A vulnerability in the web proxy functionality of Cisco AsyncOS Software for Cisco Web Security Appliance (WSA) could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
The vulnerability is due to insufficient input validation mechanisms for certain fields in HTTP/HTTPS requests sent through an affected device. A successful attacker could exploit this vulnerability by sending a malicious HTTP/HTTPS request through an affected device. An exploit could allow the attacker to force the device to stop processing traffic, resulting in a DoS condition.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-asyncos-wsa [“https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190703-asyncos-wsa”]
Vendor | Product | Version | CPE |
---|---|---|---|
cisco | web_security_appliance_\(wsa\) | any | cpe:2.3:a:cisco:web_security_appliance_\(wsa\):any:*:*:*:*:*:*:* |
cisco | web_security_virtual_appliance | any | cpe:2.3:a:cisco:web_security_virtual_appliance:any:*:*:*:*:*:*:* |