The vulnerability was discovered by the researcher тАШbilouтАЩ, who reported the bug through HPтАЩs Zero Day Initiative (ZDI).
Has been used in a watering hole attack against US Defense and Financial Services firms, where it was hosted on the compromised Forbes.com website.
Vulnerable component: Adobe Flash Player
CVSSv3 score: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C
CWE-ID: CWE-121 - Stack-based Buffer Overflow
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The weakness exists due to stack-based buffer overflow when processing .swf files. 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 of the vulnerability results in arbitrary code execution on the vulnerable system.
Note: the vulnerability was being actively exploited.
Known APT campaigns:
US Defense and Financial Services firms breach
The attack reffers to a Chinese actor group Codoso (according to iSIGHT Partners), Sunshop Group (according to FireEye).