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[SA38066] Apple Mac OS X "strtod()" Floating Point Parsing Memory Corruption

From: Secunia Security Advisories (sec-advsecunia.com)
Date: Wed Jan 13 2010 - 20:11:10 CST


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TITLE:
Apple Mac OS X "strtod()" Floating Point Parsing Memory Corruption

SECUNIA ADVISORY ID:
SA38066

VERIFY ADVISORY:
http://secunia.com/advisories/38066/

DESCRIPTION:
A vulnerability has been discovered in Mac OS X, which can be
exploited by malicious people to potentially compromise a vulnerable
system.

The vulnerability is caused due to an error in libc when processing
floating point numbers passed to the "strtod()" function. This can be
exploited to corrupt memory when an application passes a specially
crafted floating point number to the "strtod()" function or another
function calling it (e.g. the "atof()" function).

The vulnerability is confirmed in Mac OS X 10.5.8 and reported in Mac
OS X 10.6.

NOTE: Currently, there is no application known that can be used as
attack vector.

SOLUTION:
There is no effective solution.

PROVIDED AND/OR DISCOVERED BY:
Maksymilian Arciemowicz and sp3x

ORIGINAL ADVISORY:
http://securityreason.com/achievement_securityalert/81

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