ZDI-09-023: Apple OS X ATSServer Compact Font Format Parsing Memory Corruption Vulnerability

Type securityvulns
Reporter Securityvulns
Modified 2009-05-20T00:00:00


ZDI-09-023: Apple OS X Unspecified ATSServer Font Parsing Memory Corruption Vulnerability http://www.zerodayinitiative.com/advisories/ZDI-09-023 May 13, 2009

-- CVE ID: CVE-2009-0154

-- Affected Vendors: Apple

-- Affected Products: Apple OS X

-- Vulnerability Details: This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Apple OS X. 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 appears to exist in the ATSServer font server upon parsing of malicious Compact Font Format files. A boundary condition exists in the parsing of internal dictionaries that can lead to a memory corruption allowing the execution of arbitrary code.

-- Vendor Response: Apple has issued an update to correct this vulnerability. More details can be found at:


-- Disclosure Timeline: 2009-03-19 - Vulnerability reported to vendor 2009-05-13 - Coordinated public release of advisory

-- Credit: This vulnerability was discovered by: * Charlie Miller, Independent Security Evaluators

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