This indicates an attack attempt to exploit a Memory Leakage vulnerability in Adobe Flash Player.
The vulnerability is due to an error when the vulnerable software handles a maliciously crafted JPEG file. An attacker can exploit this by tricking an unsuspecting user into visiting a malicious webpage, and bypass ASLR protection mechanism on the targeted user's system to perform other attacks.
Flash Player Active X plugin for Internet Explorer 220.127.116.11 and earlier versions
Flash Player Windows NPAPI plugin for Firefox 18.104.22.168 and earlier versions
Flash Player 22.214.171.124 and earlier versions (network distribution)
Flash Player 126.96.36.1994 and earlier for Linux
Flash Player 188.8.131.52 and earlier for Chrome (Windows, Macintosh and Linux)
Flash Player 184.108.40.206 and earlier in Internet Explorer 10 for Windows 8.0
Flash Player 220.127.116.11 and earlier in Internet Explorer 11 for Windows 8.1
AIR 18.104.22.168 and earlier versions
AIR 22.214.171.124 SDK & Compiler and earlier versions
AIR 126.96.36.199 SDK and earlier versions
AIR 188.8.131.52 and earlier versions for Android
Security Bypass: Remote attackers can bypass security checks of vulnerable systems.
Apply the most recent upgrade or patch from the vendor.