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Vulnerability DatabaseCVE-2021-3846
CVE-2021-3846:
PHP vulnerability analysis and mitigation
Overview
A vulnerability identified as CVE-2021-3846 was discovered in Firefly III, related to file upload functionality (CWE-434). The issue was identified and documented in 2021 (NVD).
Technical details
The vulnerability is classified as CWE-434, which relates to Unrestricted Upload of File with Dangerous Type. The issue was specifically found in the attachment handling functionality of Firefly III, where temporary files were not being properly closed and deleted (GitHub Commit).
Impact
The vulnerability could potentially lead to resource exhaustion due to temporary files not being properly cleaned up in the system.
Exploitability
The vulnerability was discovered in the file upload functionality of Firefly III's API, specifically in the attachment handling process.
Mitigation and workarounds
A fix was implemented through a code commit that ensures temporary files are properly closed and deleted after processing. The specific change added a fclose($resource) call to properly handle file resources (GitHub Commit).
Additional resources
Source: This report was generated using AI
Related PHP vulnerabilities:
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