-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 CERT Advisory CA-99-08 Buffer Overflow Vulnerability in Calendar Manager Service Daemon, rpc.cmsd Originally released: July 16, 1999 Source: CERT/CC Revised Date: July 22, 1999 Added link to IN-99-04 in the "Impact" section. Systems Affected * Systems running the Calendar Manager Service daemon, often named rpc.cmsd I. Description A buffer overflow vulnerability has been discovered in the Calendar Manager Service daemon, rpc.cmsd. The rpc.cmsd daemon is frequently distributed with the Common Desktop Environment (CDE) and Open Windows. II. Impact Remote and local users can execute arbitrary code with the privileges of the rpc.cmsd daemon, typically root. Under some configurations rpc.cmsd runs with an effective userid of daemon, while retaining root privileges. This vulnerability is being exploited in a significant number of incidents reported to the CERT/CC. An exploit script was posted to BUGTRAQ. For more information about attacks using various RPC services please see CERTŪ Incident Note IN-99-04 http://www.cert.org/incident_notes/IN-99-04.html III. Solution Install a patch from your vendor Appendix A contains information provided by vendors for this advisory. We will update the appendix as we receive more information. If you do not see your vendor's name, the CERT/CC did not hear from that vendor. Please contact your vendor directly. We will update this advisory as more information becomes available. Please check the CERT/CC Web site for the most current revision. Disable the rpc.cmsd daemon If you are unable to apply patches to correct this vulnerability, you may wish to disable the rpc.cmsd daemon. If you disable rpc.cmsd, it may affect your ability to manage calendars. Appendix A: Vendor Information Fujitsu Fujitsu's UXP/V operating system is not vulnerable. Hewlett-Packard Company HP is vulnerable, patches in process. IBM Corporation AIX is not vulnerable to the rpc.cmsd remote buffer overflow. IBM and AIX are registered trademarks of International Business Machines Corporation. Santa Cruz Operation, Inc. SCO is investigating this problem. The following SCO product contains CDE and is potentially vulnerable: + SCO UnixWare 7 The following SCO products do not contain CDE, and are therefore believed not to be vulnerable: + SCO UnixWare 2.1 + SCO OpenServer 5 + SCO Open Server 3.0 + SCO CMW+ SCO will provide further information and patches if necessary as soon as possible at http://www.sco.com/security. Silicon Graphics, Inc. IRIX does not have dtcm or rpc.cmsd and therefore is NOT vulnerable. UNICOS does not have dtcm or rpc.cmsd and therefore is NOT vulnerable. Sun Microsystems, Inc. The following patches are available: OpenWindows: SunOS version Patch ID _____________ _________ SunOS 5.5.1 104976-04 SunOS 5.5.1_x86 105124-03 SunOS 5.5 103251-09 SunOS 5.5_x86 103273-07 SunOS 5.3 101513-14 SunOS 4.1.4 100523-25 SunOS 4.1.3_U1 100523-25 CDE: CDE version Patch ID ___________ ________ 1.3 107022-03 1.3_x86 107023-03 1.2 105566-07 1.2_x86 105567-08 Patches for SunOS 5.4 and CDE 1.0.2 and 1.0.1 will be available within a week of the release of this advisory. Sun security patches are available at: http://sunsolve.sun.com/pub-cgi/show.pl?target=patches/patch-li cense&nav=pubpatches _________________________________________________________________ The CERT Coordination Center would like to thank Chok Poh of Sun Microsystems, David Brumley of Stanford University, and Elias Levy of Security Focus for their assistance in preparing this advisory. ______________________________________________________________________ This document is available from: http://www.cert.org/advisories/CA-99-08-cmsd.html. ______________________________________________________________________ CERT/CC Contact Information Email: cert@cert.org Phone: +1 412-268-7090 (24-hour hotline) Fax: +1 412-268-6989 Postal address: CERT Coordination Center Software Engineering Institute Carnegie Mellon University Pittsburgh PA 15213-3890 U.S.A. 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Revision History July 22, 1999 Added link to IN-99-04 in the "Impact" section July 20, 1999 Updated the advisory title July 16, 1999 Initial release -----BEGIN PGP SIGNATURE----- Version: PGP for Personal Privacy 5.0 Charset: noconv iQA/AwUBOBCTOVr9kb5qlZHQEQKeHgCfU8A67PMIT8RISghShaIszaqzIVcAoLVS kfwAEs/B6jl/yBF3FiFXgz9p =PLsH -----END PGP SIGNATURE-----