---FOR PUBLIC RELEASE --- -----BEGIN PGP SIGNED MESSAGE----- - --ERS-ALERT--ERS-ALERT--ERS-ALERT--ERS-ALERT--ERS-ALERT--ERS-ALERT--ERS-ALERT-- - ---EXTERNAL RELEASE---EXTERNAL RELEASE---EXTERNAL RELEASE---EXTERNAL RELEASE--- ======= ============ ====== ====== ======= ============== ======= ======= === === ==== ====== ====== === =========== ======= ======= === =========== === ======= === === === ==== === ===== === ======= ============== ===== === ===== ======= ============ ===== = ===== EMERGENCY RESPONSE SERVICE SECURITY VULNERABILITY ALERT 17 August 1999 13:00 GMT Number: ERS-SVA-E01-1999:003.1 =============================================================================== VULNERABILITY SUMMARY VULNERABILITY: The IBM C Set ++ for AIX Source Code Browser allows local and remote users to become root. PLATFORMS: C Set ++ for AIX Version 3 (5765-421) C Set ++ for AIX Version 2 (5765-186) SOLUTION: Disable the source code browser daemon (pdnsd). =============================================================================== DETAILED INFORMATION I. Description A buffer overflow vulnerability has been discovered in the Source Code Browser's Program Database Name Server Daemon (pdnsd) of versions 2 and 3 of IBM's C Set ++ for AIX. This vulnerability allows local and remote users to gain root access. To date, there are no known reports of this being exploited. II. Solutions A. Official fix IBM C Set ++ for AIX versions 2 and 3 are no longer supported and no APAR will be issued. Customers are encouraged to upgrade to a later compiler version. B. How to alleviate the problem The pdnsd daemon should be disabled by running the following commands as root: # rmitab browser # chown root.system /usr/lpp/xlC/browser/pdnsd # chmod 0 /usr/lpp/xlC/browser/pdnsd # /usr/lpp/xlC/browser/pdnsdkill III. Contact Information Comments regarding the content of this announcement can be directed to: security-alertat_private To request the PGP public key that can be used to encrypt new AIX security vulnerabilities, send email to security-alertat_private with a subject of "get key". If you would like to subscribe to the AIX security newsletter, send a note to aixservat_private with a subject of "subscribe Security". To cancel your subscription, use a subject of "unsubscribe Security". To see a list of other available subscriptions, use a subject of "help". IBM and AIX are a registered trademark of International Business Machines Corporation. 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. From hardware to software to consulting, SecureWay solutions can give you the assurance and expertise you need to protect your valuable business resources. To find out more about the IBM Internet Emergency Response Service, send an electronic mail message to ers-salesat_private, or call 1-800-599-9950. IBM-ERS maintains a site on the World Wide Web at http://www.ers.ibm.com/. Visit the site for information about the service, copies of security alerts, team contact information, and other items. IBM-ERS uses Pretty Good Privacy* (PGP*) as the digital signature mechanism for security vulnerability alerts and other distributed information. The IBM-ERS PGP* public key is available from http://www.ers.ibm.com/team-info/pgpkey.html. "Pretty Good Privacy" and "PGP" are trademarks of Philip Zimmermann. 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 1999 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, nor any of its employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, complete- ness, or usefulness of any information, apparatus, product, or process contained herein, or represents that its use would not infringe any 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 IBM or its subsidiaries. The views and opinions of authors expressed herein do not necessarily state or reflect those of IBM or its subsidiaries, and may not be used for advertising or product endorsement purposes. The material in this security alert may be reproduced and distributed, without permission, in whole or in part, by other security incident response teams (both commercial and non-commercial), provided the above copyright is kept intact and due credit is given to IBM-ERS. This security alert may be reproduced and distributed, without permission, in its entirety only, by any person provided such reproduction and/or distribution is performed for non-commercial purposes and with the intent of increasing the awareness of the Internet community. - ---EXTERNAL RELEASE---EXTERNAL RELEASE---EXTERNAL RELEASE---EXTERNAL RELEASE--- - --ERS-ALERT--ERS-ALERT--ERS-ALERT--ERS-ALERT--ERS-ALERT--ERS-ALERT--ERS-ALERT-- -----BEGIN PGP SIGNATURE----- Version: 2.7.1 iQCVAwUBN7lkE/WDLGpfj4rlAQH9vAP/d5E9EM33crMK3Ffdgn1z4vl3DK0aHANS +Yy+KfFWYvpjLj2VxMFMzZXpr/+513DeUElko27EXddcb6VWljYc3/CwJv3sAd6C CBpOUcZZcmY6DfqP/MTqKK3AWRKcjgEiBFxNEGPb+DBEdhNhDZ2JgA5gmKTPr/qC lJPwPlSbjMQ= =+MOk -----END PGP SIGNATURE-----
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