Rule Category

OS-WINDOWS -- Snort has detected traffic targeting vulnerabilities in a Windows-based operating system. This does not include browser traffic or other software on the OS, but attacks against the OS itself.

Alert Message

OS-WINDOWS Microsoft Windows empty RDP cookie negotiation attempt

Rule Explanation

A buffer overflow in Smart Card authentication code in gpkcsp.dll in Microsoft Windows XP through SP3 and Server 2003 through SP2 allows a remote attacker to execute arbitrary code on the target computer, provided that the computer is joined in a Windows domain and has Remote Desktop Protocol connectivity (or Terminal Services) enabled. Impact: CVSS base score 8.1 CVSS impact score 5.9 CVSS exploitability score 2.2 confidentialityImpact HIGH integrityImpact HIGH availabilityImpact HIGH Details: Ease of Attack:

What To Look For

This rule alerts on an RDP session negotiation with an empty cookie value

Known Usage

No public information

False Positives

No known false positives

Contributors

Talos research team. This document was generated from data supplied by the national vulnerability database, a product of the national institute of standards and technology. For more information see [nvd].

Rule Groups

No rule groups

CVE

Additional Links

Rule Vulnerability

N/A

Not Applicable

CVE Additional Information

This product uses data from the NVD API but is not endorsed or certified by the NVD.
CVE-2017-0176
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CVE-2017-9073
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MITRE ATT&CK Framework

Tactic: Discovery

Technique: Domain Trust Discovery

For reference, see the MITRE ATT&CK vulnerability types here: https://attack.mitre.org