(Pwn2Own) Microsoft Windows DirectComposition RemoveBindingManagerReferenceFromTrackerIfNecessary Use-After-Free Privilege Escalation Vulnerability
Vulnerability Details
This vulnerability allows local attackers to escalate privileges on affected installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.
The specific flaw exists within the handling of the DirectComposition RemoveBindingManagerReferenceFromTrackerIfNecessary function in the kernel. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to escalate privileges and execute code in the context of the kernel.
Additional Details
Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2020-1382
Disclosure Timeline
- 2020-03-26 - Vulnerability reported to vendor
- 2020-07-16 - Coordinated public release of advisory
Credit
fluorescence
