dgtlmoon changedetection.io up to 0.47.5 URL Protocol path traversal

Summaryinfo

A vulnerability, which was classified as critical, was found in dgtlmoon changedetection.io up to 0.47.5. Affected is an unknown function of the component URL Protocol Handler. Such manipulation leads to path traversal. This vulnerability is uniquely identified as CVE-2024-51998. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in dgtlmoon changedetection.io up to 0.47.5. Affected by this issue is some unknown functionality of the component URL Protocol Handler. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality. CVE summarizes:

changedetection.io is a free open source web page change detection tool. The validation for the file URI scheme falls short, and results in an attacker being able to read any file on the system. This issue only affects instances with a webdriver enabled, and `ALLOW_FILE_URI` false or not defined. The check used for URL protocol, `is_safe_url`, allows `file:` as a URL scheme. It later checks if local files are permitted, but one of the preconditions for the check is that the URL starts with `file://`. The issue comes with the fact that the file URI scheme is not required to have double slashes. This issue has been addressed in version 0.47.06 and all users are advised to upgrade. There are no known workarounds for this vulnerability.

The advisory is available at github.com. This vulnerability is handled as CVE-2024-51998 since 11/04/2024. The exploitation is known to be easy. The attack may be launched remotely. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1006 by the MITRE ATT&CK project.

Upgrading to version 0.47.06 eliminates this vulnerability. Applying the patch 49bc982c697169c98b79698889fb9d26f6b3317f is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• dgtlmoon

Name

• changedetection.io

Version

• 0.47.0
• 0.47.1
• 0.47.2
• 0.47.3
• 0.47.4
• 0.47.5

License

• open-source

Website

• Product: https://github.com/dgtlmoon/changedetection.io/

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