__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN HP-UX Aserver Vulnerability January 3, 2000 19:00 GMT Number K-014 Revised March 23, 2000 19:00 GMT ______________________________________________________________________________ PROBLEM: A vulnerability has been identified in Aserver. PLATFORM: HP9000 Series 7/800 running HP-UX releases 10.X and 11.X. DAMAGE: An exploit to gain Root access has been made publicly available. SOLUTION: Implement procedure specified within HP bulletin. ______________________________________________________________________________ VULNERABILITY The risk is HIGH since root access can be acquired. ASSESSMENT: ______________________________________________________________________________ [ Start HP-UX Advisory ] Document ID: HPSBUX0001-108 Date Loaded: 20000105 Title: Security Vulnerability in Aserver (revised) ------------------------------------------------------------------------- **REVISED 01** HEWLETT-PACKARD COMPANY SECURITY ADVISORY: #00108, 01 Jan 2000 Last Revised: 17 March, 2000 ------------------------------------------------------------------------- The information in the following Security Advisory 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 Advisory as soon as possible. ------------------------------------------------------------------------- PROBLEM: /opt/audio/bin/Aserver can be used to gain root access. PLATFORM: HP9000 Series 7/800 running HP-UX releases 10.X and 11.X DAMAGE: Root access is possible. SOLUTION: **REVISED 02** Change the Aserver permissions. AVAILABILITY: This advisory will be updated when patches are available. CHANGE SUMMARY: This revision contains revised permission recommendations. ------------------------------------------------------------------------- I. A. Background A procedure to use /opt/audio/bin/Aserver to gain root access has been made public. B. Recommended solution **REVISED 01** | The need for suid permissions is being reviewed. | The only requirement for suid currently identified | is to allow any user to force a restart of the Aserver. | This feature may be eventually be removed. Until a | patch is available the recommended solution, as root | is: | chmod 555 /opt/audio/bin/Aserver **REVISED 02** || Until a patch is available that fixes the problem || installing an Aserver patch will restore the original || permissions. It is safer to set the 555 permissions || each time the system is started. One way to do that || is to create /sbin/rc2.d/S769audio with 555 permissions || containing the following script: || ||#!/sbin/sh || ||PATH=/sbin:/usr/sbin:/usr/bin ||export PATH || ||case $1 in ||start_msg) || echo "chmod 555 /opt/audio/bin/Aserver" || ;; || ||'start') || chmod 555 /opt/audio/bin/Aserver || ;; || ||*) || echo "usage: $0 start" || ;; ||esac || ||exit 0 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://us-support.external.hp.com (for US, Canada, Asia-Pacific, & Latin-America) http://europe-support.external.hp.com (for Europe) Under the Maintenance and Support Menu (Electronic Support Center): click on the "more..." link. Then - To -subscribe- to future HP Security Bulletins, or To -review- bulletins already released click on "Support Information Digests" near the bottom of the page, under "Notifications". Login with your user ID and password (or register for one). (Remember to save the User ID assigned to you, and your password). On the "Support Information Digest Main" page: click on the "HP Security Bulletin Archive". Once in the archive the third link is to our current Security Patch Matrix. Updated daily, this matrix categorizes security patches by platform/OS release, and by bulletin topic. The security patch matrix is also available via anonymous ftp: us-ffs.external.hp.com ~ftp/export/patches/hp-ux_patch_matrix 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 advisory to Hewlett-Packard (HP) customers (or the Internet community) for the purpose of alerting them to problems, if and only if, the advisory 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: HPSBUX0001-108-------------------------------------- [ End HP-UX 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. CIAC can be contacted at: Voice: +1 925-422-8193 FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@llnl.gov For emergencies and off-hour assistance, DOE, DOE contractor sites, and the NIH may contact CIAC 24-hours a day. During off hours (5PM - 8AM PST), use one of the following methods to contact CIAC: 1. Call the CIAC voice number 925-422-8193 and leave a message, or 2. Call 888-449-8369 to send a Sky Page to the CIAC duty person or 3. Send e-mail to 4498369@skytel.com, or 4. Call 800-201-9288 for the CIAC Project Leader. Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ (or http://ciac.llnl.gov -- they're the same machine) Anonymous FTP: ftp.ciac.org (or ciac.llnl.gov -- they're the same machine) Modem access: +1 (925) 423-4753 (28.8K baud) +1 (925) 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. SPI-ANNOUNCE for official news about Security Profile Inspector (SPI) software updates, new features, distribution and availability; 3. 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 Majordomo, which ignores E-mail header subject lines. To subscribe (add yourself) to one of our mailing lists, send the following request as the E-mail message body, substituting ciac-bulletin, spi-announce OR spi-notes for list-name: E-mail to ciac-listproc@llnl.gov or majordomo@rumpole.llnl.gov: subscribe list-name e.g., subscribe ciac-bulletin You will receive an acknowledgment E-mail immediately with a confirmation that you will need to mail back to the addresses above, as per the instructions in the E-mail. This is a partial protection to make sure you are really the one who asked to be signed up for the list in question. If you include the word 'help' in the body of an E-mail to the above address, it will also send back an information file on how to subscribe/unsubscribe, get past issues of CIAC bulletins via E-mail, etc. PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing communities receive CIAC bulletins. 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. 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. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC) K-004: Microsoft "Excel SYLK" Vulnerability K-005: Microsoft "Virtual Machine Verifier" Vulnerability K-006: Microsoft - Improve TCP Initial Sequence Number Randomness K-007: Multiple Vulnerabilities in BIND K-008: ExploreZip (packed) Worm K-009: Qpopper Buffer Overflow Vulnerability K-010: Solaris Snoop Buffer Overflow Vulnerability K-011: Buffer Overflow Vulnerabilities in SSH Daemon and RSAREF2 K-012: Cisco Cache Engine Authentication Vulnerabilities K-013: Buffer Overflow in Sun Solstic AdminSuite Daemon sadmind