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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2002.450 -- HEWLETT-PACKARD COMPANY SECURITY BULLETIN: HPSBUX0208-209 Sec. Vulnerability in DNS resolver libraries (rev. 1) 20 August 2002 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: DNS resolver libraries Vendor: Hewlett-Packard Operating System: HP-UX 11.11 HP-UX 11.00 Platform: HP9000 Series 700 HP9000 Series 800 Impact: Execute Arbitrary Code/Commands Denial of Service Access Required: Remote Ref: ESB-2002.424 Comment: This bulletin has been updated to include information on Bind-8.1.2 and libnss_dns. - --------------------------BEGIN INCLUDED TEXT-------------------- ----------------------------------------------------------------- **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 ----------------------------------------------------------------- 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. ------------------------------------------------------------------ **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. ------------------------------------------------------------------ **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:bind1@hprc.external.hp.com/ or: ftp://bind:bind1@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-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. 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 any way, is attributed to HP, and provided such reproduction and/or distribution is performed for non-commercial purposes. Any other use of this information is prohibited. HP is not liable for any misuse of this information by any third party. - -----End of Document ID: HPSBUX0208-209-------------------------------------- - --------------------------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 iQCVAwUBPWJjVSh9+71yA2DNAQFH+AP/d/gNMSUzlnYbccIYvJzb5/SJPMG3U6im fcx2a0IwNxG/1XuquyhBkx8Nr1ES4ASd4m72socbeduRdWl2skTPtw47ZJpOa6Hg bnS0VmYHz025b97XtcIaerwg+CUlCrHYQ3uqwb5NSIrMQ/QoVqzGHpogNd3di01O WzoS3C9DAyo= =JSB5 -----END PGP SIGNATURE-----