This indicates an attempt to exploit a buffer overflow vulnerability in the Adobe PDF reader JavaScript engine.
By passing overly long parameters to the method "Collab.collectEmailInfo()", an attacker can execute arbitrary code on a vulnerable computer. To exploit this the attacker must trick the victim into opening a maliciously crafted PDF document.
Impact
System Compromise: remote attackers can gain control of vulnerable systems.
Affected Products
Versions older than Adobe Reader and Acrobat before 8.1.2
