CVE-2020-7777

This affects all versions of package jsen. If an attacker can control the schema file, it could run arbitrary JavaScript code on the victim machine. In the module description and README file there is no mention about the risks of untrusted schema files, so I assume that this is applicable. In particular the required field of the schema is not properly sanitized. The resulting string that is build based on the schema definition is then passed to a Function.apply();, leading to an Arbitrary Code Execution.

CVSS v3 7.2 HIGH
CVSS v2.0 6.5 MEDIUM

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

6.5^/10

CVSS v2.0 : MEDIUM

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

Exploitability : 8.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/bugventure/jsen/blob/master/lib/jsen.js%23L875	Broken Link
https://snyk.io/vuln/SNYK-JS-JSEN-1014670	Exploit Third Party Advisory
https://github.com/bugventure/jsen/blob/master/lib/jsen.js%23L875	Broken Link
https://snyk.io/vuln/SNYK-JS-JSEN-1014670	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:jsen_project:jsen:*:*:*:*:*:node.js:*:*

History

21 Nov 2024, 05:37

Type	Values Removed	Values Added
References	~~() https://github.com/bugventure/jsen/blob/master/lib/jsen.js%23L875 - Broken Link~~	() https://github.com/bugventure/jsen/blob/master/lib/jsen.js%23L875 - Broken Link
References	~~() https://snyk.io/vuln/SNYK-JS-JSEN-1014670 - Exploit, Third Party Advisory~~	() https://snyk.io/vuln/SNYK-JS-JSEN-1014670 - Exploit, Third Party Advisory

Information

Published : 2020-11-23 16:15

Updated : 2024-11-21 05:37

NVD link : CVE-2020-7777

Mitre link : CVE-2020-7777

CVE.ORG link : CVE-2020-7777

JSON object : View

Products Affected

jsen_project

jsen

CWE

NVD-CWE-noinfo

{"id": "CVE-2020-7777", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 6.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:P", "authentication": "SINGLE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "MEDIUM", "obtainAllPrivilege": false, "exploitabilityScore": 8.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Secondary", "source": "report@snyk.io", "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}]}, "published": "2020-11-23T16:15:13.603", "references": [{"url": "https://github.com/bugventure/jsen/blob/master/lib/jsen.js%23L875", "tags": ["Broken Link"], "source": "report@snyk.io"}, {"url": "https://snyk.io/vuln/SNYK-JS-JSEN-1014670", "tags": ["Exploit", "Third Party Advisory"], "source": "report@snyk.io"}, {"url": "https://github.com/bugventure/jsen/blob/master/lib/jsen.js%23L875", "tags": ["Broken Link"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://snyk.io/vuln/SNYK-JS-JSEN-1014670", "tags": ["Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "This affects all versions of package jsen. If an attacker can control the schema file, it could run arbitrary JavaScript code on the victim machine. In the module description and README file there is no mention about the risks of untrusted schema files, so I assume that this is applicable. In particular the required field of the schema is not properly sanitized. The resulting string that is build based on the schema definition is then passed to a Function.apply();, leading to an Arbitrary Code Execution."}, {"lang": "es", "value": "Esto afecta a todas las versiones del paquete jsen. Si un atacante puede controlar el archivo de esquema, podr\u00eda ejecutar c\u00f3digo JavaScript arbitrario en la m\u00e1quina v\u00edctima. En la descripci\u00f3n del m\u00f3dulo y el archivo README no son mencionados los riesgos de los archivos de esquema que no son confiables, as\u00ed que supongo que esto es aplicable. En particular, el campo requerido del esquema no es saneado apropiadamente. La cadena resultante que es construida seg\u00fan la definici\u00f3n del esquema es pasada luego a una funci\u00f3n Function.apply();, conllevando a una Ejecuci\u00f3n de C\u00f3digo Arbitraria"}], "lastModified": "2024-11-21T05:37:47.073", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:jsen_project:jsen:*:*:*:*:*:node.js:*:*", "vulnerable": true, "matchCriteriaId": "513CE3A9-7F6B-4FDE-A248-7F160B474D48"}], "operator": "OR"}]}], "sourceIdentifier": "report@snyk.io"}