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Vulnerability of Cisco IOS XE: privilege escalation via ISDN Data Leak

Synthesis of the vulnerability 

An attacker can bypass restrictions via ISDN Data Leak of Cisco IOS XE, in order to escalate his privileges.
Vulnerable systems: Cisco ASR, Cisco Catalyst, IOS XE Cisco, Cisco Router.
Severity of this threat: 2/4.
Creation date: 26/09/2019.
Références of this weakness: cisco-sa-20190925-isdn-data-leak, CSCvk42668, CVE-2019-12664, VIGILANCE-VUL-30434.

Description of the vulnerability 

An attacker can bypass restrictions via ISDN Data Leak of Cisco IOS XE, in order to escalate his privileges.
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This security 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 weakness note is medium.

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 alert.

Solutions for this threat 

Cisco IOS XE: solution CSCvk42668.
The solution is described on the Cisco site:
  https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvk42668
  https://tools.cisco.com/bugsearch/bug/CSCvk42668
  https://tools.cisco.com/quickview/bug/CSCvk42668
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