Wallos 4.6.0 and below: Malicious Redirects Expose Internal Resources

Summary

A security issue in Wallos' logo upload feature allows attackers to access sensitive internal resources. This could potentially lead to unauthorized access and data exposure. Update to version 4.6.1 to fix the issue.

What to do

No fix is available yet. Check with your software vendor for updates.

Affected software

Vendor	Product	Affected versions	Fix available
wallosapp	wallos	<= 4.6.1	–

Original title

Wallos is an open-source, self-hostable personal subscription tracker. Versions 4.6.0 and below contain a Server-Side Request Forgery (SSRF) vulnerability in the subscription and payment logo/icon ...

Original description

Wallos is an open-source, self-hostable personal subscription tracker. Versions 4.6.0 and below contain a Server-Side Request Forgery (SSRF) vulnerability in the subscription and payment logo/icon upload functionality. The application validates the IP address of the provided URL before making the request, but allows HTTP redirects (CURLOPT_FOLLOWLOCATION = true), enabling an attacker to bypass the IP validation and access internal resources, including cloud instance metadata endpoints. The getLogoFromUrl() function validates the URL by resolving the hostname and checking if the resulting IP is in a private or reserved range using FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE. However, the subsequent cURL request is configured with CURLOPT_FOLLOWLOCATION = true and CURLOPT_MAXREDIRS = 3, which means the request will follow HTTP redirects without re-validating the destination IP. This issue has been fixed in version 4.6.1.

nvd CVSS3.1 7.7

Vulnerability type

CWE-918 Server-Side Request Forgery (SSRF)

https://github.com/ellite/Wallos/commit/76a53df9cb4658123b8f0b7cf1826f1ba7d1c960 Patch
https://github.com/ellite/Wallos/releases/tag/v4.6.1 Product Release Notes
https://github.com/ellite/Wallos/security/advisories/GHSA-fgmf-7g5v-jmjg Exploit Mitigation Vendor Advisory