-----BEGIN PGP SIGNED MESSAGE----- [ For Public Release ] __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN SunOS eeprom Vulnerability June 25, 1997 16:00 GMT Number H-72 ______________________________________________________________________________ PROBLEM: A buffer overflow vulnerability has been identified in the eeprom program. PLATFORM: SunOS versions 5.3-5.5.1 (Solaris 2.3-2.5.1) for SPARC only. DAMAGE: This vulnerability may allow local users to gain root privileges. SOLUTION: Apply vendor patches specified in Section 4. ______________________________________________________________________________ VULNERABILITY It is highly recommended that patches be installed immediately. ASSESSMENT: ______________________________________________________________________________ [ Start Sun Microsystems Advisory ] - ------------------------------------------------------------------------------ Sun Microsystems, Inc. Security Bulletin Bulletin Number: #00143 Date: June 24 1997 Cross-Ref: Title: Vulnerability in eeprom - ------------------------------------------------------------------------------ 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, and 2.3 (SunOS 5.5.1, 5.5, 5.4, and 5.3), that relate to a vulnerability in the eeprom program. Sun strongly recommends that you install the patches listed in section 4 immediately on every affected system. 2. Who is Affected Vulnerable: SunOS versions 5.5.1, 5.5, 5.4, and 5.3 for SPARC only. Not vulnerable: All other supported versions of SunOS The vulnerability is fixed in the upcoming release of Solaris. 3. Understanding the Vulnerability The eeprom program changes or displays the values of parameters in EEPROM. The EEPROM (Electrically erasable programmable read-only memory) is a non-volatile PROM that holds information about the current system configuration, alternate boot paths, and other information. Due to insufficient bounds checking on arguments passed to the eeprom program, it is possible to overwrite the internal stack space of eeprom while it is executing. Since eeprom has setgid bin permissions, this vulnerability may allow non-privileged users to gain privileged access, including root privileges. 4. List of Patches The vulnerability in eeprom is fixed by the following patches: OS version Patch ID ---------- -------- SunOS 5.5.1 104795-01 SunOS 5.5 104796-01 SunOS 5.4 104798-01 SunOS 5.3 104797-01 Intel x86 systems do not have the eeprom program and are not affected by this vulnerability. 5. Checksum Table The checksum table below shows the BSD checksums (SunOS 5.x: /usr/ucb/sum), SVR4 checksums (SunOS 5.x: /usr/bin/sum), and the MD5 digital signatures for the above-mentioned patches that are available from: 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 - --------------- --------- --------- -------------------------------- 104795-01.tar.Z 03357 150 64333 300 3004B44BE2742A51A593DE8B76679768 104796-01.tar.Z 12042 150 18119 299 92DA0C5513E191A4C3719B3EFFB1B935 104798-01.tar.Z 40939 166 63088 332 DD89275C55397A97C4B06D1E5037723F 104797-01.tar.Z 59061 165 27937 330 BE97B2DD42A890F4E736A323E3CD8A4A - ------------------------------------------------------------------------------ APPENDICES A. Patches listed in this bulletin are available to all Sun customers via World Wide Web at: 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: http://sunsolve1.sun.com/sunsolve/secbulletins C. 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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. - ------------------------------------------------------------------------------ [ End Sun Microsystems Advisory ] ______________________________________________________________________________ CIAC wishes to acknowledge the contributions of Sun Microsystems, Inc. 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. 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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 via WWW at http://www.first.org/. 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. 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