Cisco IOS XE CLI os command injection

Summaryinfo

A vulnerability described as critical has been identified in Cisco IOS XE. Affected by this issue is some unknown functionality of the component CLI. Executing a manipulation can lead to os command injection. This vulnerability is handled as CVE-2020-3403. It is possible to launch the attack on the local host. There is not any exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as critical was found in Cisco IOS XE (Router Operating System) (unknown version). This vulnerability affects an unknown code block of the component CLI. The manipulation with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

A vulnerability in the CLI of Cisco IOS XE Software could allow an authenticated, local attacker to inject a command to the underlying operating system that will execute with root privileges upon the next reboot of the device. The authenticated user must have privileged EXEC permissions on the device. The vulnerability is due to insufficient protection of values passed to a script that executes during device startup. An attacker could exploit this vulnerability by writing values to a specific file. A successful exploit could allow the attacker to execute commands with root privileges each time the affected device is restarted.

The weakness was released 09/24/2020 as cisco-sa-iosxe-cmdinj-2MzhjM6K as confirmed advisory (Website). The advisory is available at tools.cisco.com. This vulnerability was named CVE-2020-3403 since 12/12/2019. Local access is required to approach this attack. The requirement for exploitation is a single authentication. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/25/2020). This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

Upgrading eliminates this vulnerability.

Entries connected to this vulnerability are available at VDB-161868, VDB-161867, VDB-161865 and VDB-161864. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• IOS XE

License

• commercial

Website

• Vendor: https://www.cisco.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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