Vulnerability identifier: #VU11342

Vulnerability risk: High

CVSSv3.1: 9.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2018-0151

CWE-ID: CWE-120

Exploitation vector: Network

Exploit availability: No

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

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote unauthenticated attacker to cause DoS condition or execute arbitrary code on the target system.

The weakness exists due to boundary error in packets that are destined for UDP port 18999. A remote attacker can send specially crafted packets, trigger buffer overflow, cause the service to crash and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation
Update to versions 16.8(0.29), 16.7(0.181), 16.6.2, 16.6(1.93), 16.5(1.321), 16.3.5a, 16.3(5.1), 15.7(3.1.14A)OT, 15.7(3.1.9W)OT, 15.7(3.0u)M, 15.7(3)M1, 15.7(2.0v)M0.6, 15.6(3)M4, 15.6(3)M3.1, 15.6(2.13)SP3, 15.6(2)SP4, 15.5(3)S6.21 or 15.5(3)M7.

Vulnerable software versions

Cisco IOS XE: 16.5.1

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

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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.