Apple Quicktime PICT File PackBitsRgn Parsing Heap Corruption Vulnerability

2007.11.08
Credit: ZDI
Risk: High
Local: Yes
Remote: No
CWE: CWE-119


CVSS Base Score: 9.3/10
Impact Subscore: 10/10
Exploitability Subscore: 8.6/10
Exploit range: Remote
Attack complexity: Medium
Authentication: No required
Confidentiality impact: Complete
Integrity impact: Complete
Availability impact: Complete

ZDI-07-066: Apple Quicktime PICT File PackBitsRgn Parsing Heap Corruption Vulnerability http://www.zerodayinitiative.com/advisories/ZDI-07-066.html November 5, 2007 -- CVE ID: CVE-2007-4676 -- Affected Vendor: Apple -- Affected Products: QuickTime 7.2 -- Vulnerability Details: This vulnerability allows attackers to execute arbitrary code on vulnerable installations of Apple QuickTime. 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 exist in the parsing of the PackBitsRgn field (Opcode 0x0099). Due to improper handling of a malformed element in the structure, heap corruption occurs. If properly constructed this can lead to code execution running under the credentials of the user. -- Vendor Response: Apple has issued an update to correct this vulnerability. More details can be found at: http://docs.info.apple.com/article.html?artnum=306896 -- Disclosure Timeline: 2007.09.14 - Vulnerability reported to vendor 2007.11.05 - Coordinated public release of advisory -- Credit: This vulnerability was discovered by Ruben Santamarta of reversemode.com. -- 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. 3Com does not re-sell the vulnerability details or any exploit code. Instead, upon notifying the affected product vendor, 3Com 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, 3Com provides this vulnerability information confidentially to security vendors (including competitors) who have a vulnerability protection or mitigation product. 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 (at) 3com (dot) com. [email concealed]


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