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Vigil@nce - Adobe Reader: unreachable memory reading via CoolType.dll

May 2015 by Vigil@nce

This bulletin was written by Vigil@nce : http://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

An attacker can force a read at an invalid address in CoolType.dll
of Adobe Reader, in order to trigger a denial of service.

 Impacted products: Acrobat
 Severity: 1/4
 Creation date: 13/05/2015

DESCRIPTION OF THE VULNERABILITY

The Adobe Reader product uses the Type1/CFF CharString interpreter
in CoolType.dl to display fonts.

However, it tries to read an unreachable memory area, which
triggers a fatal error.

An attacker can therefore force a read at an invalid address in
CoolType.dll of Adobe Reader, in order to trigger a denial of
service.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/Adobe-Reader-unreachable-memory-reading-via-CoolType-dll-16898


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