ZDI-11-274: EMC Autostart ftAgent Opcode 0x140 Parsing Remote Code- Execution Vulnerability

From: ZDI Disclosures <zdi-disclosures@tippingpoint.com>
To: 'full-disclosure@lists.grok.org.uk' <full-disclosure@lists.grok.org.uk>,'bugtraq@securityfocus.com' <bugtraq@securityfocus.com>
Subject: ZDI-11-274: EMC Autostart ftAgent Opcode 0x140 Parsing Remote Code- Execution Vulnerability

ZDI-11-274: EMC Autostart ftAgent Opcode 0x140 Parsing Remote Code Execution Vulnerability


August 23, 2011

-- CVE ID:

-- CVSS:
10, (AV:N/AC:L/Au:N/C:C/I:C/A:C)

-- Affected Vendors:

-- Affected Products:
EMC AutoStart

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 11599. 
For further product information on the TippingPoint IPS, visit:


-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of EMC AutoStart. Authentication is not
required to exploit this vulnerability.

The specific flaw exists in the Agent Service (ftAgent.exe). The Agent
Service listens on TCP port 8045 for communications between AutoStart
nodes. When handling messages with opcode 0x140 the process performs
arithmetic on an unvalidated user-supplied value used to determine the
size of a new heap buffer, allowing a potential integer wrap to cause a
heap buffer overflow. Remote, unauthenticated attackers can exploit this
vulnerability by sending malformed message packets to the target, which
can ultimately lead to arbitrary code execution under the context of the
SYSTEM user.

-- Vendor Response:
EMC has issued an update to correct this vulnerability. More
details can be found at:

-- Disclosure Timeline:
2011-07-20 - Vulnerability reported to vendor
2011-08-23 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Sebastian Apelt (www.siberas.de)

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