In this post, we will delve deep into a newly discovered security vulnerability in Fiori Launchpad, affecting its versions 754, 755, and 756. This critical vulnerability, identified as CVE-2022-26101, can lead to malicious Cross-Site Scripting (XSS) attacks due to insufficient encoding of user-controlled inputs. We will discuss what this vulnerability is, how it works, and how an attacker might exploit it.
Vulnerability Details
Fiori Launchpad (CVE-2022-26101) is a Cross-Site Scripting (XSS) vulnerability affecting the SAP Fiori front-end server, specifically in versions 754, 755, and 756. It arises due to the application's inability to properly encode user-controlled inputs. As a result, attackers can inject malicious code into web pages viewed by unsuspecting users. This can lead to data theft, unauthorized account access, and other nefarious activities.
To better understand how this exploit works, let's look at a simple code snippet that demonstrates the issue:
Code Snippet
<!-- This is a vulnerable input field in Fiori Launchpad -->
<input type="text" name="search" id="search" value="">
An attacker can inject JavaScript code into the input field like this
<!-- This is the attacker's malicious input -->
"><script>alert('xss');</script>
When the rendered HTML page doesn't correctly escape or sanitize this input, it can result in code execution. The affected Fiori Launchpad versions do not sufficiently encode user inputs, making them susceptible to this kind of vulnerability.
Exploiting the Vulnerability
To demonstrate how an attacker can exploit this vulnerability, let's use a simple proof-of-concept (PoC):
`
">alert('xss');
`
4. Observe how the script gets executed when the input is submitted to the server. The alert('xss') should pop up on the screen, indicating that the injected code is being executed.
Remember, this is only an example, and a real attack can have much more severe consequences such as stealing sensitive data, compromising user accounts or gaining unauthorized access to the system.
The following resources provide more information on CVE-2022-26101
1. CVE-2022-26101 Official Webpage
2. SAP Security Note 3122538 - A detailed report on the vulnerability.
Mitigation and Prevention
SAP has released a security patch for the affected Fiori Launchpad versions (754, 755, and 756) to address this issue. Users are advised to apply the patch as soon as possible to eliminate the risk of XSS attacks. Moreover, it is crucial for application developers to implement proper input validation, input sanitization, and output encoding mechanisms to thwart future vulnerabilities.
Conclusion
In this post, we covered the details of the Fiori Launchpad Cross-Site Scripting (XSS) vulnerability designated as CVE-2022-26101. The vulnerability affects versions 754, 755, and 756 of the SAP Fiori front-end server. Attackers can exploit this weakness by injecting malicious scripts into user-controlled input fields, leading to severe security consequences such as data theft and unauthorized access. To avoid falling prey to XSS attacks, ensure that you're using the latest patch provided by SAP and adopt robust defensive coding practices.
Timeline
Published on: 03/10/2022 17:47:00 UTC
Last modified on: 06/21/2022 22:15:00 UTC