A vulnerability was found in Cisco Small Business 220 up to 1.1.4.3. It has been rated as critical. Affected by this issue is an unknown code of the component Web Management Interface. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A vulnerability in the web management interface of Cisco Small Business 220 Series Smart Switches could allow an authenticated, remote attacker to perform a command injection attack. The vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a malicious request to certain parts of the web management interface. To send the malicious request, the attacker needs a valid login session in the web management interface as a privilege level 15 user. Depending on the configuration of the affected switch, the malicious request must be sent via HTTP or HTTPS. A successful exploit could allow the attacker to execute arbitrary shell commands with the privileges of the root user.

The weakness was presented 08/07/2019 as cisco-sa-20190806-sb220-inject as confirmed advisory (Website). The advisory is available at tools.cisco.com. This vulnerability is handled as CVE-2019-1914 since 12/06/2018. The attack may be launched remotely. A simple authentication is needed for exploitation. Technical details are unknown but a public exploit is available. The advisory points out:

A vulnerability in the web management interface of Cisco Small Business 220 Series Smart Switches could allow an authenticated, remote attacker to perform a command injection attack.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k. The advisory illustrates:

The vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending a malicious request to certain parts of the web management interface. To send the malicious request, the attacker needs a valid login session in the web management interface as a privilege level 15 user. Depending on the configuration of the affected switch, the malicious request must be sent via HTTP or HTTPS. A successful exploit could allow the attacker to execute arbitrary shell commands with the privileges of the root user.

Upgrading to version 1.1.4.4 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Exploit-DB (47442). zdnet.com is providing further details. See VDB-139596 and VDB-139597 for similar entries. If you want to get best quality of vulnerability data, you may have to visit VulDB.

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Vendor

• Cisco

Name

• Small Business 220

Version

• 1.1.4.0
• 1.1.4.1
• 1.1.4.2
• 1.1.4.3

License

• commercial

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• 🔍
• 🔍
• 🔍

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• 🔍
• 🔍
• 🔍

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