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feat(antivirus): extend documentation on ClamAV limitations with encrypted files #14802

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feat(antivirus): extend documentation on ClamAV limitations with encrypted files #14802

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13 changes: 13 additions & 0 deletions admin_manual/configuration_server/antivirus_configuration.rst
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Expand Up @@ -178,6 +178,19 @@ https://www.eicar.org/download-anti-malware-testfile/
Uploading the file will trigger an error:
"Virus Win.Test.EICAR_HDB-1 is detected in the file. Upload cannot be completed."

Encrypted File Detection Limitations with ClamAV
------------------------------------------------

By default, ClamAV may still return "OK" for password-protected archives and encrypted files.
This known ClamAV behavior bypasses "Block unscannable files" option of Antivirus app.
You may configure additional alert options in ``clamd.conf``, that should catch it:

* ``AlertEncryptedArchive`` - Alert on encrypted archives with heuristic signature (encrypted .zip, .7zip, .rar).
* ``AlertEncryptedDoc`` - Alert on encrypted archives with heuristic signature (encrypted .pdf).
* ``AlertEncrypted`` - Alert on both encrypted archives and documents with heuristic signature.

For reliable detection and blocking of encrypted files, consult available antivirus backends documentation.

Manage the background scanner
-----------------------------

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