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Zero Day Initiative Advisory 11-351

Zero Day Initiative Advisory 11-351
Posted Dec 22, 2011
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 11-351 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Wellintek KingView. Authentication is not required to exploit this vulnerability. The specific flaw exists within the protocol parsing code inside nettransdll.dll. The parent service is called HistoryServer.exe and listens on port 777. When a packet with op-code 3 is received, the service allocates memory from the heap based on the 10th and 11th bytes of the packet (element count). Packet data is then copied into the allocated buffer based on the first two bytes of the packet (packet size). These values can be manipulated to create a heap overflow and and attacker can exploit this to remotely execute arbitrary code in the context of the service (Local System).

tags | advisory, remote, overflow, arbitrary, local, protocol
advisories | CVE-2011-4536
MD5 | c5596eaecac29e412797232bd07abfd7

Zero Day Initiative Advisory 11-351

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ZDI-11-351 : WellinTech KingView HistoryServer.exe Opcode 3 Parsing
Remote Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-11-351
December 22, 2011

- -- CVE ID:
CVE-2011-4536

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

- -- Affected Vendors:

WellinTech



- -- Affected Products:

WellinTech KingView



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

The specific flaw exists within the protocol parsing code inside
nettransdll.dll. The parent service is called HistoryServer.exe and
listens on port 777. When a packet with op-code 3 is received, the
service allocates memory from the heap based on the 10th and 11th bytes
of the packet (element count). Packet data is then copied into the
allocated buffer based on the first two bytes of the packet (packet
size). These values can be manipulated to create a heap overflow and and
attacker can exploit this to remotely execute arbitrary code in the
context of the service (Local System).

- -- Vendor Response:

WellinTech has issued an update to correct this vulnerability. More
details can be found at:

http://www.kingview.com/news/detail.aspx?contentid=587



- -- Disclosure Timeline:
2011-11-09 - Vulnerability reported to vendor
2011-12-22 - Coordinated public release of advisory

- -- Credit:
This vulnerability was discovered by:

* Luigi Auriemma



- -- 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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