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Cisco Bug: CSCvs33306 - Cisco Web Security Appliance GUI Denial of Service Vulnerability

Last Modified

Jul 06, 2020

Products (1)

  • Cisco Web Security Appliance

Known Affected Releases

11.7.1-020

Description (partial)

Symptom:
A vulnerability in the web-based management interface of Cisco AsyncOS for Cisco Web Security Appliance (WSA) could allow an unauthenticated remote attacker to cause high CPU usage on an affected device, resulting in a denial of service (DoS) condition.

The vulnerability is due to improper validation of specific HTTP request headers. An attacker could exploit this vulnerability by sending a malformed HTTP request to an affected device. A successful exploit could allow the attacker to could allow the attacker to trigger a prolonged status of high CPU utilization relative to the graphical user interface process(es). Upon successful exploitation of this vulnerability, an affected device will still be operative, but its response time and overall performance may be degraded.

There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cont-sec-gui-dos-nJ625dXb

Conditions:
Device running with the default configuration
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