CVE-2021-42911

A Format String vulnerability exists in DrayTek Vigor 2960 <= 1.5.1.3, DrayTek Vigor 3900 <= 1.5.1.3, and DrayTek Vigor 300B <= 1.5.1.3 in the mainfunction.cgi file via a crafted HTTP message containing malformed QUERY STRING, which could let a remote malicious user execute arbitrary code.

CVSS v3 9.8 CRITICAL
CVSS v2.0 7.5 HIGH

9.8^/10

CVSS v3 : CRITICAL

Vector :

Exploitability : 3.9 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

7.5^/10

CVSS v2.0 : HIGH

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

Exploitability : 10.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication NONE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://gist.github.com/Cossack9989/e9c1c2d2e69b773ca4251acdd77f2835	Exploit Third Party Advisory
https://gist.github.com/Cossack9989/e9c1c2d2e69b773ca4251acdd77f2835	Exploit Third Party Advisory

Configurations

Configuration 1 (hide)

AND

cpe:2.3:o:draytek:vigor2960_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:draytek:vigor2960:-:*:*:*:*:*:*:*

Configuration 2 (hide)

AND

cpe:2.3:o:draytek:vigor3900_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:draytek:vigor3900:-:*:*:*:*:*:*:*

Configuration 3 (hide)

AND

cpe:2.3:o:draytek:vigor300b_firmware:*:*:*:*:*:*:*:*

cpe:2.3:h:draytek:vigor300b:-:*:*:*:*:*:*:*

History

21 Nov 2024, 06:28

Type	Values Removed	Values Added
References	~~() https://gist.github.com/Cossack9989/e9c1c2d2e69b773ca4251acdd77f2835 - Exploit, Third Party Advisory~~	() https://gist.github.com/Cossack9989/e9c1c2d2e69b773ca4251acdd77f2835 - Exploit, Third Party Advisory

Information

Published : 2022-03-29 20:15

Updated : 2024-11-21 06:28

NVD link : CVE-2021-42911

Mitre link : CVE-2021-42911

CVE.ORG link : CVE-2021-42911

JSON object : View

Products Affected

draytek

vigor3900_firmware
vigor3900
vigor300b_firmware
vigor2960
vigor2960_firmware
vigor300b

CWE

CWE-134

Use of Externally-Controlled Format String

{"id": "CVE-2021-42911", "metrics": {"cvssMetricV2": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"version": "2.0", "baseScore": 7.5, "accessVector": "NETWORK", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "authentication": "NONE", "integrityImpact": "PARTIAL", "accessComplexity": "LOW", "availabilityImpact": "PARTIAL", "confidentialityImpact": "PARTIAL"}, "acInsufInfo": false, "impactScore": 6.4, "baseSeverity": "HIGH", "obtainAllPrivilege": false, "exploitabilityScore": 10.0, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 9.8, "attackVector": "NETWORK", "baseSeverity": "CRITICAL", "vectorString": "CVSS:3.1/AV:N/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": 3.9}]}, "published": "2022-03-29T20:15:07.690", "references": [{"url": "https://gist.github.com/Cossack9989/e9c1c2d2e69b773ca4251acdd77f2835", "tags": ["Exploit", "Third Party Advisory"], "source": "cve@mitre.org"}, {"url": "https://gist.github.com/Cossack9989/e9c1c2d2e69b773ca4251acdd77f2835", "tags": ["Exploit", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-134"}]}], "descriptions": [{"lang": "en", "value": "A Format String vulnerability exists in DrayTek Vigor 2960 <= 1.5.1.3, DrayTek Vigor 3900 <= 1.5.1.3, and DrayTek Vigor 300B <= 1.5.1.3 in the mainfunction.cgi file via a crafted HTTP message containing malformed QUERY STRING, which could let a remote malicious user execute arbitrary code."}, {"lang": "es", "value": "Se presenta una vulnerabilidad de cadena de formato en DrayTek Vigor 2960 versiones anteriores a 1.5.1.3 incluy\u00e9ndola, DrayTek Vigor 3900 versiones anteriores a 1.5.1.3 incluy\u00e9ndola, y DrayTek Vigor 300B versiones anteriores a 1.5.1.3 incluy\u00e9ndola, en el archivo mainfunction.cgi por medio de un mensaje HTTP dise\u00f1ado que contiene una cadena de consulta malformada, lo que podr\u00eda permitir a un usuario remoto malicioso ejecutar c\u00f3digo arbitrario"}], "lastModified": "2024-11-21T06:28:17.733", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:draytek:vigor2960_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9BCD9E78-DD12-42C5-99FA-D57C81D74C87", "versionEndIncluding": "1.5.1.3"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:draytek:vigor2960:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "8FDA3905-67DD-4F31-AFCF-014F1D7CCC1F"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:draytek:vigor3900_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "51AB880F-1468-4105-ABAC-2E01653C0801", "versionEndIncluding": "1.5.1.3"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:draytek:vigor3900:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "FEECFBBC-5551-4135-9194-4216A39B04B9"}], "operator": "OR"}], "operator": "AND"}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:draytek:vigor300b_firmware:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "08DBBB7D-FB59-4435-B388-D6F6D3BBA73C", "versionEndIncluding": "1.5.1.3"}], "operator": "OR"}, {"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:h:draytek:vigor300b:-:*:*:*:*:*:*:*", "vulnerable": false, "matchCriteriaId": "DA5B988D-ED1A-4CBF-8B34-C5B03A55ED52"}], "operator": "OR"}], "operator": "AND"}], "sourceIdentifier": "cve@mitre.org"}