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Zero Day Initiative Advisory 12-186

Zero Day Initiative Advisory 12-186
Posted Nov 16, 2012
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 12-186 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Microsoft Office. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the handling of RTF files. The code responsible for lexing control words from the input file does not properly validate that all objects are properly defined. By removing terminating values within an RTF file an attacker can cause the program to re-use a freed object. Combined with basic memory layout control an attacker can abuse this situation to achieve code execution under the context of the user running the application.

tags | advisory, remote, arbitrary, code execution
advisories | CVE-2012-0183
SHA-256 | 9335cf35112e6a5fa2f4b08c7f90e422e086a84a52fa98f66f3e2dbd9f174d4b

Zero Day Initiative Advisory 12-186

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ZDI-12-186 : Microsoft Office 2007 RTF Mismatch Remote Code Execution
Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-12-186

November 15, 2012

- -- CVE ID:
CVE-2012-0183

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

- -- Affected Vendors:
Microsoft

- -- Affected Products:
Microsoft Office

- -- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 12309 .
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 Microsoft Office. User interaction is required
to exploit this vulnerability in that the target must visit a malicious
page or open a malicious file.

The specific flaw exists within the handling of RTF files. The code
responsible for lexing control words from the input file does not properly
validate that all objects are properly defined. By removing terminating
values within an RTF file an attacker can cause the program to re-use a
freed object. Combined with basic memory layout control an attacker can
abuse this situation to achieve code execution under the context of the
user running the application.

- -- Vendor Response:
Microsoft has issued an update to correct this vulnerability. More details
can be found at:
http://technet.microsoft.com/en-us/security/bulletin/ms12-029

- -- Disclosure Timeline:
2011-11-29 - Vulnerability reported to vendor
2012-11-15 - Coordinated public release of advisory

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

- -- 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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