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- CA-91:02a REVISED CERT Advisory
- March 27, 1991
- SunOS in.telnetd Vulnerability
-
- - -------------------------------------------------------------------------
-
- *** THIS IS A REVISED CERT ADVISORY ***
- *** CONTAINS NEW INFORMATION AND A CORRECTION ***
-
-
- DESCRIPTION:
-
- The Computer Emergency Response Team/Coordination Center (CERT/CC) has
- obtained information from Sun Microsystems, Inc. regarding a vulnerability
- affecting SunOS 4.1 and 4.1.1 versions of in.telnetd on all Sun 3 and
- Sun 4 architectures. This vulnerability also affects SunOS 4.0.3 versions
- of both in.telnetd and in.rlogind on all Sun3 and Sun 4 architectures.
- To our knowledge, a vulnerability does not exist in the SunOS 4.1 and 4.1.1
- versions of in.rlogind. The vulnerability has been fixed by Sun Microsystems,
- Inc.
-
- This advisory has been revised to include information on the new patches
- available for SunOS 4.0.3. The CERT would also like to mention that the
- name of the compressed tarfile included in the previous CERT Advisory,
- CA-91:02, was incorrect. It was listed as 1001125-02.tar.Z and it should
- have been 100125-02.tar.Z. We regret any inconvenience this may have caused.
-
- Please be aware that the new compressed tarfile provided by Sun Microsystems,
- Inc. includes all of the patched files for SunOS 4.0.3, SunOS 4.1, and
- SunOS 4.1.1. That is, the tarfile contains the new patches for SunOS
- 4.0.3 as well as those files previously distributed in the 100125-02.tar.Z
- tarfile. The installation of the patch differs between SunOS 4.0.3
- and SunOS 4.1.x.
-
-
- IMPACT:
-
- The vulnerability allows a user on the system to gain unauthorized
- access to other accounts, including root.
-
-
- SOLUTION for SunOS 4.0.3 and 4.0.3c:
-
- Sun Microsystems, Inc. has patched versions of in.telnetd and in.rlogind
- available for SunOS 4.0.3 on all Sun 3 and Sun 4 architectures. The Sun
- Patch ID is 100125-03 which is needed when ordering the patch from a Sun
- Answer Center. In the US, telephone (800) USA-4SUN. The checksum of the
- compressed tarfile (filename 100125-03.tar.Z) is 17128 102. The compressed
- tarfile is available by anonymous FTP on uunet.uu.net (192.48.96.2) in
- sun-dist/100125-03.tar.Z. Please note: This compressed tarfile
- also includes patched versions of in.telnetd for SunOS 4.1 and 4.1.1.
- Please disregard these files.
-
-
- SunOS 4.0.3 patch installation instructions are as follows:
-
- # mv /usr/etc/in.telnetd /usr/etc/in.telnetd.FCS
- # mv /usr/etc/in.rlogind /usr/etc/in.rlogind.FCS
- # chmod 600 /usr/etc/in.telnetd.FCS
- # chmod 600 /usr/etc/in.rlogind.FCS
-
- (These four steps store the old versions as a precaution and change the
- file modes so that the old versions cannot be executed. After verifying
- the new versions, the old versions should be removed.)
-
-
- # cp sun{3,3x,4,4c}/{4.0.3,4.0.3c}/in.telnetd /usr/etc/in.telnetd
- # cp sun{3,3x,4,4c}/{4.0.3,4.0.3c}/in.rlogind /usr/etc/in.rlogind
-
- (Be sure to copy the appropriate versions for your architecture.)
-
-
- # chmod 711 /usr/etc/in.telnetd
- # chmod 711 /usr/etc/in.rlogind
- # chown root /usr/etc/in.telnetd
- # chown root /usr/etc/in.rlogind
- # chgrp staff /usr/etc/in.telnetd
- # chgrp staff /usr/etc/in.rlogind
- # kill {any executing in.telnetd and in.rlogind process(es) (SEE NOTE)}
-
- NOTE: Be careful in killing existing in.telnetd and in.rlogind processes,
- as they may be legitimate users attempting to login to the system.
-
- - -------------------------------------------------------------------------
-
-
- SOLUTION for SunOS 4.1 and 4.1.1:
-
- Sun Microsystems, Inc. has patched versions of in.telnetd available for
- SunOS 4.1 and 4.1.1 on all Sun 3 and Sun 4 architectures. The Sun
- Patch ID is 100125-03 which is needed when ordering the patch from a Sun
- Answer Center. In the US, telephone (800) USA-4SUN. The checksum of the
- compressed tarfile (filename 100125-03.tar.Z) is 17128 102. The compressed
- tarfile is available by anonymous FTP on uunet.uu.net (192.48.96.2) in
- sun-dist/100125-03.tar.Z. Please note: This tarfile includes patched
- versions of in.telnetd and in.rlogind for SunOS 4.0.3. Please disregard
- these files.
-
- Patch installation instructions are as follows:
-
- # mv /usr/etc/in.telnetd /usr/etc/in.telnetd.FCS
- # chmod 600 /usr/etc/in.telnetd.FCS
-
- (These two steps store the old version as a precaution and change the
- file mode to that the old version cannot be executed; after verifying
- the new version, the old version should be removed.)
-
- # cp sun{3,3x,4,4c}/4.1/in.telnetd /usr/etc/in.telnetd
-
- (Be sure to copy the appropriate version for your architecture.)
-
- # chmod 711 /usr/etc/in.telnetd
- # chown root /usr/etc/in.telnetd
- # chgrp staff /usr/etc/in.telnetd
- # kill {any executing in.telnetd process(es) (SEE NOTE)}
-
- NOTE: Be careful in killing existing in.telnetd processes, as they may
- be legitimate users attempting to login to the system.
-
- - -------------------------------------------------------------------------
- Computer Emergency Response Team/Coordination Center (CERT/CC)
- Software Engineering Institute
- Carnegie Mellon University
- Pittsburgh, PA 15213-3890
-
- Internet E-mail: cert@cert.org
- Telephone: 412-268-7090 24-hour hotline:
- CERT personnel answer 7:30a.m.-6:00p.m. EST.
- On call for emergencies during other hours.
-
- Past advisories and other computer security related information are available
- for anonymous ftp from the cert.org (192.88.209.5) system.
-
-
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