CVE-2019-17147

This vulnerability allows remote attackers to execute arbitrary code on affected installations of TP-LINK TL-WR841N routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the web service, which listens on TCP port 80 by default. When parsing the Host request header, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length static buffer. An attacker can leverage this vulnerability to execute code in the context of the admin user. Was ZDI-CAN-8457.

CVSS v3 8.8 HIGH
CVSS v2.0 9.3 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

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://www.tp-link.com/us/support/download/tl-wr841n/#Firmware	Product
https://www.zerodayinitiative.com/advisories/ZDI-19-992/	Third Party Advisory VDB Entry
https://www.tp-link.com/us/support/download/tl-wr841n/#Firmware	Product
https://www.zerodayinitiative.com/advisories/ZDI-19-992/	Third Party Advisory VDB Entry

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:tp-link:tl-wr841n_firmware:0.9.1_4.16:*:*:*:*:*:*:*

cpe:2.3:h:tp-link:tl-wr841n:-:*:*:*:*:*:*:*

History

21 Nov 2024, 04:31

Type	Values Removed	Values Added
References	~~() https://www.tp-link.com/us/support/download/tl-wr841n/#Firmware - Product~~	() https://www.tp-link.com/us/support/download/tl-wr841n/#Firmware - Product
References	~~() https://www.zerodayinitiative.com/advisories/ZDI-19-992/ - Third Party Advisory, VDB Entry~~	() https://www.zerodayinitiative.com/advisories/ZDI-19-992/ - Third Party Advisory, VDB Entry

Information

Published : 2020-01-07 23:15

Updated : 2024-11-21 04:31

NVD link : CVE-2019-17147

Mitre link : CVE-2019-17147

CVE.ORG link : CVE-2019-17147

JSON object : View

Products Affected

tp-link

tl-wr841n
tl-wr841n_firmware

CWE

CWE-120

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

{"id": "CVE-2019-17147", "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": "Secondary", "source": "zdi-disclosures@trendmicro.com", "cvssData": {"scope": "UNCHANGED", "version": "3.0", "baseScore": 8.8, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/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": "2020-01-07T23:15:10.967", "references": [{"url": "https://www.tp-link.com/us/support/download/tl-wr841n/#Firmware", "tags": ["Product"], "source": "zdi-disclosures@trendmicro.com"}, {"url": "https://www.zerodayinitiative.com/advisories/ZDI-19-992/", "tags": ["Third Party Advisory", "VDB Entry"], "source": "zdi-disclosures@trendmicro.com"}, {"url": "https://www.tp-link.com/us/support/download/tl-wr841n/#Firmware", "tags": ["Product"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.zerodayinitiative.com/advisories/ZDI-19-992/", "tags": ["Third Party Advisory", "VDB Entry"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "zdi-disclosures@trendmicro.com", "description": [{"lang": "en", "value": "CWE-120"}]}, {"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-120"}]}], "descriptions": [{"lang": "en", "value": "This vulnerability allows remote attackers to execute arbitrary code on affected installations of TP-LINK TL-WR841N routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the web service, which listens on TCP port 80 by default. When parsing the Host request header, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length static buffer. An attacker can leverage this vulnerability to execute code in the context of the admin user. Was ZDI-CAN-8457."}, {"lang": "es", "value": "Esta vulnerabilidad permite a atacantes remotos ejecutar c\u00f3digo arbitrario en las instalaciones afectadas de los routers TP-LINK TL-WR841N. No es requerida una autenticaci\u00f3n para explotar esta vulnerabilidad. El fallo espec\u00edfico ocurre dentro del servicio web, que escucha sobre el puerto TCP 80 por defecto. Cuando se analiza el encabezado de petici\u00f3n Host, el proceso no comprueba apropiadamente la longitud de los datos suministrados por el usuario antes de copiarlos en un b\u00fafer est\u00e1tico de longitud fija. Un atacante puede aprovechar esta vulnerabilidad para ejecutar c\u00f3digo en el contexto del usuario administrador. Fue ZDI-CAN-8457."}], "lastModified": "2024-11-21T04:31:47.390", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:tp-link:tl-wr841n_firmware:0.9.1_4.16:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DFC9F2FC-5E8B-4EE2-9B51-5F6A061E72B1"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:tp-link:tl-wr841n:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "AD44582F-0CC5-4A71-8FE8-2BEF65EB717E"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "zdi-disclosures@trendmicro.com"}