-----BEGIN PGP SIGNED MESSAGE----- ============================================================================= CERT* Vendor-Initiated Bulletin VB-97.16 December 17, 1997 Topic: CrackLib Source: Alec Muffett <alecmat_private> To aid in the wide distribution of essential security information, the CERT Coordination Center is forwarding the following information from Alec Muffett. He urges you to act on this information as soon as possible. If you have any questions or need further information, please contact Alec directly or your vendor. Copies of cracklib26_small.tgz and cracklib26_small.diff have also been archived at ftp://ftp.cert.org/pub/tools/cracklib/ =======================FORWARDED TEXT STARTS HERE============================ - -----BEGIN PGP SIGNED MESSAGE----- ****************************************************************************** Topic: CrackLib Source: Alec Muffett <alecmat_private> - - -------------------------------- Problem: Vulnerability in CrackLib v2.5 I. Description CrackLib is a freely-available software library that provides systems and application programmers with some control to dissuade users from utilising easily-guessable passwords as authentication tokens. A weakness in a published version of CrackLib (v2.5, dated 1993) may be open to exploitation on Unix systems utilising CrackLib in setuid-root software, leading to compromise of system privileges. II. Impact A bug in CrackLib v2.5 *may* be exploitable to obtain root privileges when logged on machines where CrackLib is installed as part of a SUID program, such as "/bin/passwd". This problem will also impact systems where CrackLib is part of the PAM (pluggable authentication module) installation; where you are using a commercial operating system that utilises CrackLib (typically this applies to some Linux and FreeBSD distributions) you are advised to contact your vendor for a patch. III. Solution A upgraded/fixed version of CrackLib - v2.6 - is available from the following website, together with patches for the v2.5 software: http://www.users.dircon.co.uk/~crypto/ MD5-signatures filenames -------------- --------- 7181205d70afcf75bb2240678b6be855 cracklib26_small.tgz 247ad535f3e84bf586f7c31197ad1774 cracklib26_small.tgz.asc 3933d0b56695f38535a5be3b57ccb60f cracklib26_small.diff ec0e3714bc95ab2f2352a4438de17e7c cracklib26_small.diff.asc ...and contact information is also available from that website. ****************************************************************************** - -----BEGIN PGP SIGNATURE----- Version: 2.6ui iQCVAwUBNJcC8SkVdfDiK/dBAQH/cgP/XOrNN87QJ7/OzORHsa4wumVaiJ900fiM htLGtlQB3zJZJHxN9p3zPZteU45RQcW3CIYCKJpwIfc1jclgQb94nZyKXI+T86Yc Yg/jmK30dIqYDf5mRgKr8dh2IGICU+GEq8OE1MfqAa4r09MJ7VmhmNTZxp/09a8c QNxsRXFm4qE= =/6eR - -----END PGP SIGNATURE----- ========================FORWARDED TEXT ENDS HERE============================= If you believe that your system has been compromised, contact the CERT Coordination Center or your representative in the Forum of Incident Response and Security Teams (FIRST). See http://www.first.org/team-info/. We strongly urge you to encrypt any sensitive information you send by email. The CERT Coordination Center can support a shared DES key and PGP. Contact the CERT staff for more information. Location of CERT PGP key ftp://ftp.cert.org/pub/CERT_PGP.key CERT Contact Information - ------------------------ Email certat_private Phone +1 412-268-7090 (24-hour hotline) CERT personnel answer 8:30-5:00 p.m. EST (GMT-5)/EDT(GMT-4), and are on call for emergencies during other hours. Fax +1 412-268-6989 Postal address CERT Coordination Center Software Engineering Institute Carnegie Mellon University Pittsburgh PA 15213-3890 USA CERT publications, information about FIRST representatives, and other security-related information are available from http://www.cert.org/ ftp://ftp.cert.org/pub/ CERT advisories and bulletins are also posted on the USENET newsgroup comp.security.announce To be added to our mailing list for CERT advisories and bulletins, send your email address to cert-advisory-requestat_private In the subject line, type SUBSCRIBE your-email-address * Registered U.S. Patent and Trademark Office. The CERT Coordination Center is part of the Software Engineering Institute (SEI). The SEI is sponsored by the U. S. Department of Defense. This file: ftp://ftp.cert.org/pub/cert_bulletins/VB-97.16.CrackLib -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBNJfl/XVP+x0t4w7BAQHJygQAnJYtrDIb2QEQFuUBw8dZm+LEGW95YsOC 0O3CTuKOdrlpFVRXiRtp/qj6kS+1Z9YTkcvC9n6XED+LtuuAhtuaLcHOuNFNR21X 4gsHdYofJYUdnbte5NDJ6rNzRTUTZ5v/4FupVSbTpHdDzBcm0WrwpSOR97IXdGUM axaJdgSg2nc= =msyS -----END PGP SIGNATURE-----
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