-----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 to CERT-NL information contained in this advisory are therefore outdated.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 (teun nijssen) Index : S-94-05 Distribution : World Page : 1 Classification: External Version: Final Subject : AIX/ESA v2.2 mail queue spooling directory Date : 28-Feb-94 =============================================================================== CERT-NL has received information concerning the default setting of the mail queue spooling directory in AIX/ESA v2.2 systems. By changing this default, the vulnerability can be removed. This vulnerability has only been reported to be present in AIX/ESA v2.2. - ----------------------------------------------------------------------------- I. Description The mail queue spooling directory (/var/spool/mqueue) in AIX/ESA v2.2 systems has mode 1777 (world writable) as default. II. Impact This vulnerability allows a local user to gain root access. III. Solution This vulnerability can be removed by changing the mode of /var/spool/mqueue by issuing the following commands: chgrp mail /var/spool/mqueue chmod g+s /var/spool/mqueue chmod o-w /var/spool/mqueue These commands leave the mail system in working order and closes the security hole. - --------------------------------------------------------------------------- CERT-NL thanks Harold van Aalderen of SARA for distributing the necessary information and solution. - --------------------------------------------------------------------------- ============================================================================== 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/AwUBOL6WEDSYjBqwfc9jEQK+CwCaAwm0ZQg2JnvlGGriJngDZ+J5o7QAn28G b94vX6k+UjNPigPtO3gLetMW =kh4K -----END PGP SIGNATURE-----