A vulnerability in the web-based management interface of Cisco AsyncOS for Cisco Email Security Appliance (ESA), Cisco Web Security Appliance (WSA), and Cisco Content Security Management Appliance (SMA) 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 trigger a prolonged status of high CPU utilization relative to the GUI 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.

According to its self-reported version, the Cisco Web Security Appliance is affected by a Denial of Service vulnerability. 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 trigger a prolonged status of high CPU utilization relative to the GUI process(es).

Please see the included Cisco BIDs and the Cisco Security Advisory for more information.

According to its self-reported version, the Cisco Content Security Management Appliance (SMA) is affected by a Denial of Service vulnerability. 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 trigger a prolonged status of high CPU utilization relative to the GUI process(es).

Please see the included Cisco BIDs and the Cisco Security Advisory for more information.

According to its self-reported version, the Cisco Email Security Appliance (ESA) is affected by a Denial of Service vulnerability. 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 trigger a prolonged status of high CPU utilization relative to the GUI process(es).

Please see the included Cisco BIDs and the Cisco Security Advisory for more information.

ID	Name	Product	Family	Severity
134446	Cisco Web Security Appliance (WSA) GUI Denial of Service Vulnerability	Nessus	CISCO	medium
134445	Cisco Content Security Management Appliance (SMA) GUI Denial of Service Vulnerability	Nessus	CISCO	medium
134444	Cisco Email Security Appliance (ESA) GUI Denial of Service Vulnerability	Nessus	CISCO	medium

Detections

Analytics

CVE-2020-3164

medium

Tenable Plugins

medium

medium

medium