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Zero Day Initiative Advisory 11-274

Zero Day Initiative Advisory 11-274
Posted Aug 24, 2011
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 11-274 - 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.

tags | advisory, remote, overflow, arbitrary, tcp, code execution
advisories | CVE-2011-2735
MD5 | ad0797e98ba3f28698804587718e67dd

Zero Day Initiative Advisory 11-274

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

http://www.zerodayinitiative.com/advisories/ZDI-11-274

August 23, 2011

-- CVE ID:
CVE-2011-2735

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

-- Affected Vendors:
EMC

-- 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:

http://www.tippingpoint.com

-- 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:
http://www.securityfocus.com/archive/1/519371

-- 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)

-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, The Zero Day Initiative (ZDI) represents
a best-of-breed model for rewarding security researchers for responsibly
disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:

http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint provides its customers with zero day protection through
its intrusion prevention technology. Explicit details regarding the
specifics of the vulnerability are not exposed to any parties until
an official vendor patch is publicly available. Furthermore, with the
altruistic aim of helping to secure a broader user base, TippingPoint
provides this vulnerability information confidentially to security
vendors (including competitors) who have a vulnerability protection or
mitigation product.

Our vulnerability disclosure policy is available online at:
http://www.zerodayinitiative.com/advisories/disclosure_policy/

Follow the ZDI on Twitter:
http://twitter.com/thezdi

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