Support Center

Burp Community

See what our users are saying about Burp Suite:

How do I?

New Post View All

Feature Requests

New Post View All

Burp Extensions

New Post View All

Bug Reports

New Post View All
Documentation

Burp Suite Documentation

Take a look at our Documentation section for full details about every Burp Suite tool, function and configuration option.

Full Documentation Contents Burp Projects
Suite Functions Burp Tools
Options Using Burp Suite
Extensibility

Burp Extender

Burp Extender lets you extend the functionality of Burp Suite in numerous ways.

Extensions can be written in Java, Python or Ruby.

API documentation Writing your first Burp Suite extension
Sample extensions View community discussions about Extensibility
Support Center Issue Definitions User agent-dependent response

User agent-dependent response

Description

Application responses may depend systematically on the value of the User-Agent header in requests. This behavior does not itself constitute a security vulnerability, but may point towards additional attack surface within the application, which may contain vulnerabilities.

This behavior often arises because applications provide different user interfaces for desktop and mobile users. Mobile interfaces have often been less thoroughly tested for vulnerabilities such as cross-site scripting, and often have simpler authentication and session handling mechanisms that may contain problems that are not present in the full interface.

To review the interface provided by the alternate User-Agent header, you can configure a match/replace rule in Burp Proxy to modify the User-Agent header in all requests, and then browse the application in the normal way using your normal browser.

Vulnerability classifications

Typical severity

Information

Type index

0x00400120

Burp Scanner Icon

Burp Scanner

This issue - and many more like it - can be found using our web vulnerability scanner

Read more
Buy Scanner Icon

Get Burp

Scan your web application from just $349.00

Try Burp Scanner Buy Burp Scanner