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Vulnerability of Cisco IOS XE: use after free via Web UI

Synthesis of the vulnerability 

An attacker can force the usage of a freed memory area via Web UI of Cisco IOS XE, in order to trigger a denial of service, and possibly to run code.
Impacted software: Cisco ASR, Cisco Catalyst, IOS XE Cisco, Cisco Router.
Severity of this computer vulnerability: 3/4.
Creation date: 27/09/2018.
Références of this announce: CERTFR-2018-AVI-458, cisco-sa-20180926-webuidos, CSCva31961, CVE-2018-0469, VIGILANCE-VUL-27346.

Description of the vulnerability 

An attacker can force the usage of a freed memory area via Web UI of Cisco IOS XE, in order to trigger a denial of service, and possibly to run code.
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This cybersecurity threat impacts software or systems such as Cisco ASR, Cisco Catalyst, IOS XE Cisco, Cisco Router.

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

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 security threat.

Solutions for this threat 

Cisco IOS XE: solution CSCva31961.
The solution is described on the Cisco site:
  https://bst.cloudapps.cisco.com/bugsearch/bug/CSCva31961
  https://tools.cisco.com/bugsearch/bug/CSCva31961
  https://tools.cisco.com/quickview/bug/CSCva31961
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