Snort rule update for Sept. 14, 2021 — Microsoft Patch Tuesday

The latest SNORT® rule release from Cisco Talos has arrived. This new round of rules provides coverage for many of the vulnerabilities covered in Microsoft Patch Tuesday.

For more details on the vulnerabilities Microsoft disclosed this month, head to the Talos blog.

Here's a breakdown of this afternoon's rule release:

Shared object rules	Modified shared object rules	New rules	Modified rules
2	0	17	4

There were no changes made to the snort.conf in this release.

Talos's rule release:

Microsoft Vulnerability CVE-2021-36963: A coding deficiency exists in Microsoft Windows Common Log File System driver that may lead to an escalation of privilege.

Previously released rules will detect attacks targeting these vulnerabilities and have been updated with the appropriate reference information. They are also included in this release and are identified with GID 1, SIDs 40689 through 40690.

Microsoft Vulnerability CVE-2021-36975: A coding deficiency exists in Microsoft Win32k that may lead to an escalation of privilege.

Rules to detect attacks targeting these vulnerabilities are included in this release and are identified with GID 1, SIDs 58136 through 58137.

Microsoft Vulnerability CVE-2021-38633: A coding deficiency exists in Microsoft Windows Common Log File System driver that may lead to an escalation of privilege.

Rules to detect attacks targeting these vulnerabilities are included in this release and are identified with GID 1, SIDs 58140 through 58141.

Microsoft Vulnerability CVE-2021-40444: A coding deficiency exists in Microsoft MSHTML Engine that may lead to remote code execution.

Previosly released rules will detect attacks targeting these vulnerabilities and have been updated with the appropriate reference information. They are also included in this release and are identified with GID 1, SIDs 58120 through 58129 and 58132 through 58135.

Talos also has added and modified multiple rules in the file-image, file-other, malware-other, os-windows and server-webapp rule sets to provide coverage for emerging threats from these technologies.

You can subscribe to Talos' newest rule detection functionality for as low as $29 a year with a personal account. Be sure and see our business pricing as well here. Make sure and stay up to date to catch the most emerging threats.