===================================================================== CERT-Renater Note d'Information No. 2005/VULN202 _____________________________________________________________________ DATE : 18/03/2005 HARDWARE PLATFORM(S) : / OPERATING SYSTEM(S) : Solaris 7, Solaris 8, Solaris 9. ====================================================================== Sun(sm) Alert Notification * Sun Alert ID: 57710 * Synopsis: Security Vulnerability in the newgrp(1) Command May Allow Unauthorized Root Privileges * Category: Security * Product: Solaris * BugIDs: 4705393 * Avoidance: Workaround, Patch * State: Resolved * Date Released: 16-Mar-2005 * Date Closed: 16-Mar-2005 * Date Modified: 1. Impact A buffer overflow in newgrp(1) may allow a local unprivileged user the ability to gain root privileges. 2. Contributing Factors This issue can occur in the following releases: SPARC Platform * Solaris 7 without patch [2]118737-01 * Solaris 8 without patch [3]116993-01 * Solaris 9 without patch [4]117445-01 x86 Platform * Solaris 7 without patch [5]118738-01 * Solaris 8 without patch [6]116994-01 * Solaris 9 without patch [7]117446-01 Note: Solaris 10 is not affected by this issue. addressed 3. Symptoms There are no predictable symptoms that would indicate the described issue has been exploited. Solution Summary [8]Top 4. Relief/Workaround To work around the described issue, sites may wish to remove the "setuid" permissions from the newgrp(1) utility until patches can be applied to the system. This can be done by issuing the following command: # chmod u-s /usr/bin/newgrp Note: Removing the set-user-ID bit from the newgrp(1) utility will prevent unprivileged users from using the newgrp(1) command. 5. Resolution This issue is addressed in the following releases: SPARC Platform * Solaris 7 with patch [9]118737-01 or later * Solaris 8 with patch [10]116993-01 or later * Solaris 9 with patch [11]117445-01 or later x86 Platform * Solaris 7 with patch [12]118738-01 or later * Solaris 8 with patch [13]116994-01 or later * Solaris 9 with patch [14]117446-01 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 2000-2005 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, CA 95054 U.S.A. All rights reserved. References 1. http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-57710-1#top 2. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-118737-01-1 3. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-116993-01-1 4. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-117445-01-1 5. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-118738-01-1 6. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-116994-01-1 7. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-117446-01-1 8. http://sunsolve.sun.com/search/printfriendly.do?assetkey=1-26-57710-1#top 9. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-118737-01-1 10. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-116993-01-1 11. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-117445-01-1 12. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-118738-01-1 13. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-116994-01-1 14. http://sunsolve.sun.com/search/document.do?assetkey=urn:cds:docid:1-21-117446-01-1 ====================================================================== ========================================================= Les serveurs de référence du CERT-Renater http://www.urec.fr/securite http://www.cru.fr/securite http://www.renater.fr ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 151 bd de l'Hopital | fax : 01-53-94-20-41 + + 75013 Paris | email: certsvp@renater.fr + =========================================================