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Vulnerability of Cisco IP Phone 7800/8800: privilege escalation via SIP Web Management Interface Crafted Credentials

Synthesis of the vulnerability 

An attacker can bypass restrictions via SIP Web Management Interface Crafted Credentials of Cisco IP Phone 7800/8800, in order to escalate his privileges.
Vulnerable software: Cisco IP Phone.
Severity of this announce: 3/4.
Creation date: 21/03/2019.
Références of this computer vulnerability: cisco-sa-20190320-ip-phone-rce, CSCvn56168, CSCvn72540, CSCvo05687, CVE-2019-1716, VIGILANCE-VUL-28795.

Description of the vulnerability 

An attacker can bypass restrictions via SIP Web Management Interface Crafted Credentials of Cisco IP Phone 7800/8800, in order to escalate his privileges.
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This vulnerability announce impacts software or systems such as Cisco IP Phone.

Our Vigil@nce team determined that the severity of this cybersecurity threat is important.

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

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

Solutions for this threat 

Cisco IP Phone 7800/8800: solution CSCvn56168 CSCvn72540 CSCvo05687.
The solution is described on the Cisco site:
  https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvn56168
  https://tools.cisco.com/bugsearch/bug/CSCvn56168
  https://tools.cisco.com/quickview/bug/CSCvn56168
  https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvn72540
  https://tools.cisco.com/bugsearch/bug/CSCvn72540
  https://tools.cisco.com/quickview/bug/CSCvn72540
  https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvo05687
  https://tools.cisco.com/bugsearch/bug/CSCvo05687
  https://tools.cisco.com/quickview/bug/CSCvo05687
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