Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2002.579 -- HEWLETT-PACKARD COMPANY SECURITY BULLETIN: HPSBUX0208-209 Sec. Vulnerability in DNS resolver libraries (rev. 7) 17 October 2002 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: DNS Resolver Libraries Vendor: Hewlett-Packard Operating System: HP-UX 10.20 HP-UX 10.24 HP-UX 11.00 HP-UX 11.04 HP-UX 11.11 Platform: HP9000 Impact: Execute Arbitrary Code/Commands Denial of Service Access Required: Remote Ref: ESB-2002.505 - --------------------------BEGIN INCLUDED TEXT-------------------- Document ID: HPSBUX0208-209 Date Loaded: 20020811 Title: Sec. Vulnerability in DNS resolver libraries (rev. 7) ------------------------------------------------------------------ **REVISED 07** Source: HEWLETT-PACKARD COMPANY SECURITY BULLETIN: HPSBUX0208-209 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** MANUAL ACTIONS: Yes - NonUpdate 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 information. 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 available. 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 itrc.hp.com. System: hprc.external.hp.com (192.170.19.51) Login: bind Password: bind1 FTP Access: ftp://bind:bind1@hprc.external.hp.com/ or: ftp://bind:bind1@192.170.19.51/ 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: HPSBUX9408-016 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) = 45edb888017394aa8a206fb8ac292a04 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. - ------------------------------------------------------------------ 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-alert@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-alert@hp.com. ---------------------------------------------------------------- (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. Hewlett-Packard Company and the names of HP products referenced herein are trademarks and/or service marks of Hewlett-Packard Company. Other product and company names mentioned herein may be trademarks and/or service marks of their respective owners. ________________________________________________________________ - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to use any or all of this information is the responsibility of each user or organisation, and should be done so in accordance with site policies and procedures. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the original authors to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/Information/advisories.html If you believe that your system has been compromised, contact AusCERT or your representative in FIRST (Forum of Incident Response and Security Teams). Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key iQCVAwUBPa7fdyh9+71yA2DNAQE6dQP+JQiWUXQLwl5p+mSztuEVWR+NF5+96XqO 3sNUfC8ZAiC+YDCvat70KqKJKPkrMw1sfCDAZ5vEyz4up2NmKeONzRH8xqqVOklF 24qBTE/jW7ODRD7qu5gp7cEBTRzsmnqD8LLqCHh/yuOWtEf6EVQ2SlTv3UjjDPPh C0Ng6JDM5AI= =rq+0 -----END PGP SIGNATURE-----