@stake advisory: HP dced Remote Command Execution Multiple OSes
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@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@xxxxxxxxx]
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@xxxxxx
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 <http://itrc.hp.com>
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.
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