This security advisory describes one medium risk vulnerability.
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the ws2ifsl.sys (Winsock). A local user can run a specially crafted application, trigger memory corruption and execute arbitrary code on the target system with elevated privileges.
Note, this vulnerability is being actively exploited in the wild.
Install updates from vendor's website.Vulnerable software versions
Windows: 7, 8.1, 10, 10 1607, 10 1703, 10 1709, 10 1803, 10 1809, 10 1903, RT 8.1
Windows Server: 1803, 1903, 2008, 2008 R2, 2012, 2012 R2, 2016, 2019CPE
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.