Cisco NX-OS CLI Argument input validation

Summaryinfo

A vulnerability was found in Cisco NX-OS. It has been rated as problematic. This vulnerability affects unknown code of the component CLI. This manipulation as part of Argument causes input validation. The identification of this vulnerability is CVE-2018-0307. The attack can only be executed locally. There is no exploit available.

Detailsinfo

A vulnerability has been found in Cisco NX-OS (Router Operating System) (version unknown) and classified as problematic. Affected by this vulnerability is an unknown function of the component CLI. The manipulation as part of a Argument 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. The summary by CVE is:

A vulnerability in the CLI of Cisco NX-OS Software could allow an authenticated, local attacker to perform a command-injection attack on an affected device. The vulnerability is due to insufficient input validation of command arguments. An attacker could exploit this vulnerability by injecting malicious command arguments into a vulnerable CLI command. A successful exploit could allow the attacker, authenticated as a privileged user, to execute arbitrary commands with root privileges. Note: On products that support multiple virtual device contexts (VDC), this vulnerability could allow an attacker to access files from any VDC. This vulnerability affects Nexus 2000 Series Fabric Extenders, Nexus 3000 Series Switches, Nexus 3500 Platform Switches, Nexus 3600 Platform Switches, Nexus 5500 Platform Switches, Nexus 5600 Platform Switches, Nexus 6000 Series Switches, Nexus 7000 Series Switches, Nexus 7700 Series Switches, Nexus 9000 Series Switches in standalone NX-OS mode, Nexus 9500 R-Series Line Cards and Fabric Modules. Cisco Bug IDs: CSCve51704, CSCve91749, CSCve91768.

The bug was discovered 06/20/2018. The weakness was shared 06/20/2018 as cisco-sa-20180620-nx-os-cli-in / CSCve91768 as confirmed advisory (Website). The advisory is shared at tools.cisco.com. This vulnerability is known as CVE-2018-0307 since 11/27/2017. An attack has to be approached locally. The successful exploitation requires a single authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 03/28/2023).

The commercial vulnerability scanner Qualys is able to test this issue with plugin 316278 (Cisco NX-OS Software CLI Arbitrary Command Injection Vulnerability(cisco-sa-20180620-nx-os-cli-injection)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entries VDB-119753, VDB-119752, VDB-119747 and VDB-119746 are related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• NX-OS

License

• commercial

Website

• Vendor: https://www.cisco.com/

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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