-----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 to CERT-NL information contained in this advisory are therefore outdated.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-93-16 Distribution : World Page : 1 Classification: External Version: Final Subject : UMN UNIX gopher and gopher+ Vulnerabilities Date : 09-Aug-93 =============================================================================== CERT-NL has received information concerning vulnerabilities in versions of the UMN UNIX gopher and gopher+ server and client available before August 6, 1993. Vulnerable versions were available on boombox.micro.umn.edu:/pub/gopher/Unix/gopher1.12s.tar.Z, boombox.micro.umn.edu:/pub/gopher/Unix/gopher2.03.tar.Z, and many other anonymous FTP sites mirroring these software versions. CERT-NL strongly recommends that any site using versions of UMN UNIX gopher and gopher+ dated prior to August 6, 1993 (including version 1.12, 1.12s, 2.0+, 2.03, and all earlier versions) immediately take corrective action. If you have further questions regarding UMN UNIX gopher or gopher+ software, send e-mail to: gopher@boombox.micro.umn.edu - --------------------------------------------------------------------------- I. Description Several vulnerabilities have been identified in UMN UNIX gopher and gopher+ when configured as a server or public access client. Intruders are known to have exploited these vulnerabilities to obtain password files. Other actions may also have been taken by intruders exploiting these vulnerabilities. CERT has already contacted those sites currently known to have been victims of these activities. However, sites may want to check for weak passwords, or consider changing passwords, after installing the new gopher software. II. Impact Anyone (remote or local) can potentially gain unrestricted access to the account running the public access client, thereby permitting them to read any files accessible to this account (possibly including /etc/passwd or other sensitive files). In certain configurations, anyone (remote or local) can potentially gain access to any account, including root, on a host configured as a server running gopherd. III. Solution Affected sites should consider disabling gopherd service and public gopher logins until they have installed the new software. New versions of the UMN UNIX gopher and gopher+ software have been released that provide bug fixes and correct these security problems. Sites can obtain these new versions via anonymous FTP from boombox.micro.umn.edu (134.84.132.2). The files are located in: Filename Size Checksum -------- ------ ----------- Gopher: /pub/gopher/Unix/gopher1.12S.tar.Z 306872 46311 300 Gopher+: /pub/gopher/Unix/gopher2.04.tar.Z 294872 29411 288 - --------------------------------------------------------------------------- CERT-NL wishes to thank CERT Coordination Center for supplying CERT-NL with their Advisory, which text is used in this CERT-NL advisory. The CERT Coordination Center wishes to thank Matt Schroth, Williams College, and others for informing us of these vulnerabilities. We would also like to thank Paul Lindner, University of Minnesota, for his quick response to these problems. - --------------------------------------------------------------------------- ============================================================================== 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/AwUBOL6WBzSYjBqwfc9jEQLccACdEbU16cVv24qb9JHSDWUuU0UuRKcAoLfX oFlZlcl0uWorZKeT2QvZ6ZlY =eCBS -----END PGP SIGNATURE-----