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- CA-93:12 CERT Advisory
- September 16, 1993
- Novell LOGIN.EXE Vulnerability
-
- - ---------------------------------------------------------------------------
-
- The CERT Coordination Center has received information concerning a security
- vulnerability in Novell's NetWare 4.x login program (LOGIN.EXE). This
- vulnerability affects NetWare 4.0 and 4.01. It does not affect NetWare 2.x,
- NetWare 3.x, or Netware for UNIX.
-
- Novell is making available a security enhancement to the login program for
- NetWare 4.x. CERT strongly recommends that sites using of Novell NetWare 4.X
- replace their current LOGIN.EXE program on all affected systems with this
- security-enhanced version as soon as possible.
-
- - ---------------------------------------------------------------------------
- I. Description:
-
- A security vulnerability exists in LOGIN.EXE in Novell NetWare 4.X.
- In some environments, a user's name and password may be temporarily
- written to disk.
-
- II. Impact:
-
- User accounts may be readily compromised.
-
- III. Solution:
-
- NetWare 4.x sites should obtain and install on all affected systems
- the security-enhanced LOGIN.EXE program. CERT strongly recommends that
- sites replace their current LOGIN.EXE with the security-enhanced version
- as soon as possible.
-
- This new file is available via anonymous FTP from first.org. The files
- are located in:
-
- Filename Size Checksum
- -------- ------ -----------------------------
- /pub/software/seclog.exe 166276 00193 163 (Standard UNIX Sum)
- 58886 325 (System V Sum)
-
- This file is also available at no charge through NetWare resellers,
- on NetWire in library 14 of the NOVLIB forum, or by calling
- +1-800-NETWARE. NetWare customers outside the U.S. may call
- Novell at +1-303-339-7027 or +31-55-384279 or may fax a request for
- SECLOG.EXE v4.02 to Novell at +1-303-330-7655 or +31-55-434455. Fax
- requests should include company name, contact name, postal address,
- and phone number.
-
- The distribution SECLOG.EXE is a self-extracting archive that
- contains a patched file and a text file of installation instructions.
- The patch file (LOGIN.EXE) and the text file (SECLOG.TXT) are created
- by executing the distribution file SECLOG.EXE. After extracting the
- files, the dir command should produce the following output:
-
- SECLOG EXE 166276 xx-xx-xx xx:xxx
- LOGIN EXE 354859 08-25-93 11:43a
- SECLOG TXT 5299 09-02-93 11:16a
-
- Note that the date and time shown for SECLOG.EXE will reflect when
- this file was created on your system.
-
- To install the patch, follow the directions contained in the text file
- SECLOG.TXT.
-
- After installing the patch, sites should instruct all users to change
- their passwords.
-
- - ---------------------------------------------------------------------------
- The CERT Coordination Center would like to thank Karyn Pichnarczyk and
- the contribution of CIAC to this advisory. We would also like to
- acknowledge Richard Colby of Chem Nuclear Geotech, Inc., for reporting
- this vulnerability to CIAC, and Novell for their efforts in the
- resolution of this vulnerability.
- - ---------------------------------------------------------------------------
-
- If you believe that your system has been compromised, contact the CERT
- Coordination Center or your representative in FIRST (Forum of Incident
- Response and Security Teams).
-
- Internet E-mail: cert@cert.org
- Telephone: 412-268-7090 (24-hour hotline)
- CERT personnel answer 8:30 a.m.-5:00 p.m. EST(GMT-5)/EDT(GMT-4),
- and are on call for emergencies during other hours.
-
- CERT Coordination Center
- Software Engineering Institute
- Carnegie Mellon University
- Pittsburgh, PA 15213-3890
-
- Past advisories, information about FIRST representatives, and other
- information related to computer security are available for anonymous FTP
- from cert.org (192.88.209.5).
-
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