Vulnerability identifier: #VU11335

Vulnerability risk: Medium

CVSSv3.1: 7.4 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:H/RL:O/RC:C]

CVE-ID: CVE-2018-0161

CWE-ID: CWE-399

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 authenticated attacker to cause DoS condition on the target system. 

The weakness exists in the Simple Network Management Protocol (SNMP) subsystem due to a condition that could occur when processing an SNMP read request that contains a request for the ciscoFlashMIB object ID (OID). A remote attacker can issue an SNMP GET request for the ciscoFlashMIB OID and cause the service to crash due to a SYS-3-CPUHOG.

Mitigation
Update to versions 15.2(6.3.30i)E, 15.2(6.3.0i)E, 15.2(6.2.6i)E or 15.2(6)E.

Vulnerable software versions

Cisco IOS XE: 15.2.5 E

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

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.