-----BEGIN PGP SIGNED MESSAGE----- __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN talkd Buffer Overrun Vulnerability Update to talkd in Bulletin H-22 May 1, 1997 19:00 GMT Number H-22a ______________________________________________________________________________ PROBLEM: A vulnerability has been identified in the talkd communication program. PLATFORM: Hewlett-Packard DAMAGE: Local users may gain root privileges. SOLUTION: Apply patches as indicated below. ______________________________________________________________________________ VULNERABILITY Exploit details involving this vulnerability have been made ASSESSMENT: publicly available. ______________________________________________________________________________ This bulletin updates H-22 by adding patch information from Hewlett-Packard. The previous bulletin contains information about BSDI products. [ Start Hewlett-Packard Advisory ] Document ID: HPSBUX9704-061 Date Loaded: 970501 Title: Security Vulnerability in talkd for HP-UX 10.X only - ------------------------------------------------------------------------- HEWLETT-PACKARD SECURITY BULLETIN: #00061, 30 April 1997 - ------------------------------------------------------------------------- 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 talkd PLATFORM: HP 9000 Series 700/800s running only HP-UX 10.X releases. DAMAGE: Vulnerabilities exist allowing network users to gain root privileges. SOLUTION: Apply patch: PHNE_10042 for all platforms with HP-UX releases 10.0X/10.10 PHNE_10043 for all platforms with HP-UX release 10.20 AVAILABILITY: All patches are available now. - ------------------------------------------------------------------------- I. A. Background As referenced in CERT(sm) Advisory CA-97.04 on January 27, 1997 a vulnerability in the talkd executable has been discovered. The program talkd started shipping in HP-UX 10.X releases. B. Fixing the problem The vulnerability can be eliminated from HP-UX release 10.X by applying the appropriate patch. C. Recommended solution 1. Determine which patch is appropriate for your 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 to your HP-UX system. 4. Examine /var/adm/sw/swinstall.log, for any relevant WARNING's or ERROR's. D. Impact of the patch The patches for HP-UX release 10.X provide enhancements to the talkd executable to avoid this vulnerability. E. To subscribe to automatically receive future NEW HP Security Bulletins from the HP Electronic Support Center via electronic mail, do the following: User your browser to get to the HP Electronic Support Center page at: http://us-support.external.hp.com (for US, Canada, Asia-Pacific, & Latin-America) http://europe-support.external.hp.com (for Europe) Click on the Technical Knowledge Database, register as a user (remember to save the User ID assigned to you, and your password), and it will connect to a HP Search Technical Knowledge DB page. Near the bottom is a hyperlink to our Security Bulletin archive. Once in the archive there is another link to our current security patch matrix. Updated daily, this matrix is categorized by platform/OS release, and by bulletin topic. F. 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 Hewlett-Packard Advisory ] ______________________________________________________________________________ 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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If you are not part of these communities, please contact your agency's response team to report incidents. Your agency's team will coordinate with CIAC. The Forum of Incident Response and Security Teams (FIRST) is a world-wide organization. A list of FIRST member organizations and their constituencies can be obtained via WWW at http://www.first.org/. 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. 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LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) H-39: SGI IRIX fsdump Vulnerability H-40: DIGITAL Security Vulnerabilities (DoP, delta-time) H-41: Solaris 2.x eject Buffer Overrun Vulnerability H-42: HP MPE/iX with ICMP Echo Request (ping) Vulnerability H-44: Solaris 2.x fdformat Buffer Overflow Vulnerability H-45: Windows NT SAM permission Vulnerability H-46: Vulnerability in IMAP and POP H-47A: AOL4FREE.COM Trojan Horse Program Destroys Hard Drives H-48: Internet Information Server Vulnerability H-49: NLS Buffer Overflow Vulnerability -----BEGIN PGP SIGNATURE----- Version: 4.0 Business Edition iQCVAwUBM25us7nzJzdsy3QZAQGC+gP+LPQR3IQ4O7PyL+NLr+Nd4l2Qsefu5lK1 uGM/7PeOfjG6Ba6Yzk8vbjN0cpjzhA8GEhFi6iDUXFICZdlTNNFHxlrma/molebc Dq4MUy9NL3BcTC2OrDn/LSKgoAAVyT2WtymXC9VG75fmRnHRPBhvkknHHihejRzy gUmNo/a5H4s= =X+k9 -----END PGP SIGNATURE-----