__________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Sun Security Vulnerability in Ping(1M) [Sun Alert ID: 57675] December 1, 2004 17:00 GMT Number P-045 ______________________________________________________________________________ PROBLEM: There is a potential buffer overflow in ping(1M). PLATFORM: SPARC Solaris 7 without patch 118313-01 Solaris 8 without patch 116986-02 Solaris 9 without patch 116774-03 x86 Solaris 7 without patch 118314-01 Solaris 8 without patch 116987-02 Solaris 9 without patch 116775-03 DAMAGE: Elevated privileges. SOLUTION: Upgrade to the appropriate version. ______________________________________________________________________________ VULNERABILITY The risk is MEDIUM. A local unprivileged user could gain ASSESSMENT: elevated privileges, root. ______________________________________________________________________________ LINKS: CIAC BULLETIN: http://www.ciac.org/ciac/bulletins/p-045.shtml ORIGINAL BULLETIN: Sun Alert ID: 57675 http://www.sunsolve.sun.com/search/document.do?assetkey=1 -26-57675-1&searchclause=%22category:security%22%20%22 availability,%20security%22 ______________________________________________________________________________ [***** Start Sun Alert ID: 57675 *****] Sun(sm) Alert Notification Sun Alert ID: 57675 Synopsis: Security Vulnerability in ping(1M) Category: Security Product: Solaris BugIDs: 4807715 Avoidance: Patch State: Resolved Date Released: 30-Nov-2004 Date Closed: 30-Nov-2004 Date Modified: 1. Impact There is a potential buffer overflow in ping(1M) which could result in a local unprivileged user gaining elevated privileges. 2. Contributing Factors This issue can occur in the following releases: SPARC Platform * Solaris 7 without patch 118313-01 * Solaris 8 without patch 116986-02 * Solaris 9 without patch 116774-03 x86 Platform * Solaris 7 without patch 118314-01 * Solaris 8 without patch 116987-02 * Solaris 9 without patch 116775-03 3. Symptoms There are no predictable symptoms that would show the described issue has been exploited. Solution Summary Top 4. Relief/Workaround To reduce the chances of the described issue from occurring, apply one of the following workarounds: 1. Remove the "set-user-ID" bit from the ping(1M) binary by issuing the following command: # chmod u-s /usr/sbin/ping Note: Removing the "set-user-ID" bit from the ping(1M) utility will prevent unprivileged users from using the ping(1M) command. 2. Enable non-executable program stacks by adding the following lines to the "/etc/system" file and reboot the system: set noexec_user_stack = 1 set noexec_user_stack_log = 1 The above tunable parameters are described in the Solaris Tunable Parameters Reference Manual at: http://docs.sun.com. Note: Although enabling non-executable user stacks makes the likelihood of a successful exploit much smaller, it does not provide 100 percent against exploitation of this vulnerability. This workaround is only effective on sun4u, sun4m, and sun4d architectures (enter "uname -m" to display a systems architecture). This workaround will not work on x86 platforms. 5. Resolution This issue is addressed in the following releases: SPARC Platform * Solaris 7 with patch 118313-01 or later * Solaris 8 with patch 116986-02 or later * Solaris 9 with patch 116774-03 or later x86 Platform * Solaris 7 with patch 118314-01 or later * Solaris 8 with patch 116987-02 or later * Solaris 9 with patch 116775-03 or later This Sun Alert notification is being provided to you on an "AS IS" basis. This Sun Alert notification may contain information provided by third parties. The issues described in this Sun Alert notification may or may not impact your system(s). Sun makes no representations, warranties, or guarantees as to the information contained herein. ANY AND ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT, ARE HEREBY DISCLAIMED. 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[***** End Sun Alert ID: 57675 *****] _______________________________________________________________________________ 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. CIAC can be contacted at: Voice: +1 925-422-8193 (7x24) FAX: +1 925-423-8002 STU-III: +1 925-423-2604 E-mail: ciac@ciac.org Previous CIAC notices, anti-virus software, and other information are available from the CIAC Computer Security Archive. World Wide Web: http://www.ciac.org/ Anonymous FTP: ftp.ciac.org PLEASE NOTE: Many users outside of the DOE, ESnet, and NIH computing communities receive CIAC bulletins. 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. 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