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. (such as?)

Alert Message

OS-WINDOWS Microsoft Windows Remote Desktop client DYNVC PDU handling integer overflow attempt

Rule Explanation

This event is generated when an attacker attempts to exploit an integer overflow vulnerability in Microsoft Windows. Impact: Attempted Administrator Privilege Gain Details: This rule checks for attempts to exploit an integer overflow vulnerability in Microsoft Windows' Remote Desktop client. Ease of Attack:

What To Look For

Known Usage

No public information

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

MITRE ATT&CK Framework

Tactic:

Technique:

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

CVE

Additional Links

CVE Additional Information

CVE-2020-0681
A remote code execution vulnerability exists in the Windows Remote Desktop Client when a user connects to a malicious server, aka 'Remote Desktop Client Remote Code Execution Vulnerability'. This CVE ID is unique from CVE-2020-0734.
Details
SeverityHIGH Base Score7.6
Impact Score10.0 Exploit Score4.9
Confidentiality ImpactCOMPLETE Integrity ImpactCOMPLETE
Availability ImpactCOMPLETE Access VectorNETWORK
AuthenticationNONE Ease of AccessHIGH