-----BEGIN PGP SIGNED MESSAGE----- - -------------------------------------------------------------- HERT - Hacker Emergency Response Team alertat_private - http://www.hert.org Advisory: #00002 Title: lsof Date: 17 February 1999 Summary: Buffer overflow in lsof version 4.40 and prior IMPACT: Local users may obtain root priviledge. Author: Mariusz Tmoggie Marcinkiewicz <tmoggieat_private> Test Exploit: kil3rat_private - --------------------------------------------------------------- Copyright (C) 1999 Hacker Emergency Response Team Permission is granted to reproduce and distribute HERT advisories in their entirety, provided the HERT PGP signature is included and provided the alert is used for noncommercial purposes and with the intent of increasing the aware- ness of the Internet community. This advisory is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 1. Background: lsof - list open files Lsof lists information about files opened by processes for most UNIX dialects. When lsof is setuid-root or setgid kmem, it is vulnerable to a buffer overflow that will lead to direct root compromise or root compromise thru live kernel patching. The paradox is that lsof is a great security tool for administrators and we encourage its uses as long as it is NOT setuid-root or setgid. Test exploit code for this vulnerability was developped by kil3rat_private and will be made available to lsof author, HERT collaborators, sponsors and partners. 2. Distributions known to be affected. OpenBSD 2.4's ports facility retrieves and builds lsof package setgid kmem. FreeBSD's ports facility retrieves and builds lsof package setgid kmem. SuSe Linux ships lsof setgid kmem. Debian GNU/Linux 2.0 ships lsof setgid kmem. Redhat Linux 5.2 ships lsof setgid kmem. 3. Recommendations Fix: chmod 0755 lsof To subscribe to the HERT Alert mailing list, email alertat_private with subscribe in the body of the message. Contact hertat_private for more information. The HERT PGP public key is available at ftp://ftp.hert.org/pub/HERT_PGP.key To report a vulnerability: http://www.hert.org/vul_reporting_form We would like to thank the individuals who donates some of their time to HERT. HERT is a non-profit international organisation based in France. If you wish to join the HERT effort please send a note to hertat_private - -- Please respect the privacy of this mailing list. To UNSUBSCRIBE, email to hert-private-requestat_private with "unsubscribe" in the body. Trouble? Contact listmasterat_private -----BEGIN PGP SIGNATURE----- Version: 2.6.3ia Charset: latin1 iQCVAwUBNss8D7iV3oeHg1NdAQGHZwP+L76JOU2iHtvl2i3AHP3VDdEJ6W8M5zjf vVWDpQY7z4qmW4Ai/D5mnzeRwUey8W9imkoY4J4cF3/O+s/70+rsbwAKsmVgztBm DjhdWfMl/yz0ZT8zATJV+YVGtPQsmzvPbZR7YWOQh7oQQyPwzQXkswHkTB24Fsdg ehmkQnF1N9c= =Ohr4 -----END PGP SIGNATURE-----
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