Snort Subscriber Rules Update 2021-08-10

[Research <research () sourcefire com>]

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Talos Snort Subscriber Rules Update

Synopsis:
Talos is aware of vulnerabilities affecting products from Microsoft
Corporation.

Details:
Microsoft Vulnerability CVE-2021-26432:
A coding deficiency exists in Microsoft Windows Services for NFS ONCRPC
XDR Driver that may lead to remote code execution.

A rule to detect attacks targeting this vulnerability is included in
this release and is identified with GID 1, SID 58003.

Microsoft Vulnerability CVE-2021-34480:
A coding deficiency exists in Microsoft Scripting Engine that may lead
to remote code execution.

Rules to detect attacks targeting these vulnerabilities are included in
this release and are identified with GID 1, SIDs 57998 through 57999.

Microsoft Vulnerability CVE-2021-34535:
A coding deficiency exists in Remote Desktop Client that may lead to
remote code execution.

A rule to detect attacks targeting this vulnerability is included in
this release and is identified with GID 1, SID 57997.


Talos has added and modified multiple rules in the browser-chrome,
browser-ie, malware-cnc, malware-other, os-linux and server-other rule
sets to provide coverage for emerging threats from these technologies.


For a complete list of new and modified rules please see:

https://www.snort.org/advisories
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