TUCoPS :: SCO :: ciacg044.txt

SCO Unix Vulnerability


                       The U.S. Department of Energy
                    Computer Incident Advisory Capability
                           ___  __ __    _     ___
                          /       |     /_\   /
                          \___  __|__  /   \  \___

                             INFORMATION BULLETIN

                             SCO Unix Vulnerability

September 18, 1996 14:00 GMT                                       Number G-44
PROBLEM:       A problem in a particular system call may allow unauthorized
               access to a system.
PLATFORM:      Any system running SCO UnixWare release 2.0.x and 2.1.0.
DAMAGE:        By exploiting this vulnerability, a user can obtain
               root access.
SOLUTION:      Apply the patches and/or workarounds provided in the vendor
               bulletin below.
VULNERABILITY  These vulnerabilities are widely known.

[Begin SCO Bulletin]

SCO Security Bulletin 96:002
September 4, 1996
Patch for system call security issue
- ---------------------------------------------------------------------------

The Santa Cruz Operation has discovered the following problem present in
our software:

I.   Description

     A problem in a particular system call may allow unauthorized
     access to the system. The resulting access may lead to unauthorized
     root access to the system.

II.  Impact

     Any user with an account on the system may be able to gain
     unauthorized access to system or user files, which may then lead to
     unauthorized root access.

III. Releases

     This problem exists on the following releases of SCO products:

        SCO(R) UnixWare(R) release 2.0.x and 2.1.0

IV. Solution

     SCO is providing Program Temporary Fix (PTF) 3063 to address the
     issue. This PTF is available for SCO UnixWare release 2.1.0. SCO intends
     to release a PTF for SCO UnixWare release 2.0.3 in the near future.

     A workaround for users of SCO UnixWare release 2.0.x or for those
     who are not yet able to install this PTF follows:

     As root, execute these commands on the system console:

        # /etc/conf/bin/idtune -f RSTCHOWN 1
        # /etc/conf/bin/idbuild -B
        # init 6

     This procedure sets a kernel parameter that prevents the problem from
     occuring, relinks the kernel, and reboots the system.

You can download the PTF as follows:

Anonymous ftp   (World Wide Web URL)
- -------------

        ftp://ftp.sco.COM/UW21/ptf3063.Z     (patch image, compressed)
        ftp://ftp.sco.COM/UW21/ptf3063.txt   (cover letter/installation notes)

- ----------

PTF 3063 is also available in the UNIXWARE forum on Compuserve.

SCO Online Support (SOS) BBS
- ----------------------------

PTF 3063 can also be downloaded interactively via X, Y, or Z MODEM or Kermit,
using the SCO Online Support System (SOS). Follow the menus selections under
"Toolchest" from the main SOS menu.

The phone numbers available for interactive transfer from SOS are:

1-408-426-9495                  (USA)
+44 (0)1923 210 888             (United Kingdom)

- ---------

- ---

MD5 (ptf3063.Z) = 1093420123c9bff603bd3c32a3867dcd
MD5 (ptf3063.txt) = 0ffa24e5e0d9a8caf8f4076149d782c3

sum -r (on UnixWare)
- ------

48571   391 ptf3063.Z
20546     3 ptf3063.txt

This bulletin is available for anonymous ftp download from
ftp://ftp.sco.COM/SSE/security_bulletins/SB.96:02a, and will be updated
as new information becomes available.

If you have further questions, contact your support provider.  If you
need to contact SCO, please send electronic mail to support@sco.COM, or
contact SCO as follows.

        USA/Canada: 6am-5pm Pacific Daylight Time (PDT)
        1-800-347-4381  (voice)
        1-408-427-5443  (fax)

        Pacific Rim, Asia, and Latin American customers: 6am-5pm Pacific
        ------------------------------------------------ Daylight Time
        1-408-425-4726  (voice)
        1-408-427-5443  (fax)

        Europe, Middle East, Africa: 9am-5:30pm Greenwich Mean Time (GMT)
        +44 (0)1923 816344 (voice)
        +44 (0)1923 817781 (fax)

[End SCO Bulletin]


CIAC wishes to acknowledge the contributions of Santa Cruz Operation and CERT
for 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 emergency backup response team for the National
Institutes 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 (
   Modem access:        +1 (510) 423-4753 (28.8K baud)
                        +1 (510) 423-3331 (28.8K baud)

CIAC has several self-subscribing mailing lists for electronic
1. CIAC-BULLETIN for Advisories, highest priority - time critical
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2. CIAC-NOTES for Notes, a collection of computer security articles;
3. SPI-ANNOUNCE for official news about Security Profile Inspector
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4. SPI-NOTES, for discussion of problems and solutions regarding the
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E-mail to       ciac-listproc@llnl.gov:
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You will receive an acknowledgment containing address, initial PIN,
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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,
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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
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LAST 10 CIAC BULLETINS ISSUED (Previous bulletins available from CIAC)

G-34: HP-UX Vulnerabilities (netttune, SAM remote admin)
G-35: SUN Microsystems Solaris vold Vulnerability
G-36: HP-UX Vulnerabilities in elm and rdist Programs
G-37: Vulnerability in Adobe FrameMaker (fm_fls)
G-38: Linux Vulnerabilities in mount and umount Programs
G-39: Vulnerability in expreserve
G-40: SGI admin and user Program Vulnerabilities
G-41: Vulnerability in BASH Program
G-42: Vulnerability in WorkMan Program
G-43: Vulnerabilities in Sendmail

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