-----BEGIN PGP SIGNED MESSAGE----- __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN HP-UX Ping Vulnerability November 4, 1996 11:00 GMT Number H-04 ______________________________________________________________________________ PROBLEM: A vulnerability exists with certain ICMP echo requests (ping) that can cause an HP-UX system to reboot. PLATFORM: HP-UX 9.x and 10.x DAMAGE: External users can cause a system to reboot. SOLUTION: Apply the system patches recommended by HP. ______________________________________________________________________________ VULNERABILITY Any unpatched HP-UX system that answers Ping requests can be ASSESSMENT: shut down by an external user. ______________________________________________________________________________ HP-UX Ping Vulnerability The following advisory was issued by Hewlett-Packard concerning the vulnerability with incoming Ping packets. Users should follow the instructions contained in this bulletin and install the indicated patch. ======================================================================== - ------------------------------------------------------------------------ HEWLETT-PACKARD SECURITY BULLETIN: #000040, 30 October 1996 - ------------------------------------------------------------------------ Hewlett-Packard recommends that the information in the following Security Bulletin should be acted upon as soon as possible. Hewlett- Packard 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. 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. _______________________________________________________________________ PROBLEM: Vulnerability with specific incoming ICMP Echo Request (ping) packets. PLATFORM: HP9000 Series 700 and 800 systems. DAMAGE: Vulnerability makes it possible for an external user to cause a system reboot. SOLUTION: Apply the following patch: Patch Name(Platform/OS) | Notes --------------------------+---------------------------------- PHNE_9027 (s700 9.01) : PHNE_7704 must first be installed PHNE_9028 (s700 9.03/5/7) : PHNE_7252 must first be installed PHNE_9030 (s700 10.00) : No patch dependencies PHNE_9032 (s700 10.01) : PHNE_8168 must first be installed PHNE_9034 (s700 10.10) : PHNE_8063 must first be installed PHNE_9036 (s700 10.20) : No patch dependencies --------------------------+---------------------------------- PHNE_8672 (s800 9.00) : PHNE_7197 must first be installed PHNE_9029 (s800 9.04) : PHNE_7317 must first be installed PHNE_9031 (s800 10.00) : No patch dependencies PHNE_9033 (s800 10.01) : PHNE_8169 must first be installed PHNE_9035 (s800 10.10) : PHNE_8064 must first be installed PHNE_9037 (s800 10.20) : No patch dependencies --------------------------+---------------------------------- Due to the critical nature of this defect, HP is introducing this as a non-cumulative patch. As a result, in cases where a dependency exists, the current ARPA Transport cumulative patch will need to be installed first. The two can be installed in the same session to minimize system downtime, but the prerequisite patch must be loaded first. Installation will fail if this is not the case. AVAILABILITY: All patches are available now. _______________________________________________________________________ I. Update A. Problem description A recent mailing list disclosure described a vulnerability in which specific, illegally formatted, incoming ICMP Echo Request (ping) traffic could cause a system reboot on some HP9000 Series 700, and 800 systems running HP-UX releases 9.X and 10.X. HP9000 Series 300 and 400 systems have not been found to be vulnerable. B. Fixing the problem The vulnerability can be eliminated from HP-UX releases 9.X and 10.X by applying either one or two patches. C. How to Install the Patch: 1. Determine which patch(es) are appropriate for your hardware platform and operating system. 2. Hewlett-Packard's HP-UX patches are available via email and the World Wide Web To obtain a copy of the Hewlett-Packard SupportLine email service user's guide, send the following in the TEXT PORTION OF THE MESSAGE to support@us.external.hp.com (no Subject is required): send guide The users guide explains the HP-UX patch downloading process via email and other services available. World Wide Web service for downloading of patches is available via our URL: (http://us.external.hp.com) 3. Apply the patch(es) to your HP-UX system. In cases where a dependency exists, the current ARPA Transport cumulative patch will need to be installed first. The two can be installed in the same session to minimize system downtime, but the prerequisite patch must be loaded first. Installation will fail if this is not the case. 4. Examine /tmp/update.log (9.X), or /var/adm/sw/swinstall.log (10.X), for any relevant WARNINGs or ERRORs. D. Impact The patches for HP-UX releases 9.X and 10.X provide enhancements in the ARPA Transport stack to avoid this vulnerability. E. HP SupportLine To subscribe to automatically receive future NEW HP Security Bulletins from the HP SupportLine mail service via electronic mail, send an email message to: support@us.external.hp.com (no Subject is required) Multiple instructions are allowed in the TEXT PORTION OF THE MESSAGE, here are some basic instructions you may want to use: To add your name to the subscription list for new security bulletins, send the following in the TEXT PORTION OF THE MESSAGE: subscribe security_info To retrieve the index of all HP Security Bulletins issued to date, send the following in the TEXT PORTION OF THE MESSAGE: send security_info_list To get a patch matrix of current HP-UX and BLS security patches referenced by either Security Bulletin or Platform/OS, put the following in the text portion of your message: send hp-ux_patch_matrix World Wide Web service for browsing of bulletins is available via our URL: http://us.external.hp.com Choose "Support news", then under Support news, choose "Security Bulletins" F. To report new security vulnerabilities, send email to security-alert@hp.com Please encrypt 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 ______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Hewlett Packard for the information contained in this bulletin. ______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. 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World Wide Web: http://ciac.llnl.gov/ Anonymous FTP: ciac.llnl.gov (128.115.19.53) Modem access: +1 (510) 423-4753 (28.8K baud) +1 (510) 423-3331 (28.8K baud) CIAC has several self-subscribing mailing lists for electronic publications: 1. CIAC-BULLETIN for Advisories, highest priority - time critical information and Bulletins, important computer security information; 2. CIAC-NOTES for Notes, a collection of computer security articles; 3. SPI-ANNOUNCE for official news about Security Profile Inspector (SPI) software updates, new features, distribution and availability; 4. SPI-NOTES, for discussion of problems and solutions regarding the use of SPI products. Our mailing lists are managed by a public domain software package called ListProcessor, which ignores E-mail header subject lines. 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A list of FIRST member organizations and their constituencies can be obtained by sending email to docserver@first.org with an empty subject line and a message body containing the line: send first-contacts. This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. 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LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) G-42: Vulnerability in WorkMan Program G-43: Vulnerabilities in Sendmail G-44: SCO Unix Vulnerability G-45: Vulnerability in HP VUE G-46: Vulnerabilities in Transarc DCE and DFS G-47: Unix FLEXlm Vulnerabilities G-48: TCP SYN Flooding and IP Spoofing Attacks H-01: Vulnerabilities in bash H-02: SUN's TCP SYN Flooding Solutions H-03: HP-UX_suid_Vulnerabilities RECENT CIAC NOTES ISSUED (Previous Notes available from CIAC) Notes 07 - 3/29/95 A comprehensive review of SATAN Notes 08 - 4/4/95 A Courtney update Notes 09 - 4/24/95 More on the "Good Times" virus urban legend Notes 10 - 6/16/95 PKZ300B Trojan, Logdaemon/FreeBSD, vulnerability in S/Key, EBOLA Virus Hoax, and Caibua Virus Notes 11 - 7/31/95 Virus Update, Hats Off to Administrators, America On-Line Virus Scare, SPI 3.2.2 Released, The Die_Hard Virus Notes 12 - 9/12/95 Securely configuring Public Telnet Services, X Windows, beta release of Merlin, Microsoft Word Macro Viruses, Allegations of Inappropriate Data Collection in Win95 Notes 96-01 - 3/18/96 Java and JavaScript Vulnerabilities, FIRST Conference Announcement, Security and Web Search Engines, Microsoft Word Macro Virus Update -----BEGIN PGP SIGNATURE----- Version: 4.0 Business Edition iQCVAgUBMn50YrnzJzdsy3QZAQGB+AQA23mccLmDyws0oaEDSmY0gyXu7w3m0Nag +BWpUtmALCLODc3aO5z0ctZ0d517v476wprBMn4ZcisCf50KDrGlwcIJbuJ+M5si lL2fcyINlfyyrSIKFIbohoXT5KQ/boNX1XkHGQnnA0XuDqWbHw3+zRmDwD6X5hGx wsEL+uI7hvI= =/tiR -----END PGP SIGNATURE-----