Vulnerability identifier: #VU11357

Vulnerability risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0165

CWE-ID: CWE-400

Exploitation vector: Local network

Exploit availability: No

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

Vendor: Cisco Systems, Inc

Description
The vulnerability allows an adjacent unauthenticated attacker to cause DoS condition on the target system.

The weakness exists in the Internet Group Management Protocol (IGMP) packet-processing functionality due to insufficiently processing of IGMP Membership Query packets. An adjacent attacker can send a large number of specially crafted IGMP Membership Query packets, trigger buffer exhaustion and cause the service to crash.

Mitigation
Update to versions 16.7(0.83), 16.6(1.3), 16.6(0.244), 16.3.5b, 16.3.5, 16.3(4.60), 15.2(5.5.64)E, 15.2(5.5.63)E, 15.2(5.0.73)E, 15.2(5)E, 15.2(4)E3, 15.2(4)E2, 15.2(4)E1, 3.9(0)E or 3.8(1)E.

Vulnerable software versions

Cisco IOS XE: 15.2.3 E - 16.3.3

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External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-igmp

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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 local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.