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This month we got patches for 36 vulnerabilities total. From those, seven are rated critical and one is already being exploited according to Microsoft. 

The exploited vulnerability (CVE-2019-1458) may allow a local attacker to elevate privileges and run arbitrary code in kernel mode. This vulnerability was reported by Kaspersky Labs and, according to Zero Day Initiative  (ZDI) [1], Kaspersky also reported a UAF vulnerability in Google Chrome web browser [2] early November this year. When Chrome bug became public, there were speculations that it was being used in conjunction with a Windows Kernel bug to escape the sandbox. According to ZDI, while its not confirmed CVE-2019-1458 is connected to Chrome attacks, this is the type of bug that could be used to perform a sandbox escape. 

Amongst critical vulnerabilities, it worth mentioning CVE-2019-1471 a Windows Hyper-V Remote Code Execution Vulnerability. To exploit the vulnerability, an attacker could run a specially crafted application on a guest operating system that could cause the Hyper-V host operating system to execute arbitrary code.

See Renato's dashboard for a more detailed breakout: https://patchtuesdaydashboard.com

December 2019 Security Updates

December 2019 Security Updates

[1] https://www.zerodayinitiative.com/blog/2019/12/10/the-december-2019-security-update-review

[2] https://www.kaspersky.com/blog/google-chrome-zeroday-wizardopium/29126/

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Renato Marinho
Morphus Labs| LinkedIn|Twitter