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Vulnerability of Cisco Email Security Appliance: privilege escalation via Filter Bypass

Synthesis of the vulnerability 

An attacker can bypass restrictions via Filter Bypass of Cisco Email Security Appliance, in order to escalate his privileges.
Impacted products: AsyncOS, Cisco ESA.
Severity of this bulletin: 2/4.
Creation date: 02/05/2019.
Références of this threat: cisco-sa-20190501-esa-bypass, CSCvm36810, CVE-2019-1844, VIGILANCE-VUL-29187.

Description of the vulnerability 

An attacker can bypass restrictions via Filter Bypass of Cisco Email Security Appliance, in order to escalate his privileges.
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This computer weakness announce impacts software or systems such as AsyncOS, Cisco ESA.

Our Vigil@nce team determined that the severity of this security alert is medium.

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

An attacker with a expert ability can exploit this vulnerability.

Solutions for this threat 

Cisco Email Security Appliance: solution CSCvm36810.
The solution is described on the Cisco site:
  https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvm36810
  https://tools.cisco.com/bugsearch/bug/CSCvm36810
  https://tools.cisco.com/quickview/bug/CSCvm36810
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