Apple Security Advisory 2015-09-30-03 - OS X El Capitan 10.11 is now available and addresses close to 100 vulnerabilities that may exist in prior releases.
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Debian Linux Security Advisory 3323-1 - Several vulnerabilities were discovered in the International Components for Unicode (ICU) library.
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Gentoo Linux Security Advisory 201507-4 - Multiple vulnerabilities have been found in International Components for Unicode, allowing attackers to execute arbitrary code or cause a Denial of Service condition. Versions less than 55.1 are affected.
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Ubuntu Security Notice 2605-1 - Pedro Ribeiro discovered that ICU incorrectly handled certain memory operations when processing data. If an application using ICU processed crafted data, an attacker could cause it to crash or potentially execute arbitrary code with the privileges of the user invoking the program.
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The ICU library suffers from heap and integer overflows. Confirmed vulnerable are versions 52 through 54.
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