ZDI-08-049: Microsoft Windows Graphics Rendering Engine PICT Heap Corruption http://www.zerodayinitiative.com/advisories/ZDI-08-049 August 12, 2008 -- CVE ID: CVE-2008-3021 -- Affected Vendors: Microsoft -- Affected Products: Microsoft File Format Vulnerability -- TippingPoint(TM) IPS Customer Protection: TippingPoint IPS customers have been protected against this vulnerability by Digital Vaccine protection filter ID 4665. For further product information on the TippingPoint IPS, visit: http://www.tippingpoint.com -- Vulnerability Details: A potential vulnerability exists in the Microsoft Office Suite. The issue is a result of insufficient bounds checking on the content of PICT files embedded into documents. Successful exploitation of this issue enables an attacker to remotely execute arbitrary code on a target system. User interaction would be required, as an attacker would have to convince the target user to open a malformed file. One of the filter DLLs for processing image files in Microsoft Office suffers from a potentially-exploitable memory corruption condition when processing .PICT images. An invalid value in the bits_per_pixel field (offset 0x257) causes heap corruption. Different values of this field result in distinctly different types of corruption. Internally, the issue was only reproducible when the malformed image was directly inserted into an Office document by the target user. -- Vendor Response: Microsoft has issued an update to correct this vulnerability. More details can be found at: http://www.microsoft.com/technet/security/bulletin/MS08-044.mspx -- Disclosure Timeline: 2006-09-14 - Vulnerability reported to vendor 2008-08-12 - Coordinated public release of advisory -- Credit: This vulnerability was discovered by: * Damian Put <pucik@xxxxxxxxxxx> -- 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/ CONFIDENTIALITY NOTICE: This e-mail message, including any attachments, is being sent by 3Com for the sole use of the intended recipient(s) and may contain confidential, proprietary and/or privileged information. Any unauthorized review, use, disclosure and/or distribution by any recipient is prohibited. If you are not the intended recipient, please delete and/or destroy all copies of this message regardless of form and any included attachments and notify 3Com immediately by contacting the sender via reply e-mail or forwarding to 3Com at postmaster@xxxxxxxxx
