CVE-2018-17208

Linksys Velop 1.1.2.187020 devices allow unauthenticated command injection, providing an attacker with full root access, via cgi-bin/zbtest.cgi or cgi-bin/zbtest2.cgi (scripts that can be discovered with binwalk on the firmware, but are not visible in the web interface). This occurs because shell metacharacters in the query string are mishandled by ShellExecute, as demonstrated by the zbtest.cgi?cmd=level&level= substring. This can also be exploited via CSRF.

CVSS v3 8.8 HIGH
CVSS v2.0 9.3 HIGH

8.8^/10

CVSS v3 : HIGH

Vector : AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

9.3^/10

CVSS v2.0 : HIGH

Vector : AV:N/AC:M/Au:N/C:C/I:C/A:C

Exploitability : 8.6 / Impact : 10.0

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact COMPLETE

Integrity Impact COMPLETE

Availability Impact COMPLETE

References

Link	Resource
https://langkjaer.com/velop.html	Exploit Technical Description Third Party Advisory
https://langkjaer.com/velop.html	Exploit Technical Description Third Party Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:linksys:velop_firmware:1.1.2.187020:*:*:*:*:*:*:*

cpe:2.3:h:linksys:velop:-:*:*:*:*:*:*:*

History

21 Nov 2024, 03:54

Type	Values Removed	Values Added
References	~~() https://langkjaer.com/velop.html - Exploit, Technical Description, Third Party Advisory~~	() https://langkjaer.com/velop.html - Exploit, Technical Description, Third Party Advisory

Information

Published : 2018-09-19 17:29

Updated : 2024-11-21 03:54

NVD link : CVE-2018-17208

Mitre link : CVE-2018-17208

CVE.ORG link : CVE-2018-17208

JSON object : View

Products Affected

linksys

velop
velop_firmware

CWE

CWE-78

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

{"id": "CVE-2018-17208", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 9.3, "accessVector": "NETWORK", "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "authentication": "NONE", "integrityImpact": "COMPLETE", "accessComplexity": "MEDIUM", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "acInsufInfo": false, "impactScore": 10.0, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 8.6, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true}], "cvssMetricV30": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "published": "2018-09-19T17:29:00.257", "references": [{"url": "https://langkjaer.com/velop.html", "tags": ["Exploit", "Technical Description", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://langkjaer.com/velop.html", "tags": ["Exploit", "Technical Description", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-78"}]}], "descriptions": [{"lang": "en", "value": "Linksys Velop 1.1.2.187020 devices allow unauthenticated command injection, providing an attacker with full root access, via cgi-bin/zbtest.cgi or cgi-bin/zbtest2.cgi (scripts that can be discovered with binwalk on the firmware, but are not visible in the web interface). This occurs because shell metacharacters in the query string are mishandled by ShellExecute, as demonstrated by the zbtest.cgi?cmd=level&level= substring. This can also be exploited via CSRF."}, {"lang": "es", "value": "Los dispositivos de Linksys Velop 1.1.2.187020 permite la inyecci\u00f3n de comandos no autenticada, proporcionando a un atacante con acceso root total mediante cgi-bin/zbtest.cgi o cgi-bin/zbtest2.cgi (scripts que se pueden descubrir con binwalk en el firmware, pero no son visibles en la interfaz web). Esto ocurre porque los metacaracteres shell en la cadena de consulta se gestionan de manera incorrecta por ShellExecute, tal y como queda demostrado con la subcadena zbtest.cgi?cmd=levellevel=. Esto tambi\u00e9n se puede explotar mediante Cross-Site Request Forgery (CSRF)."}], "lastModified": "2024-11-21T03:54:05.980", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linksys:velop_firmware:1.1.2.187020:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9A9C279E-F31A-42F4-989A-F5EF9D3384D3"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:linksys:velop:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "864C4FC6-B81E-40A1-A5C3-2BAC9A8F2C06"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "cve@mitre.org"}