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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2007.0585 -- [Solaris] Solaris 10 Systems May Panic or Hang When Running Certain DTrace D Programs 3 August 2007 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Publisher: Sun Microsystems Operating System: Solaris 10 Impact: Denial of Service Access: Existing Account Original Bulletin: http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-103021-1 Comment: Note that this is not a security issue unless untrusted users have been granted the PRIV_DTRACE_USER privilege, which is not granted by default. - --------------------------BEGIN INCLUDED TEXT-------------------- Sun(sm) Alert Notification * Sun Alert ID: 103021 * Synopsis: Solaris 10 Systems May Panic or Hang When Running Certain DTrace D Programs * Category: Security * Product: Solaris 10 Operating System * BugIDs: 6479756 * Avoidance: Patch, Workaround * State: Resolved * Date Released: 30-Jul-2007 * Date Closed: 30-Jul-2007 * Date Modified: 1. Impact A security vulnerability in the DTrace (see dtrace(1M)) dynamic tracing framework may allow a local user who has privileges to run certain DTrace programs to cause the system to panic or become unresponsive. This is a type of Denial of Service (DoS). The minimum privilege required is the PRIV_DTRACE_USER privilege (see privileges(5)). 2. Contributing Factors This issue can occur in the following releases: SPARC platform * Solaris 10 without patch 125100-10 x86 Platform * Solaris 10 without patch 125101-10 Note: This issue does not affect Solaris 8 or Solaris 9. 3. Symptoms If this issue is encountered on a SPARC system, especially those based on the UltraSPARC T1 processor, the system will typically panic with an error message of "send mondo timeout". It is unlikely for this issue to occur on x86 based systems but if it does occur the system will appear to be either hung or extremely slow. 4. Relief/Workaround If users have been granted any of the DTrace privileges then those privileges can be removed until the patches have been applied. The additional privileges may have been configured via policy.conf(4) or user_attr(4). If the privileges have been configured directly in the local "/etc/user_attr" file, then they can be removed using the usermod(1M) utility as shown: # usermod -K limitpriv=all,!dtrace_user,!dtrace_proc,!dtrace_kernel user Note: Privileges may also be assigned via an execution profile (see exec_attr(4)) or even to running processes using ppriv(1). 5. Resolution This issue is addressed in the following releases: SPARC platform * Solaris 10 with patch 125100-10 or later x86 platform * Solaris 10 with patch 125101-10 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. BY ACCESSING THIS DOCUMENT YOU ACKNOWLEDGE THAT SUN SHALL IN NO EVENT BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES THAT ARISE OUT OF YOUR USE OR FAILURE TO USE THE INFORMATION CONTAINED HEREIN. This Sun Alert notification contains Sun proprietary and confidential information. It is being provided to you pursuant to the provisions of your agreement to purchase services from Sun, or, if you do not have such an agreement, the Sun.com Terms of Use. This Sun Alert notification may only be used for the purposes contemplated by these agreements. Copyright 2000-2006 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, CA 95054 U.S.A. All rights reserved. - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 If you believe that your computer system has been compromised or attacked in any way, we encourage you to let us know by completing the secure National IT Incident Reporting Form at: http://www.auscert.org.au/render.html?it=3192 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 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 member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQCVAwUBRrKJ/Sh9+71yA2DNAQKQzAP/WG1bJrC4SBQmLBxNO7moe2sJdT0oDO0u er9Qyl6DB+FfsIVN076wuCZ08wFO1l4cuGIVatrdU8PtAQqwLeO5Xl3GgoYfrnOG Aoc5ckumIcWK4NyzbS1kWb35H806/F0q/aLKnHaVOwfmO0n7Sj/duMNNEeyOGM/L Yhq3UaE0OKQ= =/daz -----END PGP SIGNATURE-----