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:


SecLists - Usernames, passwords, URLs, sensitive data patterns, fuzzing payloads, web shells SecLists – Usernames, passwords, URLs, sensitive data patterns, fuzzing payloads, web shells
SecLists is the security tester's companion. It's a collection of multiple types of lists used during security assessments, collected in one place.
DeepSound - Audio Steganography Tool DeepSound – Audio Steganography Tool
DeepSound is an audio steganography tool and audio converter that hides secret data into audio files, the application also enables you to extract from files.
2019 High Severity Vulnerabilities What are the MOST Critical Web Vulnerabilities in 2019?
So what is wild on the web this year? Need to know about the most critical web vulnerabilities in 2019 to protect your organization?
GoBuster - Directory/File & DNS Busting Tool in Go GoBuster – Directory/File & DNS Busting Tool in Go
GoBuster is a tool used to brute-force URIs (directories and files) in web sites and DNS subdomains (inc. wildcards) - a directory/file & DNS busting tool.
BDFProxy - Patch Binaries via MITM - BackdoorFactory + mitmProxy BDFProxy – Patch Binaries via MiTM – BackdoorFactory + mitmproxy
BDFProxy allows you to patch binaries via MiTM with The Backdoor Factory combined with mitmproxy enabling on the fly patching of binary downloads
Domained - Multi Tool Subdomain Enumeration Domained – Multi Tool Subdomain Enumeration
Domained is a multi tool subdomain enumeration tool that uses several subdomain enumeration tools and wordlists to create a unique list of subdomains.


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!