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Cisco Bug: CSCvv76226 - ESA: DANE DNS cache query can cause application fault

Last Modified

Oct 16, 2020

Products (1)

  • Cisco IronPort Email Security Appliance Software

Known Affected Releases

13.0.0-391 13.0.0-392 13.5.1-277

Description (partial)

Symptom:
These application faults are caused by an internal faulty DNS cache query. 

Critical: An application fault occurred: ('egg/smtp_client.py tls_connect_with_dane|2382', "<type 'exceptions.TypeError'>", "'NoneType' object is unsubscriptable", '[egg/smtp_client.py run|984] [egg/smtp_client.py _run|1031] [egg/smtp_client.py _connect|1398] [egg/smtp_client.py tls_connect_with_dane|2382]')

Critical: An application fault occurred: ('egg/smtp_client.py tls_connect_with_dane|2388', "<type 'exceptions.TypeError'>", "'NoneType' object is unsubscriptable", '[egg/smtp_client.py run|984] [egg/smtp_client.py _run|1031] [egg/smtp_client.py _connect|1398] [egg/smtp_client.py tls_connect_with_dane|2388]')

Conditions:
Running AsyncOS 13.5.1 code with DANE enabled.
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