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Without this patch, a client that sends the PROT P command after a PASV or PORT command would receive data in the clear. Since standard clients do not behave this way, this represents the minimum fix: in such a scenario, an error is returned instead of transmitting the data in the clear.
Codecov Report✅ All modified and coverable lines are covered by tests. Additional details and impacted files@@ Coverage Diff @@
## main #685 +/- ##
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+ Coverage 91.08% 91.11% +0.02%
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Files 13 13
Lines 2108 2115 +7
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+ Hits 1920 1927 +7
Misses 175 175
Partials 13 13 ☔ View full report in Codecov by Harness. 🚀 New features to boost your workflow:
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Without this patch, a client that sends the PROT P command after a PASV or PORT command would receive data in the clear. Since standard clients do not behave this way, this represents the minimum fix: in such a scenario, an error is returned instead of transmitting the data in the clear.
This is a minimal port derived from the fork I use in SFTPGo Enterprise; it resolves an issue reported in the open-source version of SFTPGo, which uses the unmodified ftpserverlib.