CAPEC-465

Standard Abstraction Level
Meta — Very abstract, high-level category
Standard — Specific enough to understand
Detailed — Tied to specific technique Draft MITRE CAPEC Status
Stable — Fully reviewed and complete
Draft — Under development
Incomplete — Partially defined
Deprecated — No longer recommended
Obsolete — Replaced by another CAPEC Severity: Medium
Transparent Proxy Abuse

Description

A transparent proxy serves as an intermediate between the client and the internet at large. It intercepts all requests originating from the client and forwards them to the correct location. The proxy also intercepts all responses to the client and forwards these to the client. All of this is done in a manner transparent to the client.

Prerequisites

Transparent proxy is usedVulnerable configuration of network topology involving the transparent proxy (e.g., no NAT happening between the client and the proxy)Execution of malicious Flash or Applet in the victim's browser

Mitigations

Design: Ensure that the transparent proxy uses an actual network layer IP address for routing requests. On the transparent proxy, disable the use of routing based on address information in the HTTP host header.

Configuration: Disable in the browser the execution of Java Script, Flash, SilverLight, etc.

Skills Required

[Medium] Creating malicious Flash or Applet to open a cross-domain socket connection to a remote system