-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =============================================================================== >> CERT-NL, 01-Mar-2000 << >> All CERT-NL information has been moved to http://cert.surfnet.nl. Links << >> to CERT-NL information contained in this advisory are therefore outdated. << >> << >> CERT-NL also has stopped the CERT-CC-Mirror service. Due to this the << >> links to the CERT-CC mirror are obsolete. Visit the CERT-CC site for the << >> complete CERT-CC advisory texts: http://www.cert.org << =============================================================================== =============================================================================== Security Advisory CERT-NL =============================================================================== Author/Source : CERT-NL (Erik-Jan Bos) Index : S-94-20 Distribution : World Page : 1 Classification: External Version: Final Subject : SGI IRIX V4 serial_ports vulnerability Date : 04-Oct-94 =============================================================================== CERT-NL has received information that Version 4 of Silicon Graphics IRIX operating system contains a vulnerability. This vulnerability allows a user on your system to elevate their privilege level to root status. 1. Description The /usr/lib/vadmin/serial_ports program contains a vulnerability that allows a non-privileged user to gain root privileges. The program is used to set up the serial ports on your SGI IRIX system. The vulnerability only exists under Version 4 of IRIX. It was tested and verified under V4.0.5a. The program serial_ports does not exist under Version 5 of IRIX. The equivalent program /usr/Cadmin/bin/cports on Version 5 of IRIX does not exhibit the vulnerability. The information on how to exploit this vulnerability has been widely published. It is recommended that the action in Section 3 be applied immediately. 2. Impact Any non-privileged user logged in on your system may gain root privileges. 3. Proposed Solutions This solution need only be applied to IRIX Version 4 systems. The /usr/lib/vadmin/serial_ports program is used to initialise the data files for the serial ports on your system. It can be disabled by typing the following command as root: # /bin/chmod 700 /usr/lib/vadmin/serial_ports If you are not using the serial ports on your IRIX Version 4 system, then you can safely disable this program. If you are using serial ports and do not wish to change the configuration of those ports, then you can disable this program. If you intend changing the serial port configuration, you can still disable the serial_ports program. The change the serial port configuration, you can run the serial_ports program as root. - ---------------------------------------------------------------------------- CERT-NL received the information on this vulnerability from AUSCERT, the Australian Computer Emergency Response Team. CERT-NL therefore wishes to thank the colleagues from AUSCERT for bringing this information to the attention of CERT-NL. The AUSCERT team wishes to thank Jeffrey Olds of Silicon Graphics for his advice and cooperation in this matter. - ---------------------------------------------------------------------------- ============================================================================== CERT-NL is the Computer Emergency Response Team for SURFnet customers. SURFnet is the Dutch network for educational, research and related institutes. CERT-NL is a member of the Forum of Incident Response and Security Teams (FIRST). All CERT-NL material is available under: http://cert.surfnet.nl/ In case of computer or network security problems please contact your local CERT/security-team or CERT-NL (if your institute is NOT a SURFnet customer please address the appropriate (local) CERT/security-team). CERT-NL is one/two hour(s) ahead of UTC (GMT) in winter/summer, i.e. UTC+0100 in winter and UTC+0200 in summer (DST). Email: cert-nl@surfnet.nl ATTENDED REGULARLY ALL DAYS Phone: +31 302 305 305 BUSINESS HOURS ONLY Fax: +31 302 305 329 BUSINESS HOURS ONLY Snailmail: SURFnet bv Attn. CERT-NL P.O. Box 19035 NL - 3501 DA UTRECHT The Netherlands NOODGEVALLEN: 06 22 92 35 64 ALTIJD BEREIKBAAR EMERGENCIES : +31 6 22 92 35 64 ATTENDED AT ALL TIMES CERT-NL'S EMERGENCY PHONENUMBER IS ONLY TO BE USED IN CASE OF EMERGENCIES: THE SURFNET HELPDESK OPERATING THE EMERGENCY NUMBER HAS A *FIXED* PROCEDURE FOR DEALING WITH YOUR ALERT AND WILL IN REGULAR CASES RELAY IT TO CERT-NL IN AN APPROPRIATE MANNER. CERT-NL WILL THEN CONTACT YOU. =============================================================================== -----BEGIN PGP SIGNATURE----- Version: PGP 6.5.1i iQA/AwUBOL6WGDSYjBqwfc9jEQKQBwCfYn8dQlgjleFi2eX2y1Zt7B8GXQ4AoI7/ 7Z1J8UlkvPGmKpp1UMTZ2f3E =5cRP -----END PGP SIGNATURE-----