.depot) = 90a570964b5cf48dadcd427f69bfdd16
- -->> cksum 2889539873 747520 PHNE_27879.depot

     MD5 (PHNE_27646.depot) = f15f7f0dd5098b55df363007197b9fcb
     cksum 891782754 61440 PHNE_27646.depot

     MD5 (PHNE_27748.depot) = d71c42cba7af8b8dcf6301dee003ec9c
     3120592593 675840 PHNE_27748.depot

- -->> MD5 (PHNE_27880.depot) = ad00d99d2d1035bd5b090aa7545248b2
- -->> cksum 2286372957 686080 PHNE_27880.depot

- -->> MD5 (PHNE_27881.depot) = d53a774092f72e98cb62607b5882b576
- -->> cksum 1828722320 61440 PHNE_27881.depot

     MD5 (PHNE_27647.depot) = e110ecb2a69bd3b669f993c552e80c0c
     cksum 2185197379 102400 PHNE_27647.depot

     MD5 (PHNE_25140.depot) = 9c729b48c146dd636941b5a6a2e65ae1
     cksum 1959995259 655360 PHNE_25140.depot

     Note: On 10.20 the DNS API is contained in libc.  Programs
           which make DNS calls and are linked with libc.a
           must be relinked.  So far as is known HP delivers
           no such programs.
           Programs which are linked with ".a" libraries
            are statically linked.
           Statically linked programs may be tested as follows:

        strings -a suspect_program | grep "Too many addresses (%d)"

           If the program contains the string it may make
           DNS API calls and should be relinked with the
           fixed version of libc.a.

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(c) Copyright 2002 Hewlett-Packard Company
Hewlett-Packard Company shall not be liable for technical or
editorial errors or omissions contained herein. The information
in this document is subject to change without notice.
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herein are trademarks and/or service marks of Hewlett-Packard
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Version: PGP Personal Security 7.0.3


Yours truly,
HP S/W Security Team
WTEC Cupertino, California