Cyber Risks · PortSwigger Research

Encode IP

Summary: A Burp Suite BApp extension called Encode IP, authored by Eric Labrador Sainz and last updated 25 September 2023, encodes an IP address using a variety of lesser-known encoding techniques. The extension is aimed at testing vulnerabilities such as server-side request forgery, open redirect, and remote file inclusion, and PortSwigger notes that extensions are written by third-party users and come with no warranty of quality or usefulness.

What's compelling: The tool exists because IP-based filters for SSRF, open redirect, and RFI can be bypassed with lesser-known encodings, so a blocklist that only matches the plain dotted-quad form may not hold against an attacker who varies the representation.

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Topics
Vulnerabilities & Patching
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