A vulnerability classified as problematic has been found in FreshRSS (version unknown). Affected is the function authorizationToUser of the file greader.php of the component greader API. The manipulation with an unknown input leads to a log file vulnerability. CWE is classifying the issue as CWE-532. Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information. This is going to have an impact on confidentiality. CVE summarizes:

FreshRSS is a self-hosted RSS feed aggregator. When using the greader API, the provided password is logged in clear in `users/_/log_api.txt` in the case where the authentication fails. The issues occurs in `authorizationToUser()` in `greader.php`. If there is an issue with the request or the credentials, `unauthorized()` or `badRequest()` is called. Both these functions are printing the return of `debugInfo()` in the logs. `debugInfo()` will return the content of the request. By default, this will be saved in `users/_/log_api.txt` and if the const `COPY_LOG_TO_SYSLOG` is true, in syslogs as well. Exploiting this issue requires having access to logs produced by FreshRSS. Using the information from the logs, a malicious individual could get users' API keys (would be displayed if the users fills in a bad username) or passwords.

The weakness was published 03/07/2023 as GHSA-8vvv-jxg6-8578. The advisory is available at github.com. This vulnerability is traded as CVE-2023-22481 since 12/29/2022. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1592 by the MITRE ATT&CK project.

By approaching the search of inurl:greader.php it is possible to find vulnerable targets with Google Hacking.

Applying the patch 075cf4c800063e3cc65c3d41a9c23222e8ebb554 is able to eliminate this problem. The bugfix is ready for download at github.com.

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• FreshRSS

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• open-source

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• 🔍

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