Cisco Bug: CSCsh33982 – (E)SMTP Multiple Content-Type headers check is wrong

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Last Modified

Sep 23, 2017

Products (1)

  • Cisco ASA 5500-X Series Firewalls

Known Affected Releases

7.2(1.25) 7.2(2)

Description (partial)

Symptom:
   
 The SMTP inspection make checks of the header Content-Type and limits it to
 one in the header section and one in the data section.The body of a SMTP packet
 may be dropped by the security appliance in some scenarios. dropped from an
 SMTP communication.  The client retransmits until it gives up. 
   
  Conditions:
   
  These symptoms are experienced if SMTP inspection is enabled in the Cisco
  PIX/ASA security appliance.

Related Community Discussions

Turning off ESMTP inspection in the ASAWe have an ASA5550 running 7.2 code and we have had to turn off the inspect esmtp to get all mail to pass. At first, I thought maybe an extended command that wasn’t supported was the problem, but this is the synopsis from our server guy: The SMTP problem was not a command level problem. It appears that the firewall was rejecting the SMTP session mid-transaction. At times I would see our server issue a 354 (ok, send the body) response to the client and then I wouldn’t see anything further from the …Latest activity: Oct 31, 2007

Source : https://quickview.cloudapps.cisco.com/quickview/bug/CSCsh33982

Bài trướcExchange 2013 / 2016 Enabling TLS 1.2
Bài tiếp theoWhy do you see XXXXXXXA after EHLO and “500 #5.5.1 command not recognized” after STARTTLS?
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Hi, Nguyen Van Phuong is the owner of the website viettechgroup.vn. I 've been working in the IT sector since 2008. With nearly 11 years experience in the fields of design development, Governance, operating system enterprise network infrastructure.. I'm now a senior Infrastructure Administrator for the Enterprise network. Achivements: IT Project management IT management System and Network IT Security and data protection. Plan and bugged for Infrastructure and Security Deployment system Server (HP, IBM, Lenovo, Dell..), Network (Cisco, Juniper, Enterasys,..), PABX system, Firewall (Cisco ASA 5525-x, Juniper SSG520,..) Network system administration and maintenance: +Management all network configure IT system: AD, DNS, DHCP, Cores switch, Access switch, Router, Firewall, etc. Design & implement IT system, project management and manage IT operation, I also have extensive experience of ERP System base SQL , HRM, etc. Vendor/external system integrator management: support other department in terms of technical specifications for cost optimize, business process efficiency, procurement spend compliance. Virtualization System Deployment on Microsoft Windows Server 2016 (Hyper-V) and VMware ( Vmware vSphere 5.5, 6.5,6.7 vCenter) Backup and restore management on Symantec backup products (Veritas Backup 16, 20, 20.1, 20.2 ), Veeam Backup & Replication 9.0, 9.5U1, 9.5U2 U3, U4

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