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Vulnerability of Cisco IOS, IOS XE: bypassing NTP access-group

Synthesis of the vulnerability 

An attacker can bypass NTP access-group of Cisco IOS or IOS XE, in order to access to the NTP service.
Impacted products: IOS by Cisco, IOS XE Cisco, Cisco Router.
Severity of this bulletin: 2/4.
Creation date: 09/07/2014.
Références of this threat: CSCuj66318, CVE-2014-3309, VIGILANCE-VUL-15015.

Description of the vulnerability 

The access-group command defines the NTP service access.

However, an attacker can bypass this configuration.

An attacker can therefore bypass NTP access-group of Cisco IOS or IOS XE, in order to access to the NTP service.
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This weakness bulletin impacts software or systems such as IOS by Cisco, IOS XE Cisco, Cisco Router.

Our Vigil@nce team determined that the severity of this computer weakness 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 vulnerability announce.

Solutions for this threat 

Cisco IOS, IOS XE: solution CSCuj66318.
The solution CSCuj66318 is available:
  https://tools.cisco.com/bugsearch/bug/CSCuj66318
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