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Adobe Systems pushed out a security update for Flash Player to give additional security for a vulnerability.

The update is for Windows, Mac and Linx users, and addresses a vulnerability that can end up exploited by attackers to potentially execute code.

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Last month, Adobe issued a “proactive mitigation” that was successful in blocking an attack against CVE-2014-8439, a vulnerability in the handling of a dereferenced memory pointer, said Adobe spokesperson Heather Edell.

Because there was a specific attack targeting the vulnerability however, the company added further mitigations in this most recent release, she said.

Cyber Security

“We discovered the vulnerability while analyzing a Flash exploit from an exploit kit called Angler,” said Timo Hirvonen, senior researcher at F-Secure, in a blog post.

“We received the sample from Kafeine, a renowned exploit kit researcher. He asked us to identify the vulnerability which was successfully exploited with Flash Player but not with That would imply the vulnerability was something patched in APSB14-22. However, based on the information that we had received via Microsoft Active Protections Program the exploit didn’t match any of the vulnerabilities patched in APSB14-22 (CVE-2014-0558, CVE-2014-0564, or CVE-2014-0569),” Hirvonen said.

“We considered the possibility that maybe the latest patch prevented the exploit from working and the root cause of the vulnerability was still unfixed so we contacted the Adobe Product Security Incident Response Team,” he said. “They confirmed our theory and released an out-of-band update to provide additional hardening against a vulnerability in the handling of a dereferenced memory pointer that could lead to code execution, CVE-2014-8439.”

In October, Kafeine reported the Angler exploit kit was targeting the vulnerability, and the Astrum and Nuclear exploit kits soon followed suit, Hirvonen said. Kafeine also reported another Flash Player vulnerability, CVE-2014-8440, ended up targeted by Angler.

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