MCI Telecommunications internetMCI Security Group Report Title: iMCI MIIGS Security Alert Report Name: SUN ftpd Vulnerability Report Number: iMCISE:IMCICIAC:061898:01:P1R2 Report Date: 06/18/98 Report Format: Formal Report Classification: MCI Informational Report Reference: http://www.security.mci.net Report Distribution: iMCI Security, MCI Internal Internet Gateway Security (MIIGS), MCI Emergency Alert LiSt (MEALS) (names on file) -------------------------------------------------------------------------- [ For Public Release ] __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN SUN ftpd Vulnerability June 17, 1998 15:00 GMT Number I-059 ______________________________________________________________________________ PROBLEM: A vulnerability has been identified in the in.ftpd daemon. PLATFORM: Solaris 2.6, 2.5.1, 2.5, 2.3 and SunOS 5.6, 5.5.1, 5.5, 5.3. DAMAGE: The vulnerability may be exploited to launch an denial of service attack against the ftp server. SOLUTION: Install the patches listed below. ______________________________________________________________________________ VULNERABILITY Sun strongly recommends that you install the patches listed in ASSESSMENT: section 4 immediately on systems running SunOS 5.6, 5.5.1, 5.5, and 5.3 which use in.ftpd. ______________________________________________________________________________ [ Start Sun Microsystems Advisory ] ______________________________________________________________________________ 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: B. Checksums for the patches listed in this bulletin are available via World Wide Web at: C. Sun security bulletins are available via World Wide Web at: D. Sun Security Coordination Team's PGP key is available via World Wide Web at: 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. 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[ End Sun Microsystems Advisory ] ______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Sun Microsystems 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. 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