Vulnerability identifier: #VU48060
Vulnerability risk: High
CVSSv3.1: 7.5 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:H/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-119
Exploitation vector: Local
Exploit availability: Yes
Vulnerable software:
Windows
Operating systems & Components /
Operating system
Windows Server
Operating systems & Components /
Operating system
Vendor: Microsoft
Description
The vulnerability allows a local user to escalate privilege son the system.
The vulnerability exists due to a boundary error within the Windows Kernel Cryptography Driver cng.sys, which exposes a "\Device\CNG" device to user-mode programs and supports a variety of IOCTLs with non-trivial input structures. A local user can run a specially crafted program to trigger memory corruption and execute arbitrary code on the system with elevated privileges.
Note, this vulnerability is being actively exploited in the wild.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Windows: 10 - 10 Gold, 8, 8.1, 7 - 7 SP1
Windows Server: 2008 - 2019 2004
External links
http://bugs.chromium.org/p/project-zero/issues/detail?id=2104
http://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-17087
Can this vulnerability be exploited remotely?
No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.