Rule Category

SERVER-WEBAPP -- Snort has detected traffic exploiting vulnerabilities in web based applications on servers.

Alert Message

SERVER-WEBAPP Microsoft Exchange Control Panel static viewstate key use attempt

Rule Explanation

This rule will look for attempts to use a hard-coded __VIEWSTATEGENERATOR key in requests to Microsoft's Exchange Control Panel. Microsoft recently patched a vulnerability in its Microsoft Exchange Installations that was causing them to use static/hard-coded keys. Knowledge of these keys can allow attackers to trick the exchange servers into deserializing ViewState data for remote code execution purposes. This rule will alert on use of those hard-coded keys.

What To Look For

This rule will fire on attempts to use a hard-coded __VIEWSTATEGENERATOR key in requests to Microsoft's Exchange Control Panel.

Known Usage

No public information

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

Rule Groups

No rule groups

CVE

Additional Links

Rule Vulnerability

CVE Additional Information

This product uses data from the NVD API but is not endorsed or certified by the NVD.
CVE-2020-0688
Loading description

MITRE ATT&CK Framework

Tactic: Execution

Technique: Exploitation for Client Execution

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