Date: 29 October 1997
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AUSCERT External Security Bulletin Redistribution
ESB-97.137 -- Sun Security Bulletin #00158
rlogin
29 October 1997
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Sun Microsystems, Inc. has released the following advisory concerning a
vulnerability in the rlogin program. This vulnerability may allow users
to gain root access. This vulnerability has been publically discussed
and reported in CERT/CC Advisory CA-97.06 - Vulnerability in rlogin/term.
The following security bulletin is provided as a service to AUSCERT's
members. As AUSCERT did not write this document, AUSCERT has had no
control over its content. As such, the decision to use any or all of this
information is the responsibility of each user or organisation, and should
be done so in accordance with site policies and procedures.
Contact information for Sun is included in the Security Bulletin below.
If you have any questions or need further information, please contact them
directly.
Previous advisories and external security bulletins can be retrieved from:
http://www.auscert.org.au/information/advisories.html
If you believe that your system has been compromised, contact AUSCERT or your
representative in FIRST (Forum of Incident Response and Security Teams).
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 4477
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AUSCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for emergencies.
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Sun Microsystems, Inc. Security Bulletin
Bulletin Number: #00158
Date: October 28, 1997
Cross-Ref: CERT CA-97.06
Title: rlogin
________________________________________________________________________________
Permission is granted for the redistribution of this Bulletin, so long as
the Bulletin is not edited and is attributed to Sun Microsystems. Portions
may also be excerpted for re-use in other security advisories so long as
proper attribution is included.
Any other use of this information without the express written consent of
Sun Microsystems is prohibited. Sun Microsystems expressly disclaims all
liability for any misuse of this information by any third party.
________________________________________________________________________________
1. Bulletins Topics
Sun announces the release of patches for Solaris 2.5.1, 2.5, 2.4, 2.3,
(SunOS 5.5.1, 5.5, 5.4, 5.3), SunOS 4.1.4 and 4.1.3_U1 which relate to a
vulnerability in rlogin.
Sun strongly recommends that you install the patches listed in section 4
immediately on systems running SunOS 5.5.1, 5.5, 5.4, 5.3, 4.1.4, and
4.1.3_U1.
2. Who is Affected
Vulnerable: SunOS versions 5.5.1, 5.5.1_x86, 5.5, 5.5_x86,
5.4, 5.4_x86, 5.3, 4.1.4, 4.1.3_U1
The vulnerability is fixed in Solaris 2.6.
3. Understanding the Vulnerability
The rlogin program establishes a remote login session. Due to insufficient
bounds checking on arguments supplied to rlogin, it is possible to
overwrite the internal data space of the rlogin program. As rlogin is
setuid root, this vulnerability may be exploited to gain root access.
4. List of Patches
The vulnerability in rlogin is fixed by the following patches:
OS version Patch ID
__________ ________
SunOS 5.5.1 104650-02
SunOS 5.5.1_x86 104651-02
SunOS 5.5 104669-02
SunOS 5.5_x86 104670-02
SunOS 5.4 105254-01
SunOS 5.4_x86 105255-01
SunOS 5.3 105253-01
SunOS 4.1.4 105260-01
SunOS 4.1.3_U1 105259-01
5. Checksum Table
The checksum table below shows the BSD checksums (SunOS 4.1.x: /bin/sum;
SunOS 5.x: /usr/ucb/sum), SVR4 checksums (SunOS 4.1.x: /usr/5bin/sum;
SunOS 5.x: /usr/bin/sum), and the MD5 digital signatures for the
above-mentioned patches that are available from:
<URL:ftp://sunsolve1.sun.com/pub/patches/patches.html>
These checksums may not apply if you obtain patches from your answer
centers.
File Name BSD SVR4 MD5
_______________ _________ __________ ________________________________
104650-02.tar.Z 13535 97 28313 194 09633D56EE7957B583EA7B56868C041A
104651-02.tar.Z 63944 97 59194 194 62FC76D27F05D9088734AFB2FBA728B4
104669-02.tar.Z 50300 97 53035 194 603DBCACC7E43DB308F6191BC9FA5D69
104670-02.tar.Z 53991 97 53938 193 2AAB302E10CF860B4009E1CF873B1AE7
105254-01.tar.Z 16467 86 40933 172 6C1C5E4A63C07B69E79CFE31308703F0
105255-01.tar.Z 61095 86 58884 172 CE00AF98291E033BEE5E49C049AD6162
105253-01.tar.Z 12622 86 40936 172 382904D4F14E247D17F9E59F1424480D
105260-01.tar.Z 06896 11 12684 22 191C9F074855631D4CCCD136FA267DEE
105259-01.tar.Z 18628 11 19352 22 CCC5434C6F71AE02C5B456CE4C8BDBBE
_______________________________________________________________________________
APPENDICES
A. Patches listed in this bulletin are available to all Sun customers via
World Wide Web at:
<URL:ftp://sunsolve1.sun.com/pub/patches/patches.html>
Customers with Sun support contracts can also obtain patches from local
Sun answer centers and SunSITEs worldwide.
B. Sun security bulletins are available via World Wide Web at:
<URL:http://sunsolve1.sun.com/sunsolve/secbulletins>
C. Sun Security Coordination Team's PGP key is available via World Wide Web
at:
<URL:http://sunsolve1.sun.com/sunsolve/secbulletins/SunSCkey.txt>
D. To report or inquire about a security problem with Sun software, contact
one or more of the following:
- Your local Sun answer centers
- Your representative computer security response team, such as CERT
- Sun Security Coordination Team. Send email to:
security-alert@sun.com
E. To receive information or subscribe to our CWS (Customer Warning System)
mailing list, send email to:
security-alert@sun.com
with a subject line (not body) containing one of the following commands:
Command Information Returned/Action Taken
_______ _________________________________
help An explanation of how to get information
key Sun Security Coordination Team's PGP key
list A list of current security topics
query [topic] The email is treated as an inquiry and is forwarded to
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report [topic] The email is treated as a security report and is
forwarded to the Security Coordinaton Team. Please
encrypt sensitive mail using Sun Security Coordination
Team's PGP key
send topic A short status summary or bulletin. For example, to
retrieve a Security Bulletin #00138, supply the
following in the subject line (not body):
send #138
subscribe Sender is added to our mailing list. To subscribe,
supply the following in the subject line (not body):
subscribe cws your-email-address
Note that your-email-address should be substituted
by your email address.
unsubscribe Sender is removed from the CWS mailing list.
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