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Vulnerability of Cisco AsyncOS: denial of service via FTP

Synthesis of the vulnerability 

An attacker can send malicious FTP packets to Cisco AsyncOS, in order to trigger a denial of service.
Vulnerable products: AsyncOS, Cisco Content SMA, Cisco ESA, Cisco WSA.
Severity of this weakness: 2/4.
Creation date: 29/09/2016.
Références of this bulletin: cisco-sa-20160928-aos, CSCuz82907, CSCuz84330, CSCuz86065, CVE-2016-6416, VIGILANCE-VUL-20718.

Description of the vulnerability 

The Cisco AsyncOS product has a service to manage received FTP packets.

However, when numerous FTP packets are received, a fatal error occurs.

An attacker can therefore send malicious FTP packets to Cisco AsyncOS, in order to trigger a denial of service.
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This computer threat alert impacts software or systems such as AsyncOS, Cisco Content SMA, Cisco ESA, Cisco WSA.

Our Vigil@nce team determined that the severity of this weakness announce is medium.

The trust level is of type confirmed by the editor, with an origin of internet client.

An attacker with a expert ability can exploit this computer weakness bulletin.

Solutions for this threat 

Cisco AsyncOS: solution CSCuz82907 CSCuz84330 CSCuz86065.
The solution CSCuz82907, CSCuz84330 or CSCuz86065 is available:
  https://tools.cisco.com/bugsearch/bug/CSCuz82907
  https://tools.cisco.com/quickview/bug/CSCuz82907
  https://tools.cisco.com/bugsearch/bug/CSCuz84330
  https://tools.cisco.com/quickview/bug/CSCuz84330
  https://tools.cisco.com/bugsearch/bug/CSCuz86065
  https://tools.cisco.com/quickview/bug/CSCuz86065
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