A functional exploit with shellcode appeared on PasteBin on 8.06.12 - four days before the Microsoft patch release.
The vulnerability was reported by adept with nickname Dark Son and researcher Yichong Lin.
Vulnerable component: Microsoft Internet Explorer
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-416 - Use After Free
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The weakness exists due to a use-after-free error related to same id property when attempting to access objects that have been deleted. A remote attacker can create a specially crafted Web site, trick the victim into viewing 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.
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