DETECTION OVERVIEW
Risk Factors
Pulse Connect Secure (PCS) VPN gateways are commonly deployed in enterprise environments to manage TLS VPN connections that originate from the internet. This vulnerability is well known and a popular target among advanced persistent threat (APT) groups. This vulnerability enables unauthorized attackers to steal sensitive data to facilitate additional attacks on the network.
Category

A PCS is a VPN gateway application that authorizes external access to internal network resources. The PCS application has a vulnerability that enables an attacker to bypass authentication to access internal files or directories. The attacker submits an HTTP request with a malicious URI. This URI includes path traversal elements in both the path and query (such as /dana-na/../dana/html5acc/guacamole/../../../../../../etc/passwd?/dana/html5acc/guacamole/). The path traversal enables authentication bypass and access to the target path specified prior to the HTTP query . The attacker then has read access to local files on the device.
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