CSCvy77378 - FED fails regularly with weird exception and alert

[ironport4she]

We never had an isue with this bug with AsyncOS > 14.x. But since some weeks (with AsyncOS 15.0.0-104) we get mutliple times a week emails with this warnings:

Warning <System> mailserver.she.de: Invalid SimpleFilter: Forged_EMail_Detection rule: <filters....

Invalid SimpleFilter: Forged_EMail_Detection rule: <filters.Forged_Email_Detection instance at 0x13a0b1320>('egg/cdict.py search_fuzzy_address_iter|466', "<type 'exceptions.ValueError'>", 'list.index(x): x not in list', '[egg/filters.py process|16062] [egg/filters.py eval|5854] [egg/filters.py _get_fuzzy_score|5951] [egg/cdict.py search_fuzzy_address_iter|466]')

Version: 15.0.0-104
Serial Number: 34ED1B99415A-WZP233603PU
Timestamp: 15 Mar 2024 10:03:43 +0100

This is really weird
Regards Ralf

[marce1000]

            - FYI : https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvy77378
                - Apparently the problem can also be triggered during high load ,

 M.

[ironport4she]

I got an update from Cisco Support. Our issue is related to CSCwi15504 (ENH: Provide support for special characters like "é, ü, ë ..etc" for filrters using FED): https://bst.cloudapps.cisco.com/bugsearch/bug/CSCwi15504

I've deleted now all non-English characters from the FED dictionary and have to wait until this bug is fixed in some future AsyncOS releases

Regards
Ralf