Cisco IOS XR CLI argument injection

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CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.84

A vulnerability was found in Cisco IOS XR (Router Operating System) (affected version not known). It has been rated as critical. Affected by this issue is an unknown code block of the component CLI. The manipulation with an unknown input leads to a privilege escalation vulnerability. Using CWE to declare the problem leads to CWE-88. Impacted is confidentiality, integrity, and availability. CVE summarizes:

A vulnerability in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to inject arbitrary commands that are executed with root privileges on the underlying Linux operating system (OS) of an affected device. This vulnerability is due to insufficient input validation of commands that are supplied by the user. An attacker could exploit this vulnerability by authenticating to a device and submitting crafted input to an affected command. A successful exploit could allow the attacker to execute commands on the underlying Linux OS with root privileges.

The weakness was released 04/08/2021 as cisco-sa-xr-cmdinj-vsKGherc. The advisory is available at tools.cisco.com. This vulnerability is handled as CVE-2021-1485 since 11/13/2020. The exploitation is known to be easy. Local access is required to approach this attack. The requirement for exploitation is a simple 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 04/11/2021).

Upgrading eliminates this vulnerability.

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CVSSv3infoedit

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-88
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
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Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfoedit

11/13/2020 CVE assigned
04/08/2021 +145 days Advisory disclosed
04/08/2021 +0 days VulDB entry created
04/11/2021 +3 days VulDB last update

Sourcesinfoedit

Vendor: https://www.cisco.com/

Advisory: cisco-sa-xr-cmdinj-vsKGherc
Status: Confirmed

CVE: CVE-2021-1485 (🔒)
scip Labs: https://www.scip.ch/en/?labs.20150108

Entryinfoedit

Created: 04/08/2021 11:06 AM
Updated: 04/11/2021 09:53 PM
Changes: (1) source_cve_cna
Complete: 🔍

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