Cisco IOS XR Command Line line os command injection

EntryeditHistoryDiffjsonxmlCTI
CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.5$5k-$25k0.00

A vulnerability classified as critical was found in Cisco IOS XR (Router Operating System) (affected version unknown). Affected by this vulnerability is some unknown processing of the component Command Line Handler. The manipulation of the argument line with an unknown input leads to a privilege escalation vulnerability. The CWE definition for the vulnerability is CWE-78. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A vulnerability in a CLI command of Cisco IOS XR Software for the Cisco 8000 Series Routers and Network Convergence System 540 Series Routers running NCS540L software images could allow an authenticated, local attacker to elevate their privilege to root. To exploit this vulnerability, an attacker would need to have a valid account on an affected device. The vulnerability is due to insufficient validation of command line arguments. An attacker could exploit this vulnerability by authenticating to the device and entering a crafted command at the prompt. A successful exploit could allow an attacker with low-level privileges to escalate their privilege level to root.

The weakness was presented 02/05/2021 as cisco-sa-iosxr-pe-QpzCAePe. The advisory is shared at tools.cisco.com. This vulnerability is known as CVE-2021-1370 since 11/13/2020. The exploitation appears to be easy. An attack has to be approached locally. Required for exploitation is a single authentication. Technical details are known, but no exploit is available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 02/24/2021).

Upgrading eliminates this vulnerability.

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VulDB Meta Base Score: 7.8
VulDB Meta Temp Score: 7.5

VulDB Base Score: 7.8
VulDB Temp Score: 7.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 7.8
NVD Vector: 🔒

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

NVD Base Score: 🔒

Exploitinginfoedit

Class: Privilege escalation
CWE: CWE-78
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

Threat: 🔍
Adversaries: 🔍
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Countermeasuresinfoedit

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: tools.cisco.com

Timelineinfoedit

11/13/2020 CVE assigned
02/05/2021 +84 days Advisory disclosed
02/05/2021 +0 days VulDB entry created
02/24/2021 +19 days VulDB last update

Sourcesinfoedit

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

Advisory: cisco-sa-iosxr-pe-QpzCAePe
Status: Confirmed

CVE: CVE-2021-1370 (🔒)
scip Labs: https://www.scip.ch/en/?labs.20150108

Entryinfoedit

Created: 02/05/2021 10:34 AM
Updated: 02/24/2021 03:57 PM
Changes: (17) vulnerability_cvss3_nvd_av vulnerability_cvss3_nvd_ac vulnerability_cvss3_nvd_pr vulnerability_cvss3_nvd_ui vulnerability_cvss3_nvd_s vulnerability_cvss3_nvd_c vulnerability_cvss3_nvd_i vulnerability_cvss3_nvd_a vulnerability_cvss2_nvd_av vulnerability_cvss2_nvd_ac vulnerability_cvss2_nvd_au vulnerability_cvss2_nvd_ci vulnerability_cvss2_nvd_ii vulnerability_cvss2_nvd_ai source_cve_cna vulnerability_cvss2_nvd_basescore vulnerability_cvss3_nvd_basescore
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