-----BEGIN PGP SIGNED MESSAGE----- __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN IBM AIX portmir command Vulnerability October 29, 1997 21:00 GMT Number I-011 ______________________________________________________________________________ PROBLEM: Several vulnerabilities exist in the portmir command. PLATFORM: IBM AIX(r) 4.2.1 DAMAGE: Local users may become root. SOLUTION: Remove the setuid bit from /usr/sbin/portmir and apply the fixes below. ______________________________________________________________________________ VULNERABILITY The information on this vulnerability should be acted upon as ASSESSMENT: soon as possible to avoid possible unauthorized access. ______________________________________________________________________________ [ Start IBM Advisory ] ======= ============ ====== ====== ======= ============== ======= ======= === === ==== ====== ====== === =========== ======= ======= === =========== === ======= === === === ==== === ===== === ======= ============== ===== === ===== ======= ============ ===== = ===== EMERGENCY RESPONSE SERVICE SECURITY VULNERABILITY ALERT 29 October 1997 19:00 GMT Number: ERS-SVA-E01-1997:006.1 ============================================================================== VULNERABILITY SUMMARY VULNERABILITY: Buffer overflow and insecure log files in the AIX portmir command PLATFORMS: IBM AIX(r) 4.2.1 SOLUTION: Remove the setuid bit from /usr/sbin/portmir THREAT: Local users can become root ============================================================================== DETAILED INFORMATION I. Description Several vulnerabilities exist in the portmir command that can allow local Users to become root. This command was added in 4.2.1; therefore, 4.1 and 3.2 Are not vulnerable. II. Impact Local users can become root. III. Fixes A. How to alleviate the problem Run the following command (as root) to close this vulnerability until APARs can be applied: # chmod u-s /usr/sbin/portmir B. Official fix Apply the following fix to your system: APAR - IX71795 To determine if you have this APAR on your system, run the following command: instfix -ik IX71795 Or run the following command: lslpp -h bos.sysmgt.serv_aid Your version of bos.sysmgt.serv_aid should be 4.2.1.4 or later. C. To Order APARs may be ordered using Electronic Fix Distribution (via FixDist) or from the IBM Support Center. For more information on FixDist, reference URL: http://service.software.ibm.com/aixsupport/ or send e-mail to aixserv@austin.ibm.com with a subject of "FixDist". IV. 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All other trademarks are property of their respective holders. ============================================================================== IBM's Internet Emergency Response Service (IBM-ERS) is a subscription-based Internet security response service that includes computer security incident response and management, regular electronic verification of your Internet gateway(s), and security vulnerability alerts similar to this one that are tailored to your specific computing environment. By acting as an extension of your own internal security staff, IBM-ERS's team of Internet security experts helps you quickly detect and respond to attacks and exposures across your Internet connection(s). As a part of IBM's Business Recovery Services organization, the IBM Internet Emergency Response Service is a component of IBM's SecureWay(tm) line of security products and services. 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IBM-ERS is a Member Team of the Forum of Incident Response and Security Teams (FIRST), a global organization established to foster cooperation and response coordination among computer security teams worldwide. Copyright 1997 International Business Machines Corporation. The information in this document is provided as a service to customers of the IBM Emergency Response Service. Neither International Business Machines Corporation, Integrated Systems Solutions Corporation, 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 contained herein, or represents that its use would not infringe any privately owned rights. 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[ End IBM Advisory ] ______________________________________________________________________________ CIAC wishes to acknowledge the contributions of IBM 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: +1 510-422-8193 FAX: +1 510-423-8002 STU-III: +1 510-423-2604 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), call the CIAC voice number 510-422-8193 and leave a message, or call 800-759-7243 (800-SKY-PAGE) to send a Sky Page. CIAC has two Sky Page PIN numbers, the primary PIN number, 8550070, is for the CIAC duty person, and the secondary PIN number, 8550074 is 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://ciac.llnl.gov/ Anonymous FTP: ciac.llnl.gov (198.128.39.53) 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. 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@tholia.llnl.gov: subscribe list-name e.g., subscribe ciac-bulletin You will receive an acknowledgment email immediately with a confirmation that you will need to mail back to the addresses above, as per the instructions in the email. 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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) H-110: Samba Servers Vulnerability I-001: HP-UX Denial of Service via telnet Vulnerability I-002: Cisco CHAP Authentication Vulnerability I-003: HP-UX mediainit(1) Vulnerability I-004: NEC/UNIX "nosuid" mount option Vulnerability I-006: IBM AIX "xdat" Buffer Overflow Vulnerability I-007: Sun Solaris Vulnerabilities (nis_cachemgr, ftpd/rlogind, sysdef) I-008: Open Group OSF/DCE Denial-of-Service Vulnerability I-009: HP-UX CDE Vulnerability I-010: IBM AIX Vulnerabilities (libDtSvc.a, piodmgrsu, nslookup) -----BEGIN PGP SIGNATURE----- Version: 4.0 Business Edition iQCVAwUBNFplVbnzJzdsy3QZAQEmJAP/adybX4M9qvdWb7T1BbHD/d/IyVThlsFg 09UGWP+PMANGwldDbnBJsMneCerru+ydEJLg7cPcNBf6V5Pn/xBXsrrB6/8pRxWL cIOV1TT9BLT2iVRB34D9qowkc7dmnRzinsXcqMPVMUPc298+scosq6FB5Y7tv+0B VoCF2KZsjno= =qsS6 -----END PGP SIGNATURE-----