Vulnerability identifier: #VU28762

Vulnerability risk: Low

CVSSv3.1: 6.3 [CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-3218

CWE-ID: CWE-20

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 user to execute arbitrary code on the system.

The vulnerability exists due to insufficient validation of user-supplied input in the web UI. A remote administrator can first create a malicious file on the affected device itself, then upload a second malicious file to the device and execute arbitrary code on the target system.

This vulnerability affects the following products if they are running affected release of Cisco IOS XE Software: 

• Cisco Catalyst 3850 Series Switches
• Cisco Catalyst 3650 Series Switches
• Cisco Catalyst 9300 Series Switches
• Cisco Catalyst 9500 Series Switches
• Cisco Catalyst 9200 Series Switches

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Cisco IOS XE: 17.1.1

---

External links
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-webui-rce-uk8BXcUD

---

Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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