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__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN HP-UX Vulnerabilities in elm and rdist Programs August 14, 1996 18:00 GMT Number G-36 ______________________________________________________________________________ PROBLEM: Vulnerabilities have been discovered in the elm and rdist programs running under HP-UX. PLATFORM: The elm vulnerability is found on HP 9000 series 300/400/700/800 systems running any version HP-UX 9.x or 10.x. The vulnerability in rdist is only in releases 10.0x, 10.10 and 10.20 of HP-UX running on HP 9000 series 700 and 800 systems. DAMAGE: The elm vulnerability allows user files to be modified by non-owners. The rdist vulnerability can allow an unauthorized user root access. SOLUTION: Apply the patches listed in the vendor section of the bulletin below. ______________________________________________________________________________ VULNERABILITY These vulnerabilities are widely known. It is highly ASSESSMENT: recommended that you apply these patches as soon as possible. ______________________________________________________________________________ [Begin HP Bulletin] =============================================================================== Document Id: [HPSBUX9608-037] Date Loaded: [08-08-96] Description: Security Vulnerability in elm =============================================================================== ------------------------------------------------------------------------- HEWLETT-PACKARD SECURITY ADVISORY: HPSBUX08-037, 08 August 1996 ------------------------------------------------------------------------- The information in the following Security Advisory 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 Advisory as soon as possible. _________________________________________________________________________ PROBLEM: Vulnerabilities in elm executable. PLATFORM: HP 9000 series 300/400/700/800 systems running any version HP-UX 9.X or 10.X. DAMAGE: User files can be modified by non-owners. When running a restricted shell escapes may be possible. SOLUTION: Apply patch PHCO_7204 (series 300/400,HP-UX 9.X), or PHNE_7342 (series 700/800, HP-UX 9.X), or PHNE_7343 (series 700/800, HP-UX 10.X). AVAILABILITY: All of the patches are available now. For BLS system patch availability please contact your support representative. _________________________________________________________________________ I. elm A. Background Based on information detailed in CERT(sm) Vendor-Initiated Bulletin VB-95:10 Hewlett-Packard has found problems in the version of elm shipped with currently supported HP-UX releases. B. Fixing the problem Hewlett-Packard has created the above patches using the information from the vendor. These vulnerabilities can be eliminated by installing the patches referenced herein. C. Impact of the patch The patches provide a new version of the necessary executables to fix the vulnerability. Installation instructions are contained within the patches. D. 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" E. 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. 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. ________________________________________________________________________ =============================================================================== Document Id: [HPSBUX9608-036] Date Loaded: [08-08-96] Description: Security Vulnerability in rdist =============================================================================== ------------------------------------------------------------------------- HEWLETT-PACKARD SECURITY BULLETIN: HPSBUX9608-036, 08 Aug 96 ------------------------------------------------------------------------- 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. _______________________________________________________________________ PROBLEM: Security vulnerability in rdist only in releases 10.0X, 10.10, & 10.20 of HP-UX. PLATFORM: HP 9000 Series 700 and 800s DAMAGE: A vulnerability in rdist exists allowing local users to gain root privileges. SOLUTION: Apply patches PHNE_8107 (series 700/800, HP-UX 10.00 & 10.01) and PHCO_7798 (series 700/800, HP_UX 10.00 & 10.01) or patch PHNE_7919 (series 700/800, HP-UX 10.10) PHNE_7920 (series 700/800, HP-UX 10.20) AVAILABILITY: All patches are available now, except PHNE_7920 which will be available after 8 August. _______________________________________________________________________ I. rdist Update A. Background A recent CERT advisory (CERT CA-96.14) more fully describes a vulnerability in the rdist utility. It has been found that specific HP-UX 10.XX releases have this vulnerability. B. Fixing the problem The vulnerability can be eliminated from releases 10.0, 10.01, 10.10, and 10.20 of HP-UX by applying the patches mentioned above. HP-UX releases prior to 10.X and after 10.20 (i.e., 10.30) are not vulnerable. Hewlett-Packard recommends that all customers concerned with the security of their HP-UX systems either apply the appropriate patch or change perform the actions described above as soon as possible. C. How to Install the Patch (for HP-UX 10.X) 1. Determine which patch is appropriate for your hardware platform and operating system: Both: PHNE_8107 for series 700/800, HP-UX 10.00 10.01 PHCO_7798 for series 700/800, HP_UX 10.00 10.01 or: PHNE_7919 for series 700/800, HP-UX 10.10 PHNE_7920 for series 700/800, HP-UX 10.20 2. Hewlett Packard's HP-UX patches are available via email and World Wide Web. To obtain a copy of the HP 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 process for downloading HP-UX patches 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 necessary patch(es) to your HP-UX system. 4. Examine /tmp/update.log for any relevant WARNINGs or ERRORs. [End HP Bulletin] _______________________________________________________________________________ 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. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. CIAC services are available to DOE, DOE contractors, and the NIH. 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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-26: IRIX Desktop Permissions Panel Vulnerability G-27: SCO Kernel Security Vulnerability G-28A: suidperl Vulnerability G-29: dip Program Vulnerability G-30: DEC Software Security Kits G-31: FreeBSD Security Vulnerabilities (ppp, rdist, and rz) G-32: HP-UX Vulnerabilities in expreserve, rpc.pcnfsd, rpc.statd G-33: rdist vulnerability G-34: HP-UX Vulnerabilities (netttune, SAM remote admin) G-35: SUN Microsystems Solaris vold Vulnerability 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