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Miggo AIGenerate vendor-ready rules for the observed attack patterns, plus reasoning and safe deployment guidance
| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| org.apache.fesod:fesod-sheet | maven | < 2.0.2-incubating | 2.0.2-incubating |
Miggo AIRoot Cause AnalysisThe analysis of the provided patches reveals that the SSRF vulnerability in Apache Fesod's UrlImageConverter component was fixed in commit af7e0fe3fd2806d29175e0fef0abb8d972f159b1. The core of the vulnerability lay in the convertToExcelData method within the org.apache.fesod.sheet.converters.url.UrlImageConverter class. The vulnerable version of this method directly used value.openConnection() on a user-provided URL, which is a classic SSRF pattern. The patch completely refactors this method, introducing a strict validation mechanism through a new UrlImageFetchPolicy. The new implementation validates the URL's scheme, resolves the hostname to its IP address, and explicitly denies requests to internal, loopback, or otherwise restricted addresses unless they are explicitly allowlisted. The vulnerable function is clearly convertToExcelData as it is the entry point for processing the malicious input (the URL) and was the subject of the security-hardening changes in the patch.
org.apache.fesod.sheet.converters.url.UrlImageConverter.convertToExcelDatafesod-sheet/src/main/java/org/apache/fesod/sheet/converters/url/UrlImageConverter.java