Published:
10 June 1998
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-98.095 -- Sun Security Bulletin #00171 ftpd 11 June 1998 =========================================================================== Sun Microsystems, Inc. has released the following advisory concerning a vulnerability the in.ftpd program. This vulnerability can be exploited to launch a denial of service attack against the ftp server. 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. NOTE: This is only the original release of the security bulletin. It will not be updated when the original bulletin is. If downloading at a later date, it is recommended that the bulletin is retrieved from the original authors to ensure that the information is still current. 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 7031 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. - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- ________________________________________________________________________________ Sun Microsystems, Inc. Security Bulletin Bulletin Number: #00171 Date: June 10, 1998 Cross-Ref: Title: ftpd ________________________________________________________________________________ The information contained in this Security Bulletin is provided "AS IS." Sun makes no warranties of any kind whatsoever with respect to the information contained in this Security Bulletin. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY WARRANTY OF NON-INFRINGEMENT OR IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE HEREBY DISCLAIMED AND EXCLUDED TO THE EXTENT ALLOWED BY APPLICABLE LAW. IN NO EVENT WILL SUN MICROSYSTEMS, INC. BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, SPECIAL, INDIRECT, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES HOWEVER CAUSED AND REGARDLESS OF ANY THEORY OF LIABILITY ARISING OUT OF THE USE OF OR INABILITY TO USE THE INFORMATION CONTAINED IN THIS SECURITY BULLETIN, EVEN IF SUN MICROSYSTEMS, INC. HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. If any of the above provisions are held to be in violation of applicable law, void, or unenforceable in any jurisdiction, then such provisions are waived to the extent necessary for this disclaimer to be otherwise enforceable in such jurisdiction. ________________________________________________________________________________ 1. Bulletins Topics Sun announces the release of patches for Solaris(tm) 2.6, 2.5.1, 2.5 and 2.3 (SunOS(tm) 5.6, 5.5.1, 5.5 and 5.3), which relate to a vulnerability in ftpd. Sun estimates that the release of patches for Solaris 2.4 (SunOS 5.4) that relate to the same vulnerability will be available within 6 weeks of the date of this bulletin. Sun strongly recommends that you install the patches listed in section 4 immediately on systems running SunOS 5.6, 5.6_x86, 5.5.1, 5.5, and 5.3 which use in.ftpd. 2. Who is Affected Vulnerable: SunOS 5.6, 5.6_x86, 5.5.1, 5.5.1_x86, 5.5, 5.5_x86, 5.4, 5.4_x86 and 5.3. Not vulnerable: All other supported versions of SunOS. 3. Understanding the Vulnerability The in.ftpd daemon is the Internet File Transfer Protocol (FTP) server process. The server is invoked by the Internet daemon inetd each time a connection to the FTP service is made. A vulnerability has been discovered which could be exploited to launch an denial of service attack against the ftp server. 4. List of Patches The following patches are available in relation to the above problem. SunOS Patch ID _____ _________ SunOS 5.6 106301-01 SunOS 5.6_x86 106302-01 SunOS 5.5.1 103603-08 SunOS 5.5.1_x86 103604-08 SunOS 5.5 103577-08 SunOS 5.5_x86 103578-08 SunOS 5.4 101945-59 (to be released in 6 weeks) SunOS 5.4_x86 101946-52 (to be released in 6 weeks) SunOS 5.3 104938-02 _______________________________________________________________________________ APPENDICES A. Patches listed in this bulletin are available to all Sun customers via World Wide Web at: <URL:http://sunsolve.sun.com/sunsolve/pubpatches/patches.html> B. Checksums for the patches listed in this bulletin are available via World Wide Web at: <URL:http://sunsolve.sun.com/sunsolve/pubpatches/patches.html> C. Sun security bulletins are available via World Wide Web at: <URL:http://sunsolve.sun.com/pub-cgi/secbul.pl> D. Sun Security Coordination Team's PGP key is available via World Wide Web at: <URL:http://sunsolve.sun.com/sunsolve/secbulletins/SunSCkey.txt> E. 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 F. 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 the Security Coordination Team report [topic] The email is treated as a security report and is forwarded to the Security Coordination 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. ________________________________________________________________________________ Copyright 1998 Sun Microsystems, Inc. All rights reserved. Sun, Sun Microsystems, Solaris and SunOS are trademarks or registered trademarks of Sun Microsystems, Inc. in the United States and other countries. This Security Bulletin may be reproduced and distributed, provided that this Security Bulletin is not modified in any way and is attributed to Sun Microsystems, Inc. and provided that such reproduction and distribution is performed for non-commercial purposes. - -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBNX63gbdzzzOFBFjJAQETnAQAprMPrKXOYB6IhSWtkyCJWZ1rdKPEL9bd brSobIVcVMsgRucCSjN/V8QQW8N0bZzsZkSPBrlH9WQWH+KSQPqUWap5OYoXYsqZ jjmJdYXnVjzLUFA/FSwjsZo5mHpqGXJLQXUXbf18EqkNAG3RaLe1rjL7++F+Xiij XHZTfqiqaYk= =7Mv9 - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key iQCVAwUBNYEdGyh9+71yA2DNAQEMxQP+KtMJixSpmfwyKnKE9KlQvMly3rQZtcsG kwqxmQ4ZgnKn/nXe8tl6cJalNKVdP3h2C60xxu/SlT19oyHIlj5C0OUR31yhiq+h 6nrx4cOqaPBmGe67i24cxAUmhToig2UoCZIKySWeBK7R35iDyYcfd6ugTVTuWHCt 0vwOl0NsG24= =7J3X -----END PGP SIGNATURE-----