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Cisco Web Security Appliance Native FTP Denial of Service Vulnerability
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
A vulnerability in the native passthrough FTP functionality of the Cisco Web Security Appliance (WSA) could allow an unauthenticated, remote attacker to cause a partial denial of service (DoS) condition due to high CPU utilization.
Insight
Insight
The vulnerability occurs when the FTP client terminates the FTP control connection when the data transfer is complete. An attacker could exploit this vulnerability by initiating FTP connections through the WSA. An exploit could allow the attacker to cause high CPU utilization of the Cisco WSA proxy process, causing a partial DoS condition. The attacker's choice of FTP client and how that client closes the FTP control connection will affect the attacker's ability to exploit this vulnerability.
Affected Software
Affected Software
See Vendor advisory.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
See Vendor advisory.