CVE-2021-20023 - SONICWALL DIRECTORY TRAVERSAL EXPLOIT - HTTP (REQUEST)
This is Trend Micro detection for HTTP network protocol that manifests exploit activities and can be used for Point of Entry or Lateral Movement.
The host exhibiting this type of network behavior is likely compromised by malware, or being used by a malicious insider to gain unauthorized access to other hosts in the network.
CVE Exploit: CVE-2021-20023
Attack Phase: Point of Entry or Lateral Movement
Risk Type: FRAUD
Threat Type: Exploit
Confidence Level: High
Severity: High(Inbound)| Medium(Outbound)
DDI Default Rule Status: Disable
Event Class: Exploit
Event Sub Class: Directory Traversal
Behavior Indicator: Exploit
APT Related: YES
To prevent future exploits, ensure that the host and others visible to the external network have their browsers, plugins, and operating systems fully updated with the latest patches. Also, use virtual patching even if the needed patch is still not available for deployment.