{"id":5156,"date":"2025-04-03T07:03:58","date_gmt":"2025-04-03T07:03:58","guid":{"rendered":"https:\/\/signmycode.com\/blog\/?p=5156"},"modified":"2025-04-03T07:12:54","modified_gmt":"2025-04-03T07:12:54","slug":"what-is-server-side-request-forgery-ssrf-types-impact-mitigate-prevention","status":"publish","type":"post","link":"https:\/\/signmycode.com\/blog\/what-is-server-side-request-forgery-ssrf-types-impact-mitigate-prevention","title":{"rendered":"What is Server Side Request Forgery (SSRF)? Types, Impact, Mitigation, Prevention"},"content":{"rendered":"\n

In the past few years, the risk of cyberattacks has grown enormously. In fact, more than 800,000 people<\/a> experience data security breaches every year, which is quite concerning.<\/p>\n\n\n\n

Looking at these numbers, the safekeeping of web applications has become vital.<\/p>\n\n\n\n

Now, one significant threat to any web application<\/a> is server-side request forgery or SSRF. This cyberattack helps the hacker trick the server to reveal sensitive information or access internal systems.<\/p>\n\n\n\n

By the end of this blog, you will have a clear understanding of SSRF and how you can equip yourself to defend your web applications from attackers. Let’s begin and learn how to keep your system safe and secure.<\/p>\n\n\n\n

What is SSRF?<\/h2>\n\n\n\n

Server-side request forgery, or SSRF, is a cyber-attack where the attacker exploits vulnerabilities in a web application<\/a> to manipulate server-side requests. These attacks primarily target applications that import or allow data retrieval from URLs.<\/p>\n\n\n\n

Let’s break it down in simpler terms. <\/strong><\/em><\/p>\n\n\n\n

Imagine you\u2019re using a web app that can fetch information from other websites. You simply enter a URL, and the app gets the data for you. Sounds straightforward, right? But there\u2019s a risk here.<\/em><\/em><\/p>\n\n\n\n

A hacker can enter a malicious URL instead of a trusted one. Not being cautious, the app fetches data from this harmful URL and allows attackers to expose sensitive information or perform unwanted actions.<\/em><\/p>\n\n\n\n

SSRF is a very dangerous cyberattack<\/strong> because it exploits a server\u2019s trust within its network system. However, most organizations think traffic within their internal network is very secure and do not need strict security measures for internal communications.<\/p>\n\n\n\n

However, the fact is that attackers exploit this vulnerability and trick the server into making requests that cause severe problems, such as data breaches and unauthorized access.<\/p>\n\n\n\n

The SSRF technique can also target external systems. The attacker can use requests like scanning for open ports or interacting with APIs to attack other servers. As technology progresses, SSRF is becoming a potent technique that attackers use to serve their malicious purposes.<\/p>\n\n\n\n

Recommended: <\/strong>What is Cross Site Request Forgery (CSRF)? Example, Mitigation and Prevention<\/a><\/a><\/p>\n\n\n\n

Impact of SSRF Attacks<\/h2>\n\n\n\n

Now that we clearly understand SSRF, we will delve into the severe impacts these cyber attacks can bring to your organization.<\/p>\n\n\n\n

Data Breaches<\/h3>\n\n\n\n

This is one of the most significant risks of SSRF attacks. The attacker has the capability of tricking your server into accessing any sensitive information, such as customer data or any type of intellectual property. <\/p>\n\n\n\n

If this happens, then the organization may face a loss of trust from the customers or maybe some legal troubles, and they have to pay heavy fines as well.<\/p>\n\n\n\n

Unauthorized Access to Internal Resources<\/h3>\n\n\n\n

SSRF accounts give the hacker the chance to access your internal network as well. Once the hacker gets access to the internal system, they can harm it, install malware, and steal more data.<\/p>\n\n\n\n

Damage to Reputation<\/h3>\n\n\n\n

An SSRF attack can harm your reputation and finances as well. If your customers’ data gets leaked, they will lose faith in the company. This loss of faith will cause a drop in your sales. Also, you might face legal action and have to spend a lot of money to get rid of those legal actions.<\/p>\n\n\n\n

Recommended:<\/strong> Malware vs Virus: Similarities and Differences<\/a><\/p>\n\n\n\n

Types of SSRF Attacks<\/h2>\n\n\n\n

SSRF attacks hamper the relationship between the server and the web applications it interacts with. These attacks can harm the system by making the server perform malicious tasks<\/a> differently, as explained below.<\/p>\n\n\n\n

Let’s explore some of the common types of SSRF attacks.<\/p>\n\n\n\n

SSRF Targeting the Server<\/h3>\n\n\n\n

In this attack, the hacker can trick the web application into sending requests to the hosting server. For example, an eCommerce site checks if a product is in stock by sending a URL request to the backend API. <\/p>\n\n\n\n

But if this URL isn’t secure, the attacker can change it to point to a local URL. The server will trust this request and give the hacker unauthorized access.<\/p>\n\n\n\n

SSRF Targeting the Back End<\/h3>\n\n\n\n

Here, the hacker targets internal backend systems. These are the systems a regular user can’t access and have weak security because they\u2019re not for public use. However, the weakness gives the attacker access to sensitive internal functions, which might trick the server into interacting with internal administrative interfaces.<\/p>\n\n\n\n

Blind SSRF<\/h3>\n\n\n\n

In blind SSRF, the attacker can’t directly see the response from the server. In this attack, they make the server perform harmful tasks. For example, the attacker might request a large file repeatedly to cause the server to crash, resulting in a denial of service (DoS) attack.<\/p>\n\n\n\n

In our next section, we will be learning more about Blind SSRF and how you can combat it.<\/p>\n\n\n\n

Blind SSRF Vulnerabilities<\/h2>\n\n\n\n

Blind SSRF vulnerabilities are tricky techniques because you can’t see any response in this one. However, below are some of the best ways to find these vulnerabilities<\/strong>:<\/p>\n\n\n\n