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Cisco Bug: CSCzv67686 - [Friendlies]: Application fault in egg/coro_ssl.py

Last Modified

May 14, 2019

Products (1)

  • Cisco Email Security Appliance

Known Affected Releases

8.0.0-000 8.0.0-388 8.0.0-beta2-618 8.0.1-000 8.0.2-000 8.5.6-092 9.1.0-032

Description (partial)

<B>Symptom:</B>
Following Application fault received from the Cisco Email Security Appliance.
---
An application fault occurred: ('egg/coro_ssl.py _non_blocking_retry|140', 
"<class 'sslip.Error'>", "(336195711, 'error:1409F07F:SSL 
routines:SSL3_WRITE_PENDING:bad write retry')", '[egg/smtp_client.py run|885] 
[egg/smtp_client.py _run|964] [egg/coro_ssl.py close|238] [egg/coro_ssl.py shutdown|218] 
[egg/coro_ssl.py _non_blocking_retry|140]')
---
The app-fault occurred when the ESA was closing an SSL/TLS socket on the incoming mail side -- 
presumably when accepting an email over a TLS connection. The error indicates that the 
ESA's SSL library thinks the TLS packet received from the email client was malformed.

<B>Conditions:</B>
Incoming TLS connections to the ESA can cause the Application Fault error message.
The problem is occurring when one of the following ciphers is selected by ESA
DHE-RSA-AES256-SHA256
DHE-RSA-AES128-SHA256

Related Community Discussions

&quot;An application fault occurred&quot; with AsyncOS 8.0.1 on multiple ESAs
Ever since upgrading to AsyncOS 8.0.1-023, we have been getting the following application fault intermittently but it has been triggering constantly this morning on all 4 appliances in a cluster and 2 others in a separate cluster: An application fault occurred: ('egg/coro_ssl.py _non_blocking_retry|140', &quot;&lt;class 'sslip.Error'&gt;&quot;, &quot;(336195711, 'error:1409F07F:SSL routines:SSL3_WRITE_PENDING:bad write retry')&quot;, '[egg/smtp_client.py run|885] [egg/smtp_client.py _run|964] [egg/coro_ssl.py close|238] [egg/coro_ssl.py ...
Latest activity: Aug 30, 2017
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
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  • Related Community Discussions
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