What You Need To Know About Server Side Request Forgery (SSRF)


SSRF or Server Side Request Forgery is an attack vector that has been around for a long time, but do you actually know what it is?

Server Side Request Forgery (SSRF) refers to an attack where in an attacker is able to send a crafted request from a vulnerable web application. SSRF is usually used to target internal systems behind firewalls that are normally inaccessible to an attacker from the external network.

What You Need To Know About SSRF - Server Side Request Forgery

Typically Server Side Request Forgery (SSRF) occurs when a web application is making a request, where an attacker has full or partial control of the request that is being sent. A common example is when an attacker can control all or part of the URL to which the web application makes a request to some third-party service.

There are various things you can use SSRF for such as:

  • Scanning other machines within the private network of the vulnerable server that aren’t externally accessible
  • Performing Remote File Inclusion (RFI) attacks
  • Bypassing firewalls and use the vulnerable server to carry out malicious attacks
  • Retrieving server files (including /etc/passwd etc)

This is example code in PHP that is vulnerable to SSRF:

You can read more from Acunetix here:

What is Server Side Request Forgery (SSRF)?

Posted in: Exploits/Vulnerabilities

, , ,


Latest Posts:


Socialscan - Command-Line Tool To Check For Email And Social Media Username Usage Socialscan – Command-Line Tool To Check For Email And Social Media Username Usage
socialscan is an accurate command-line tool to check For email and social media username usage on online platforms, given an email address or username,
CFRipper - CloudFormation Security Scanning & Audit Tool CFRipper – CloudFormation Security Scanning & Audit Tool
CFRipper is a Python-based Library and CLI security analyzer that functions as an AWS CloudFormation security scanning and audit tool
CredNinja - Test Credential Validity of Dumped Credentials or Hashes CredNinja – Test Credential Validity of Dumped Credentials or Hashes
CredNinja is a tool to quickly test credential validity of dumped credentials (or hashes) across an entire network or domain very efficiently.
assetfinder - Find Related Domains and Subdomains assetfinder – Find Related Domains and Subdomains
assetfinder is a Go-based tool to find related domains and subdomains that are related to a given domain from a variety of sources including Facebook and more.
Karkinos - Beginner Friendly Penetration Testing Tool Karkinos – Beginner Friendly Penetration Testing Tool
Karkinos is a light-weight Beginner Friendly Penetration Testing Tool, which is basically a 'Swiss Army Knife' for pen-testing and/or hacking CTF's.
Aclpwn.Py - Exploit ACL Based Privilege Escalation Paths in Active Directory Aclpwn.Py – Exploit ACL Based Privilege Escalation Paths in Active Directory
Aclpwn.py is a tool that interacts with BloodHound< to identify and exploit ACL based privilege escalation paths.


2 Responses to What You Need To Know About Server Side Request Forgery (SSRF)

  1. bughunter August 18, 2017 at 8:40 pm #

    https://github.com/cujanovic/SSRF-Testing

    • Darknet August 18, 2017 at 11:44 pm #

      Oh that’s nice, thanks!