Cisco Talos Update for FireSIGHT Management Center

Date: 2021-06-08

This SRU number: 2021-06-07-001
Previous SRU number: 2021-06-05-001
Corresponding SEU number: 2328

Applies to:

SRU Change Summary:

Total new rules17
Total rule modifications4
Policy changeNo

Note: Rule updates are cumulative, so you do not need to install prior updates before installing this one.

To review a cumulative list of recent feature updates and resolved issues since the last Rule Updates you imported, use the link provided from this advisory on the Sourcefire Customer Support Site.

Synopsis:

Talos is aware of vulnerabilities affecting products from Microsoft Corporation.

Details:

Microsoft Vulnerability CVE-2021-31199:
A coding deficiency exists in Microsoft Enhanced Cryptographic Provider 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 57724 through 57725.

Microsoft Vulnerability CVE-2021-31201:
A coding deficiency exists in Microsoft Enhanced Cryptographic Provider 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 57730 through 57731.

Microsoft Vulnerability CVE-2021-31952:
A coding deficiency exists in Microsoft Windows Kernel-Mode 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 57722 through 57723.

Microsoft Vulnerability CVE-2021-31954:
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 57734 through 57735.

Microsoft Vulnerability CVE-2021-31955:
A coding deficiency exists in Microsoft Windows Kernel that may lead to information disclosure.

Rules to detect attacks targeting these vulnerabilities are included in this release and are identified with GID 1, SIDs 57726 through 57727.

Microsoft Vulnerability CVE-2021-31956:
A coding deficiency exists in Microsoft Windows NTFS 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 57732 through 57733.

Microsoft Vulnerability CVE-2021-31959:
A coding deficiency exists in Scripting Engine that may lead to remote code execution.

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 49388 through 49389.

Microsoft Vulnerability CVE-2021-33739:
A coding deficiency exists in Microsoft DWM Core Library 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 57736 through 57737.

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

Importing an update:

You can view instructions for importing rule updates and SEUs on the Sourcefire Customer Support Site and in the user documentation for the Sourcefire 3D System.

Detailed instructions can be found on the Sourcefire Customer Support Site in the downloads section for each product.

For Assistance:

For information on obtaining documentation, using the Cisco Bug Search Tool (BST), submitting a service request, and gathering additional information about Cisco ASA devices, see What's New in Cisco Product Documentation.

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About Talos:

The Talos Security Intelligence and Research Group (Talos) is made up of leading threat researchers supported by sophisticated systems to create threat intelligence for Cisco products that detects, analyzes and protects against both known and emerging threats. Talos maintains the official rule sets of Snort.org, ClamAV, SenderBase.org and SpamCop. The team's expertise spans software development, reverse engineering, vulnerability triage, malware investigation and intelligence gathering.