Published:
28 October 1997
Protect yourself against future threats.
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AUSCERT External Security Bulletin Redistribution
ESB-97.135 -- Sun Security Bulletin #00156
ftpd/rlogind
29 October 1997
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Sun Microsystems, Inc. has released the following advisory concerning a
vulnerability in an interaction between the ftp and rlogin daemons. This
vulnerability may allow an unprivileged user to connect from an ftp server's
data port to a rlogin server on a host that trusts the host that the ftp
server resides on and execute arbitary commands on the attacked host.
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: #00156
Date: October 28, 1997
Cross-Ref:
Title: ftpd/rlogind
________________________________________________________________________________
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 vulnerabilities in ftpd/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, and 4.1.3_U1
The vulnerability is fixed in Solaris 2.6.
3. Understanding the Vulnerability
The daemon in.ftpd is the Internet File Transfer Protocol (FTP) server
process and the daemon in.rlogind is the rlogin server process. This
vulnerability, if exploited, allows an unprivileged user to connect from
an ftp server's data port to a rlogin server on a host that trusts the host
that the ftp server resides on. If exploited, attackers may execute
arbitrary commands on the attacked host.
4. List of Patches
The vulnerability in ftpd/rlogind is fixed by the following patches:
OS version Patch ID
__________ ________
SunOS 5.5.1 103603-05
104935-01
SunOS 5.5.1_x86 103604-05
104936-01
SunOS 5.5 103577-06
104933-01
SunOS 5.5_x86 103578-06
104934-01
SunOS 5.4 101945-51
SunOS 5.4_x86 101946-45
SunOS 5.3 104938-01
SunOS 4.1.4 104477-03
SunOS 4.1.3_U1 104454-03
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
_______________ _________ __________ _______________________________
103603-05.tar.Z 35241 180 26091 359 F88341AFCA8E0BDA0CDA3D5D643A0A6B
104935-01.tar.Z 37614 91 8235 182 DC35D86C7E10AC808822C579B3D2768E
103604-05.tar.Z 32337 169 1518 338 7DE29C6ADBE421BE0205FB073037F20A
104936-01.tar.Z 56022 96 15068 192 E7121D9A75034D1265B7284129A55D89
103577-06.tar.Z 40184 179 1545 358 F5A34940EAD0745BC7E156DF789B49AC
104933-01.tar.Z 00691 91 46319 182 812B7A3A003F7A0A4E51F142FB7DF178
103578-06.tar.Z 04500 169 16233 338 EBAE43827BB84B7CD199B379D5FF362E
104934-01.tar.Z 61481 96 2099 192 AFF2D82DFB54620D8E86CE81873F4A83
101945-51.tar.Z 19354 10914 1335 21827 A654CCB9C09E8E9AE8E96F6977BF7AB5
101946-45.tar.Z 54871 5544 58856 11087 B9CFDA275F39F1F28031DF7B4F39C275
104938-01.tar.Z 00944 107 30171 213 692E6E7298068AF81398AE17220F8BB0
104477-03.tar.Z 44658 85 10415 170 E36EF932BE48BE3A88552B29C00EC748
104454-03.tar.Z 37033 85 18242 170 D58ABFDEC3A15795353854F19DAD158B
_______________________________________________________________________________
Sun acknowledges with thanks AUSCERT for their assistance in the preparation
of this bulletin.
Sun and AUSCERT are members of FIRST, the Forum of Incident Response Teams.
For more information about FIRST, visit the FIRST web site at
"http://www.first.org/".
_______________________________________________________________________________
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
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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
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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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