CVE-2021-40120

A vulnerability in the web-based management interface of certain Cisco Small Business RV Series Routers could allow an authenticated, remote attacker with administrative privileges to inject arbitrary commands into the underlying operating system and execute them using root-level privileges. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending malicious input to a specific field in the web-based management interface of an affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying Linux operating system as a user with root-level privileges.

CVSS v3 7.2 HIGH
CVSS v2.0 9.0 HIGH

7.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required HIGH

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

9.0^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:L/Au:S/C:C/I:C/A:C

Exploitability : 8.0 / Impact : 10.0

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sbrv-cmdinjection-Z5cWFdK	Vendor Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:cisco:ios_xr:4.2.3.06:*:*:*:*:*:*:*

OR	cpe:2.3:h:cisco:rv016:-:::::::*
	cpe:2.3:h:cisco:rv042:-:::::::*
	cpe:2.3:h:cisco:rv042g:-:::::::*
	cpe:2.3:h:cisco:rv082:-:::::::*
	cpe:2.3:h:cisco:rv320:-:::::::*
	cpe:2.3:h:cisco:rv325:-:::::::*

Configuration 2 (hide)

cpe:2.3:a:cisco:application_extension_platform:1.5.1.13:*:*:*:*:*:*:*

History

No history.

Information

Published : 2021-11-04 16:15

Updated : 2024-02-28 18:48

NVD link : CVE-2021-40120

Mitre link : CVE-2021-40120

CVE.ORG link : CVE-2021-40120

JSON object : View

Products Affected

cisco

rv042g
application_extension_platform
rv042
ios_xr
rv325
rv016
rv082
rv320

CWE

CWE-78

Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CWE-20

Improper Input Validation

{"id": "CVE-2021-40120", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 9.0, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C", "authentication": "SINGLE", "integrityImpact": "COMPLETE", "accessComplexity": "LOW", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "acInsufInfo": false, "impactScore": 10.0, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 8.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.2, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.2}, {"type": "Secondary", "source": "ykramarz@cisco.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.5, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.2, "exploitabilityScore": 1.2}]}, "published": "2021-11-04T16:15:09.430", "references": [{"url": "https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sbrv-cmdinjection-Z5cWFdK", "tags": ["Vendor Advisory"], "source": "ykramarz@cisco.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-78"}]}, {"type": "Secondary", "source": "ykramarz@cisco.com", "description": [{"lang": "en", "value": "CWE-20"}]}], "descriptions": [{"lang": "en", "value": "A vulnerability in the web-based management interface of certain Cisco Small Business RV Series Routers could allow an authenticated, remote attacker with administrative privileges to inject arbitrary commands into the underlying operating system and execute them using root-level privileges. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending malicious input to a specific field in the web-based management interface of an affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying Linux operating system as a user with root-level privileges."}, {"lang": "es", "value": "Una vulnerabilidad en la interfaz de administraci\u00f3n basada en la web de algunos routers de la serie RV de Cisco Small Business podr\u00eda permitir a un atacante remoto autenticado con privilegios administrativos inyectar comandos arbitrarios en el sistema operativo subyacente y ejecutarlos usando privilegios de nivel de root. Esta vulnerabilidad es debido a que no se comprueba suficientemente la entrada proporcionada por el usuario. Un atacante podr\u00eda explotar esta vulnerabilidad mediante el env\u00edo de una entrada maliciosa a un campo espec\u00edfico de la interfaz de administraci\u00f3n basada en la web de un dispositivo afectado. Una explotaci\u00f3n con \u00e9xito podr\u00eda permitir al atacante ejecutar comandos arbitrarios en el sistema operativo Linux subyacente como un usuario con privilegios de nivel de root"}], "lastModified": "2023-11-07T03:38:29.797", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:cisco:ios_xr:4.2.3.06:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4D9A5E39-C509-4C46-84C2-6EC81F87E920"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:cisco:rv016:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "701E3CF5-15C0-419A-97A8-9BD2C55D74AB"}, {"criteria": "cpe:2.3:h:cisco:rv042:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "2DCBB2D8-AACF-45EA-B9D4-DAECC7C792D1"}, {"criteria": "cpe:2.3:h:cisco:rv042g:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "F1CD7D9C-DDEF-4DF0-BCFB-A45301AE2C10"}, {"criteria": "cpe:2.3:h:cisco:rv082:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "24FC4446-22C0-4EC9-84B4-A76412680105"}, {"criteria": "cpe:2.3:h:cisco:rv320:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "7596F6D4-10DA-4F29-95AD-75B60F4670D6"}, {"criteria": "cpe:2.3:h:cisco:rv325:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "3435D601-EDA8-49FF-8841-EA6DF1518C75"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:cisco:application_extension_platform:1.5.1.13:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "31079AE3-0F4C-4DE1-BFD3-6694EFF54D70"}], "operator": "OR"}]}], "sourceIdentifier": "ykramarz@cisco.com"}