CVE-2024-37383 - Roundcube Webmail XSS Vulnerability - Exploit Details, Code Snippet and Original References

Roundcube Webmail is a popular open-source webmail solution used by many organizations and individuals worldwide. Recently, a security vulnerability has been discovered in Roundcube Webmail, which may potentially allow attackers to execute a cross-site scripting (XSS) attack by exploiting certain SVG animate attributes.

This blog post discusses in detail the CVE-2024-37383 vulnerability affecting Roundcube Webmail versions before 1.5.7 and 1.6.x versions before 1.6.7, its exploit details, code snippet, as well as links to original references.

CVE Details

CVE ID: CVE-2024-37383
Affected Versions: Roundcube Webmail before 1.5.7 and 1.6.x before 1.6.7
Vulnerability Type: XSS (Cross-Site Scripting) via SVG animate attributes
Severity: Medium
Status: Fixed in Roundcube Webmail 1.5.7 and 1.6.7

Exploit Details

This XSS vulnerability exists due to insufficient input validation in Roundcube Webmail while handling SVG images. An attacker can exploit this vulnerability by crafting an SVG image with malicious animate attributes and sending it via an email to the target user. Once the email is viewed by the target user in their Roundcube Webmail client, the malicious code will be executed within the user's webmail session context, potentially leading to unauthorized access or further damage to the user's webmail client.

Code Snippet

Here’s a code snippet that demonstrates how an SVG image with malicious animate attributes may look like:

<svg xmlns="http://www.w3.org/200/svg"; xmlns:xlink="http://www.w3.org/1999/xlink"; width="200" height="200">
  <circle cx="100" cy="100" r="80" fill="red">
    <animate attributeName="fill" begin="mouseover" from="red" to="blue" dur="1s" repeatCount="indefinite" />
  </circle>
  <script>alert('XSS');</script>
</svg>

In the abovementioned code snippet, the SVG image contains a <script> tag that triggers an alert popup with the message 'XSS.' When the target user views the email containing this SVG image in their Roundcube Webmail client, the <script> tag will be executed, indicating that an XSS attack is successful.

Original References

1. Official Roundcube Webmail advisory detailing the issue: https://github.com/roundcube/roundcubemail/releases/tag/1.6.7

2. CVE-2024-37383 entry in the National Vulnerability Database (NVD) with additional details: https://nvd.nist.gov/vuln/detail/CVE-2024-37383

Mitigation and Recommendation

To fix this vulnerability, it is highly recommended to upgrade your Roundcube Webmail installation to the latest version (1.5.7 or 1.6.7, depending on your current version):

- Roundcube Webmail 1.5.x -> 1.5.7: https://github.com/roundcube/roundcubemail/releases/tag/1.5.7
- Roundcube Webmail 1.6.x -> 1.6.7: https://github.com/roundcube/roundcubemail/releases/tag/1.6.7

Conclusion

CVE-2024-37383 is a potentially severe XSS vulnerability affecting Roundcube Webmail installations before 1.5.7 and 1.6.x before 1.6.7. This post provided insights into the exploit details, code snippet, and original references related to the vulnerability. Users are advised to upgrade their Roundcube Webmail installations to the latest version to mitigate the risk associated with this vulnerability. Always ensure that you apply security patches and maintain an up-to-date application to safeguard against known vulnerabilities and threats.

Timeline

Published on: 06/07/2024 04:15:30 UTC
Last modified on: 07/03/2024 02:04:16 UTC