Snort Subscriber Rules Update 2021-03-09

[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-2021-24095:
A coding deficiency exists in DirectX 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 57259 through 57260.

Microsoft Vulnerability CVE-2021-26411:
A coding deficiency exists in Microsoft Internet Explorer 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 57268 through 57269.

Microsoft Vulnerability CVE-2021-26855:
A coding deficiency exists in Microsoft Exchange Server 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 57241 through 57244.

Microsoft Vulnerability CVE-2021-26857:
A coding deficiency exists in Microsoft Exchange Server 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 57233 through 57234.

Microsoft Vulnerability CVE-2021-26858:
A coding deficiency exists in Microsoft Exchange Server 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 57245 through 57246.

Microsoft Vulnerability CVE-2021-26863:
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 57263 through 57264.

Microsoft Vulnerability CVE-2021-26868:
A coding deficiency exists in Microsoft Graphics Component 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 57261 through 57262.

Microsoft Vulnerability CVE-2021-26877:
A coding deficiency exists in Microsoft Windows DNS server 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 57274.

Microsoft Vulnerability CVE-2021-26897:
A coding deficiency exists in Microsoft Windows DNS server that may
lead to remote code execution.

A previously released rule will detect attacks targeting these
vulnerabilities and has been updated with the appropriate reference
information. It is included in this release and is identified with GID
1, SID 54518.

Microsoft Vulnerability CVE-2021-27065:
A coding deficiency exists in Microsoft Exchange Server 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 57245 through 57246 and 57252 through 57253.

Microsoft Vulnerability CVE-2021-27076:
A coding deficiency exists in Microsoft SharePoint Server 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 57275 through 57276.

Talos also has added and modified multiple rules in the
browser-firefox, browser-ie, file-image, file-pdf,
indicator-compromise, netbios, os-other, os-windows, policy-other and
server-webapp 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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