Security Vulnerability in DNS resolver libraries (rev. 1)

Security Vulnerability in DNS resolver libraries (rev. 1)

Post by Security Ale » Tue, 20 Aug 2002 22:11:40



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 **REVISED 01**
 HEWLETT-PACKARD COMPANY SECURITY BULLETIN: HPSBUX0208-209
 Originally issued: 12 Aug 2002
 Last revised: 19 Aug 2002
 SSRT2316 Security Vulnerability in DNS resolver libraries
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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.

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**REVISED 01**

PROBLEM: Potential buffer overflows in DNS resolver libraries.

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.

DAMAGE: Potential unauthorized access, denial of service.

SOLUTION: Until a product upgrade is available, download and
          install the preliminary fix, BIND920ver2.depot.
- -->>      Download and install the preliminary versions of
- -->>      the applicable patch.

MANUAL ACTIONS: Install BIND920ver2.depot.
- -->>            Install upgrade_bind812_v4.depot on 11.00.
- -->>            Install preliminary patch.

AVAILABILITY:  The depot is available now.
- -->>           The preliminary patches 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.

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**REVISED 01**
 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
    available.
- -->> Bind-8.1.2 is vulnerable.
- -->> The libnss_dns.1 library is vulnerable.

 B. Recommended solution

**REVISED 01**
- -->> The following preliminary fixes are available:

- -->>  HP-UX 11.11

- -->>   BIND920ver2.depot for 11.11
- -->>   PHNE_25140.depot s700_800 11.11 Bind-8.1.2 patch
- -->>   PHNE_26747.depot s700_800 11.11 libnss_dns

- -->>  HP-UX 11.00

- -->>   upgrade_bind812_v4.depot for 11.00
- -->>   PHNE_27646.depot s700_800 11.00 libnss_dns

- -->>I. Until a product upgrade is available, download and install
       the BIND920ver2.depot.

      1. Download BIND920ver2.depot.gz from the ftp site.
         This file is temporary and will be deleted when a
         product upgrade is available from itrc.hp.com.

        System:    hprc.external.hp.com  (192.170.19.51)
        Login:     bind
        Password:  bind1

        FTP Access: ftp://bind:bi...@hprc.external.hp.com/
                or: ftp://bind:bi...@192.170.19.51/

        file: BIND920ver2.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 BIND920ver2.depot.gz file to a protected
         directory and unpack it.
         If you wish to verify the md5 sum please refer to:

               HPSBUX9408-016
               Patch sums and the MD5 program

          The md5 sum for BIND920ver2.depot is:

  MD5 (BIND920ver2.depot) = b5c7a1d3c18c83d015edb56da2eb0080

          The cksum output is:

  1311390197 20582400 BIND920ver2.depot

      3. Install BIND920ver2.depot using swinstall.

**REVISED 01**
- -->>II. Until a product upgrade is available, download and install
- -->>    the upgrade_bind812_v4.depot for 11.00.  The instructions
- -->>    for BIND920ver2.depot above apply.

- -->>        file: upgrade_bind812_v4.depot.gz

- -->> MD5 (upgrade_bind812_v4.depot) =
- -->>                45edb888017394aa8a206fb8ac292a04
- -->> cksum upgrade_bind812_v4.depot
- -->> 330647597 1116160 upgrade_bind812_v4.depot

**REVISED 01**
- -->>  III. Download and install the appropriate preliminary patch
- -->>       from the ftp site listed above:

- -->>  PHNE_27646.depot s700_800 11.00 libnss_dns DNS backend patch
- -->>  PHNE_26747.depot s700_800 11.11 libnss_dns DNS backend patch
- -->>  PHNE_25140.depot s700_800 11.11 Bind-8.1.2 patch

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

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

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

 C. To subscribe to automatically receive future NEW HP Security
    Bulletins from the HP IT Resource Center via electronic
    mail, do the following:

    Use your browser to get to the HP IT Resource Center page
    at:

       http://itrc.hp.com

    Use the 'Login' tab at the left side of the screen to login
    using your ID and password.  Use your existing login or the
    "Register" button at the left to create a login, in order to
    gain access to many areas of the ITRC.  Remember to save the
    User ID assigned to you, and your password.

    In the left most frame select "Maintenance and Support".

    Under the "Notifications" section (near the bottom of
    the page), select "Support Information Digests".

    To -subscribe- to future HP Security Bulletins or other
    Technical Digests, click the check box (in the left column)
    for the appropriate digest and then click the "Update
    Subscriptions" button at the bottom of the page.

    or

    To -review- bulletins already released, select the link
    (in the middle column) for the appropriate digest.

    To -gain access- to the Security Patch Matrix, select
    the link for "The Security Bulletins Archive".  (near the
    bottom of the page)  Once in the archive the third link is
    to the current Security Patch Matrix. Updated daily, this
    matrix categorizes security patches by platform/OS release,
    and by bulletin topic.  Security Patch Check completely
    automates the process of reviewing the patch matrix for
    11.XX systems.

    For information on the Security Patch Check tool, see:
    http://www.software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/
    displayProductInfo.pl?productNumber=B6834AA"

    The security patch matrix is also available via anonymous
    ftp:

    ftp://ftp.itrc.hp.com/export/patches/hp-ux_patch_matrix/

    On the "Support Information Digest Main" page:
    click on the "HP Security Bulletin Archive".

 D. To report new security vulnerabilities, send email to

    security-al...@hp.com

    Please encrypt any exploit information using the
    security-alert PGP key, available from your local key
    server, or by sending a message with a -subject- (not body)
    of 'get key' (no quotes) to security-al...@hp.com.

    Permission is granted for copying and circulating this
    Bulletin to Hewlett-Packard (HP) customers (or the Internet
    community) for the purpose of alerting them to problems,
    if and only if, the Bulletin is not edited or changed in
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    Any other use of this information is prohibited. HP is not
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 ________________________________________________________________

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

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