Vulnerability identifier: #VU6181

Vulnerability risk: High

CVSSv3.1: 7.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:H/RL:U/RC:C]

CVE-ID: CVE-2016-1409

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco IOS XR
Operating systems & Components / Operating system
Cisco IOS
Operating systems & Components / Operating system
Cisco IOS XE
Operating systems & Components / Operating system

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to a logic error when parsing IPv6 Neighbor Discovery (ND) packets, sent directly to the device. A remote attacker can send specially crafted IPv6 traffic to the affected device and cause the device to stop processing IPv6 traffic.

Successful exploitation of the vulnerability will result in denial of service attack.

Note: according to Cisco, this vulnerability is being exploited in the wild.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Cisco IOS XR: All versions

Cisco IOS: All versions

Cisco IOS XE: All versions

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160525-ipv6

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.