CAPEC-465 Transparent Proxy Abuse

CAPEC ID: 465

CAPEC-465 Metadata

Likelihood of Attack

High

Typical Severity

Medium

Overview

Summary

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

Potential Solutions / 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.

Related Weaknesses (CWE)

CWE ID Description
CWE-441 Unintended Proxy or Intermediary ('Confused Deputy')

Related CAPECs

CAPEC ID Description
CAPEC-554 An adversary attacks a system by bypassing some or all functionality intended to protect it. Often, a system user will think that protection is in place, but the functionality behind those protections has been disabled by the adversary.

Taxonomy Mappings

Taxonomy: ATTACK

Entry ID Entry Name
1090.001 Proxy: Internal Proxy

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