CVE-2021-42911 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact Partial

This CVE is not in the KEV list.

The EPSS score is 0.03869.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

AND

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

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

Configuration 2 [-]

AND

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

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

Configuration 3 [-]

AND

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

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

No data.

No data.

Project Subscriptions

Vendors	Products
Draytek Subscribe	Vigor2960 Subscribe Vigor2960 Firmware Subscribe Vigor300b Subscribe Vigor300b Firmware Subscribe Vigor3900 Subscribe Vigor3900 Firmware Subscribe

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
https://gist.github.com/Cossack9989/e9c1c2d2e69b773ca4251acdd77f2835

History

No history.

Projects

Sign in to view the affected projects.

MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2022-03-29T19:30:16

Updated: 2024-08-04T03:47:12.398Z

Reserved: 2021-10-25T00:00:00

Link: CVE-2021-42911

Vulnrichment

No data.

NVD

Status : Modified

Published: 2022-03-29T20:15:07.690

Modified: 2024-11-21T06:28:17.733

Link: CVE-2021-42911

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-134

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "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."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2022-03-29T19:30:16", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://gist.github.com/Cossack9989/e9c1c2d2e69b773ca4251acdd77f2835"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2021-42911", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "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."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://gist.github.com/Cossack9989/e9c1c2d2e69b773ca4251acdd77f2835", "refsource": "MISC", "url": "https://gist.github.com/Cossack9989/e9c1c2d2e69b773ca4251acdd77f2835"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T03:47:12.398Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://gist.github.com/Cossack9989/e9c1c2d2e69b773ca4251acdd77f2835"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2021-42911", "datePublished": "2022-03-29T19:30:16", "dateReserved": "2021-10-25T00:00:00", "dateUpdated": "2024-08-04T03:47:12.398Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:draytek:vigor2960_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "9BCD9E78-DD12-42C5-99FA-D57C81D74C87", "versionEndIncluding": "1.5.1.3", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:draytek:vigor2960:-:*:*:*:*:*:*:*", "matchCriteriaId": "8FDA3905-67DD-4F31-AFCF-014F1D7CCC1F", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:draytek:vigor3900_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "51AB880F-1468-4105-ABAC-2E01653C0801", "versionEndIncluding": "1.5.1.3", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:draytek:vigor3900:-:*:*:*:*:*:*:*", "matchCriteriaId": "FEECFBBC-5551-4135-9194-4216A39B04B9", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:draytek:vigor300b_firmware:*:*:*:*:*:*:*:*", "matchCriteriaId": "08DBBB7D-FB59-4435-B388-D6F6D3BBA73C", "versionEndIncluding": "1.5.1.3", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:draytek:vigor300b:-:*:*:*:*:*:*:*", "matchCriteriaId": "DA5B988D-ED1A-4CBF-8B34-C5B03A55ED52", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "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"}], "id": "CVE-2021-42911", "lastModified": "2024-11-21T06:28:17.733", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 7.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2022-03-29T20:15:07.690", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://gist.github.com/Cossack9989/e9c1c2d2e69b773ca4251acdd77f2835"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://gist.github.com/Cossack9989/e9c1c2d2e69b773ca4251acdd77f2835"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-134"}], "source": "nvd@nist.gov", "type": "Primary"}]}