Cisco NX-OS Call Home Parameter input validation

Summaryinfo

A vulnerability described as critical has been identified in Cisco NX-OS. Impacted is an unknown function of the component Call Home Handler. Executing a manipulation as part of Parameter can lead to input validation. This vulnerability is handled as CVE-2020-3454. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Cisco NX-OS (Router Operating System) (unknown version). It has been declared as critical. This vulnerability affects an unknown code block of the component Call Home Handler. The manipulation as part of a Parameter leads to a input validation vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A vulnerability in the Call Home feature of Cisco NX-OS Software could allow an authenticated, remote attacker to inject arbitrary commands that could be executed with root privileges on the underlying operating system (OS). The vulnerability is due to insufficient input validation of specific Call Home configuration parameters when the software is configured for transport method HTTP. An attacker could exploit this vulnerability by modifying parameters within the Call Home configuration on an affected device. A successful exploit could allow the attacker to execute arbitrary commands with root privileges on the underlying OS.

The weakness was released 08/27/2020 as cisco-sa-callhome-cmdinj-zkxzS as confirmed advisory (Website). The advisory is shared for download at tools.cisco.com. This vulnerability was named CVE-2020-3454 since 12/12/2019. The attack can be initiated remotely. The requirement for exploitation is a single authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 08/28/2020).

Upgrading eliminates this vulnerability.

Entries connected to this vulnerability are available at VDB-160395, VDB-160394 and VDB-160393. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• NX-OS

License

• commercial

Website

• Vendor: https://www.cisco.com/

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Once again VulDB remains the best source for vulnerability data.

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