-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 @stake, Inc. www.atstake.com Security Advisory Advisory Name: HP dced Remote Command Execution Release Date: 07/22/2004 Application: dced Platform: HPUX 11 HP Tru64 HP OpenVMS Severity: A remote attacker can execute arbitrary commands Authors: Jeremy Jethro [jjethro@si.rr.com] Vendor Status: Vendor has patches CVE Candidate: CAN-2004-0716 Reference: www.atstake.com/research/advisories/2004/a072204-1.txt Overview: A buffer overflow vulnerability was discovered in HP's implementation of the DCE endpoint mapper (epmap) which listens by default on TCP port 135. Successful exploitation of this vulnerability may allow an attacker to execute arbitrary commands on the targeted system with the privileges of the DCED process which is typically run as the root user. Details: There is a buffer overflow in HP's DCED implementation that can be triggered by specifying a small fragment length, and sending a large amount of stub data. A Nessus (NASL) script that can detect vulnerable DCED daemons will be released 30 days after the publication of this advisory. Timeline: Vendor notified on 4/23/2004 via email to security-alert@hp.com Vendor responded on 4/29/2004 that current patched version of HP-UX 11 with patches noted in bulletin HPSBUX0311-299 fixed this issue. However, vendor noted that this issue effected other dced implementations and suggested notifying US-CERT so all vendors may test their code. US-CERT notified on 5/3/2004 US-CERT responded on 5/7/2004 and issued tracking number VU#259796 HP releases Tru64 security bulletin on 6/21/2004 HP releases OpenVMS security bulletin on 7/14/2004 US-CERT confirms that it knows of no other vendors that were notified of issue VU#259796 that are vulnerable to same issue on 7/20/2004 Advisory released 7/22/2004 Vendor Response: OS: HP HP-UX 11 (Issue fixed prior to notification from @stake) Bulletin: HPSBUX0311-299: SSRT3660 DCE (Rev.01) Patch: B.11.00 - PHSS_29963 B.11.11 - PHSS_29964 B.11.23 - PHSS_29966 The patches are available on OS: HP Tru64 Bulletin: SSRT4741 rev.0 DCE for HP Tru64 UNIX Potential RPC Buffer Overrun Attack Patch: http://support.entegrity.com/private/patches/dce/ssrt4741.asp OS: HP OpenVMS Bulletin: SSRT4741 Rev.1 DCE for HP OpenVMS Potential RPC Buffer Overrun Attack HP is releasing the following patch kits to resolve this issue and are available from the ITRC at http://www2.itrc.hp.com/service/patch/mainPage.do Search for the patch kit name as shown. HP OpenVMS Alpha Version: Patch Kit name: HP OpenVMS Alpha V7.3-2 VMS732_RPC-V0300 HP OpenVMS Alpha V7.3-1 VMS731_RPC-V0400 HP OpenVMS Alpha V7.3 VMS73_RPC-V0400 @stake Recommendation: Disable dced if not necessary. If required install vendor patches. Common Vulnerabilities and Exposures (CVE) Information: The Common Vulnerabilities and Exposures (CVE) project has assigned the following names to these issues. These are candidates for inclusion in the CVE list (http://cve.mitre.org), which standardizes names for security problems. CAN-2004-0716 HP dced Remote Command Execution @stake Vulnerability Reporting Policy: http://www.atstake.com/research/policy/ @stake Advisory Archive: http://www.atstake.com/research/advisories/ PGP Key: http://www.atstake.com/research/pgp_key.asc Copyright 2004 @stake, Inc. All rights reserved. -----BEGIN PGP SIGNATURE----- Version: PGP 8.0.3 - not licensed for commercial use: www.pgp.com iQA/AwUBQP/3DUe9kNIfAm4yEQLzEwCg60XUutO7NbMPIS3usaKynS806S4AoJtx ufrEUVgpDaNJsuvh/vK6YBAl =Vnwi -----END PGP SIGNATURE-----