Zero-day vulnerability in Adobe Flash Player

тАЬUse-after-freeтАЭ error

The exploit code was revealed after Hacking Team data leak. The exploit was used against Japanese organizations.
The vulnerability was reported by Dhanesh Kizhakkinan of FireEye as well as Peter Pi of TrendMicro.

Known malware:

Exploit kits: Angler EK - 2015-07-11 Neutrino - 2015-07-13 Nuclear Pack - 2015-07-14 RIG - 2015-07-14 Magnitude - 2015-07-15 NullHole - 2015-07-22 Spartan - 2015-09-11

Vulnerability details

Advisory: SB2015071001 - Two remote code execution vulnerabilities in Adobe Flash Player

Vulnerable component: Adobe Flash Player

CVE-ID: CVE-2015-5122

CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer


The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The weakness exists due to use-after-free error in the ActionScript 3 opaqueBackground class. A remote attacker can create a specially crafted Web site, trick the victim into visiting it, trigger memory corruption and execute arbitrary code with privileges of the current user.

Successful exploitation results in arbitrary code execution on the vulnerable system.

Note: the vulnerability was being actively exploited.

Known APT campaigns:

CNACOM campaign

The campaign mainly targeted Taiwanese organizations and supposedly has Chinese origin.

Public Exploits: