-----BEGIN PGP SIGNED MESSAGE-----
Content-Type: text/plain; charset=us-ascii
__________________________________________________________
The U.S. Department of Energy
Computer Incident Advisory Capability
___ __ __ _ ___
/ | /_\ /
\___ __|__ / \ \___
__________________________________________________________
INFORMATION BULLETIN
splitvt(1) vulnerability
January 9, 1995 2000 GMT Number G-08
______________________________________________________________________________
PROBLEM: A vulnerability has been discovered in splitvt(1) versions
prior to 1.6.3 which may allow local users to gain root
access.
PLATFORM: Slackware versions of Linux, also other Linux and UNIX
operating systems with splitvt installed (pre-1.6.3 versions)
DAMAGE: Users logged into a system may gain unauthorized root
privileges.
SOLUTION: Use the workaround contained in this bulletin to obtain an
updated patched version of splitvt.
AVAILABILITY: See the workaround that is contained in this bulletin
______________________________________________________________________________
VULNERABILITY Unprivileged users who are logged on to a system can use this
ASSESSMENT: vulnerability to gain unauthorized root privileges. An
exploit program for this vulnerability has been published
publically. CIAC advises that the workaround described below
be performed immediately.
______________________________________________________________________________
[The following information has been reprinted from the AUSCERT bulletin,
number AL-95.06a, January 3rd, 1996]
Information on the splitvt(1) vulnerability
A vulnerability has been discovered in the splitvt(1) utility which may allow
local users to gain root access. This utility is included in many
standard Linux distributions including, but not necessarily limited to,
numerous Slackware versions. The source code for this utility is publicly
available and operating systems other than Linux which have splitvt(1)
installed may also be vulnerable.
This vulnerability exists in splitvt(1) versions prior to 1.6.3.
Description
- -----------
The splitvt(1) utility is a publicly available program for running
multiple shells in a split window. A vulnerability exists in versions
prior to 1.6.3 which may allow users to gain root access. The version
may be identified using the command "splitvt -version".
The splitvt(1) utility is included as part of the standard installation
of numerous Slackware Linux distributions. Other Linux distributions
and sites which are not running Linux, but have splitvt(1) installed,
may also be vulnerable.
Workaround
- ----------
This vulnerability has been removed in splitvt version 1.6.3. Sites
that require splitvt(1) are encouraged to upgrade to this version. It
is available from:
ftp://dandelion.ceres.ca.gov/pub/splitvt
The MD5 checksum is:
MD5 (splitvt-1.6.3.tar) = eec2fe2c5b4a3958261197905a9d9c81
An interim solution until the official patch is installed is to restrict
the permissions and remove the setuid bit from splitvt(1). As root:
# chmod 700 /usr/bin/splitvt
Note: This workaround causes splitvt(1) to become unavailable for
use by non privileged users.
- ------------------------------------------------------------------------------
AUSCERT wishes to thank Sam Lantinga for his rapid response in addressing
this vulnerability and Alexander O. Yuriev for his assistance in this matter.
- ------------------------------------------------------------------------------
CIAC wishes to acknowledge the AUSCERT team for providing the information
contained in this bulletin.
- ------------------------------------------------------------------------------
CIAC, the Computer Incident Advisory Capability, is the computer
security incident response team for the U.S. Department of Energy (DOE) and
the backup team for the National Institute of Health (NIH). CIAC is located
at the Lawrence Livermore National Laboratory in Livermore, California. CIAC
is also a founding member of FIRST, the Forum of Incident Response and
Security Teams, a global organization established to foster cooperation and
coordination among computer security teams worldwide.
CIAC services are available to DOE, DOE contractors, and the NIH. CIAC can be
contacted at:
Voice: +1 510-422-8193
FAX: +1 510-423-8002
STU-III: +1 510-423-2604
E-mail: ciac@llnl.gov
For emergencies and off-hour assistance, DOE, DOE contractor sites, and the
NIH may contact CIAC 24-hours a day. During off hours (5PM - 8AM PST), call
the CIAC voice number 510-422-8193 and leave a message, or call 800-759-7243
(800-SKY-PAGE) to send a Sky Page. CIAC has two Sky Page PIN numbers, the
primary PIN number, 8550070, is for the CIAC duty person, and the secondary
PIN number, 8550074 is for the CIAC Project Leader.
Previous CIAC notices, anti-virus software, and other information are
available from the CIAC Computer Security Archive.
World Wide Web: http://ciac.llnl.gov/
Anonymous FTP: ciac.llnl.gov (128.115.19.53)
Modem access: +1 (510) 423-4753 (14.4K baud)
+1 (510) 423-3331 (14.4K baud)
CIAC has several self-subscribing mailing lists for electronic publications:
1. CIAC-BULLETIN for Advisories, highest priority - time critical information
and Bulletins, important computer security information;
2. CIAC-NOTES for Notes, a collection of computer security articles;
3. SPI-ANNOUNCE for official news about Security Profile Inspector (SPI)
software updates, new features, distribution and availability;
4. SPI-NOTES, for discussion of problems and solutions regarding the use of
SPI products.
Our mailing lists are managed by a public domain software package called
ListProcessor, which ignores E-mail header subject lines. To subscribe (add
yourself) to one of our mailing lists, send the following request as the
E-mail message body, substituting CIAC-BULLETIN, CIAC-NOTES, SPI-ANNOUNCE or
SPI-NOTES for list-name and valid information for LastName FirstName and
PhoneNumber when sending
E-mail to ciac-listproc@llnl.gov:
subscribe list-name LastName, FirstName PhoneNumber
e.g., subscribe ciac-notes OHara, Scarlett W. 404-555-1212 x36
You will receive an acknowledgment containing address, initial PIN, and
information on how to change either of them, cancel your subscription, or
get help.
PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing
communities receive CIAC bulletins. If you are not part of these communities,
please contact your agency's response team to report incidents. Your agency's
team will coordinate with CIAC. The Forum of Incident Response and Security
Teams (FIRST) is a world-wide organization. A list of FIRST member
organizations and their constituencies can be obtained by sending email to
docserver@first.org with an empty subject line and a message body containing
the line: send first-contacts.
This document was prepared as an account of work sponsored by an agency of the
United States Government. Neither the United States Government nor the
University of California nor any of their employees, makes any warranty,
express or implied, or assumes any legal liability or responsibility for the
accuracy, completeness, or usefulness of any information, apparatus, product,
or process disclosed, or represents that its use would not infringe privately
owned rights. Reference herein to any specific commercial products, process,
or service by trade name, trademark, manufacturer, or otherwise, does not
necessarily constitute or imply its endorsement, recommendation or favoring by
the United States Government or the University of California. The views and
opinions of authors expressed herein do not necessarily state or reflect those
of the United States Government or the University of California, and shall not
be used for advertising or product endorsement purposes.
LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC)
(F-26) OSF/DCE Security Hole
(F-27) Incorrect Permissions on /tmp
(F-28) Vulnerability in SunOS 4.1.* Sendmail (-oR option)
(G-1) Telnetd Vulnerability
(G-2) SunOS 4.1.X Loadmodule Vulnerability
(G-3) AOLGOLD Trojan Program
(G-4) X Authentication Vulnerability
(G-5) HP-UX FTP Vulnerability Bulletin
(G-6A) Win95 Vulnerabilities
(G-7) SGI Objectserver Vulnerability
RECENT CIAC NOTES ISSUED (Previous Notes available from CIAC)
Notes 07 - 3/29/95 A comprehensive review of SATAN
Notes 08 - 4/4/95 A Courtney update
Notes 09 - 4/24/95 More on the "Good Times" virus urban legend
Notes 10 - 6/16/95 PKZ300B Trojan, Logdaemon/FreeBSD, vulnerability
in S/Key, EBOLA Virus Hoax, and Caibua Virus
Notes 11 - 7/31/95 Virus Update, Hats Off to Administrators,
America On-Line Virus Scare, SPI 3.2.2 Released,
The Die_Hard Virus
Notes 12 - 9/12/95 Securely configuring Public Telnet Services, X Windows,
beta release of Merlin, Microsoft Word Macro Viruses,
Allegations of Inappropriate Data Collection in Win95
-----BEGIN PGP SIGNATURE-----
Version: 2.6.2
iQCVAwUBMPP4UrnzJzdsy3QZAQFTaAP/aeln5vu3yZ7OXeXnYAmLEGo11CsZRipE
cej8AE6R6q9jSbX9XnAMhTgLd6inrAtgNuML+YhdJnJU8mzSgSaBN7v3SalfNnJ2
90fxxlIKnV+APTFU/iPXZNCf4aPBzok2PnhLgaJLRh3OZHULiGMBa9u1Op8ZVd2/
INyMfZBg1x8=
=EA0d
-----END PGP SIGNATURE-----
TUCoPS is optimized to look best in Firefox® on a widescreen monitor (1440x900 or better).
Site design & layout copyright © 1986-2024 AOH
