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Zero Day Initiative Advisory 12-111

Zero Day Initiative Advisory 12-111
Posted Jun 29, 2012
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 12-111 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of SAP Netweaver ABAP. Authentication is not required to exploit this vulnerability. The specific flaw exists within the msg_server.exe listening on 3900 by default. When the msg_server parses a message with opcode 0x43 and sub-opcode 0x04 it uses a user supplied size field to copy a string into a static sized stack buffer. The resulting buffer overflow can lead to remote code execution under the context of the process.

tags | advisory, remote, overflow, arbitrary, code execution
MD5 | cd5e11a506e9e6507cceac5a1a8d413b

Zero Day Initiative Advisory 12-111

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Hash: SHA1

ZDI-12-111 : SAP Netweaver ABAP msg_server.exe Opcode 0x43 Remote Code
Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-12-111
June 28, 2012

- -- CVE ID:


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

- -- Affected Vendors:
SAP


- -- Affected Products:
SAP NetWeaver


- -- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 12407.
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 SAP Netweaver ABAP. Authentication is not
required to exploit this vulnerability.

The specific flaw exists within the msg_server.exe listening on 3900 by
default. When the msg_server parses a message with opcode 0x43 and
sub-opcode 0x04 it uses a user suplied size field to copy a string into a
static sized stack buffer. The resulting buffer overflow can lead to remote
code execution under the context of the process.

- -- Vendor Response:
SAP has issued an update to correct this vulnerability. More details can be
found at:
http://www.sdn.sap.com/irj/sdn/index?rid=/webcontent/uuid/c05604f6-4eb3-2d1
0-eea7-ceb666083a6a#section40


- -- Disclosure Timeline:
2011-10-28 - Vulnerability reported to vendor
2012-06-28 - Coordinated public release of advisory


- -- Credit:
This vulnerability was discovered by:
* e6af8de8b1d4b2b6d5ba2610cbf9cd38


- -- 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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