(Pwn2Own) Microsoft Windows CLFS Driver Uninitialized Memory Privilege Escalation Vulnerability
Vulnerability Details
This vulnerability allows local attackers to escalate privileges on vulnerable 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 Common Log File System (CLFS) driver. A crafted call to this driver can trigger access to memory prior to initialization. An attacker can leverage this vulnerability to escalate privilege to the level of SYSTEM.
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-2017-8590
Disclosure Timeline
- 2017-03-16 - Vulnerability reported to vendor
- 2017-07-11 - Coordinated public release of advisory
Credit
pgboy and zhong_sf of Qihoo 360Vulcan Team
