CVE-2020-8289 - Vulnerability Details - OpenCVE

Backblaze for Windows before 7.0.1.433 and Backblaze for macOS before 7.0.1.434 suffer from improper certificate validation in `bztransmit` helper due to hardcoded whitelist of strings in URLs where validation is disabled leading to possible remote code execution via client update functionality.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction Required

No CVSS v3.0

Access Vector Network

Access Complexity Medium

Authentication None

Confidentiality Impact Complete

Integrity Impact Complete

Availability Impact Complete

This CVE is not in the KEV list.

The EPSS score is 0.20543.

Key SSVC decision points have not yet been added.

Vendors	Products
Backblaze	Backblaze

Configuration 1 [-]

OR	cpe:2.3:a:backblaze:backblaze::::::windows::*
	cpe:2.3:a:backblaze:backblaze::::::macos::*

No data.

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References

Link	Providers
http://seclists.org/fulldisclosure/2020/Dec/57
http://seclists.org/fulldisclosure/2020/Dec/58
https://github.com/geffner/CVE-2020-8289/blob/master/README.md
https://hackerone.com/reports/818853
https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/
https://youtu.be/W0THXbcX5V8

History

No history.

MITRE

Status: PUBLISHED

Assigner: hackerone

Published: 2020-12-27T01:20:50

Updated: 2024-08-04T09:56:28.315Z

Reserved: 2020-01-28T00:00:00

Link: CVE-2020-8289

Vulnrichment

No data.

NVD

Status : Modified

Published: 2020-12-27T02:15:14.480

Modified: 2024-11-21T05:38:40.090

Link: CVE-2020-8289

Redhat

No data.

OpenCVE Enrichment

No data.

{"containers": {"cna": {"affected": [{"product": "Backblaze", "vendor": "n/a", "versions": [{"status": "affected", "version": "Backblaze for Windows before 7.0.1.433 and Backblaze for macOS before 7.0.1.434"}]}], "descriptions": [{"lang": "en", "value": "Backblaze for Windows before 7.0.1.433 and Backblaze for macOS before 7.0.1.434 suffer from improper certificate validation in `bztransmit` helper due to hardcoded whitelist of strings in URLs where validation is disabled leading to possible remote code execution via client update functionality."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-295", "description": "Improper Certificate Validation (CWE-295)", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2020-12-29T10:06:13", "orgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1", "shortName": "hackerone"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://hackerone.com/reports/818853"}, {"tags": ["x_refsource_MISC"], "url": "https://youtu.be/W0THXbcX5V8"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/geffner/CVE-2020-8289/blob/master/README.md"}, {"tags": ["x_refsource_MISC"], "url": "https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/"}, {"name": "20201229 Re: [FD] CVE-2020-8150 - Remote Code Execution as SYSTEM/root via Backblaze", "tags": ["mailing-list", "x_refsource_FULLDISC"], "url": "http://seclists.org/fulldisclosure/2020/Dec/57"}, {"name": "20201229 Re: CVE-2020-8150 - Remote Code Execution as SYSTEM/root via Backblaze", "tags": ["mailing-list", "x_refsource_FULLDISC"], "url": "http://seclists.org/fulldisclosure/2020/Dec/58"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "support@hackerone.com", "ID": "CVE-2020-8289", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Backblaze", "version": {"version_data": [{"version_value": "Backblaze for Windows before 7.0.1.433 and Backblaze for macOS before 7.0.1.434"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Backblaze for Windows before 7.0.1.433 and Backblaze for macOS before 7.0.1.434 suffer from improper certificate validation in `bztransmit` helper due to hardcoded whitelist of strings in URLs where validation is disabled leading to possible remote code execution via client update functionality."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "Improper Certificate Validation (CWE-295)"}]}]}, "references": {"reference_data": [{"name": "https://hackerone.com/reports/818853", "refsource": "MISC", "url": "https://hackerone.com/reports/818853"}, {"name": "https://youtu.be/W0THXbcX5V8", "refsource": "MISC", "url": "https://youtu.be/W0THXbcX5V8"}, {"name": "https://github.com/geffner/CVE-2020-8289/blob/master/README.md", "refsource": "MISC", "url": "https://github.com/geffner/CVE-2020-8289/blob/master/README.md"}, {"name": "https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/", "refsource": "MISC", "url": "https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/"}, {"name": "20201229 Re: [FD] CVE-2020-8150 - Remote Code Execution as SYSTEM/root via Backblaze", "refsource": "FULLDISC", "url": "http://seclists.org/fulldisclosure/2020/Dec/57"}, {"name": "20201229 Re: CVE-2020-8150 - Remote Code Execution as SYSTEM/root via Backblaze", "refsource": "FULLDISC", "url": "http://seclists.org/fulldisclosure/2020/Dec/58"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T09:56:28.315Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://hackerone.com/reports/818853"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://youtu.be/W0THXbcX5V8"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/geffner/CVE-2020-8289/blob/master/README.md"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/"}, {"name": "20201229 Re: [FD] CVE-2020-8150 - Remote Code Execution as SYSTEM/root via Backblaze", "tags": ["mailing-list", "x_refsource_FULLDISC", "x_transferred"], "url": "http://seclists.org/fulldisclosure/2020/Dec/57"}, {"name": "20201229 Re: CVE-2020-8150 - Remote Code Execution as SYSTEM/root via Backblaze", "tags": ["mailing-list", "x_refsource_FULLDISC", "x_transferred"], "url": "http://seclists.org/fulldisclosure/2020/Dec/58"}]}]}, "cveMetadata": {"assignerOrgId": "36234546-b8fa-4601-9d6f-f4e334aa8ea1", "assignerShortName": "hackerone", "cveId": "CVE-2020-8289", "datePublished": "2020-12-27T01:20:50", "dateReserved": "2020-01-28T00:00:00", "dateUpdated": "2024-08-04T09:56:28.315Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:backblaze:backblaze:*:*:*:*:*:windows:*:*", "matchCriteriaId": "23E8143D-EC22-4EEB-8C12-FA4D929F0ADB", "versionEndExcluding": "7.0.1.433", "vulnerable": true}, {"criteria": "cpe:2.3:a:backblaze:backblaze:*:*:*:*:*:macos:*:*", "matchCriteriaId": "ADD57DC1-0797-4367-A9AF-BBAC83BFD046", "versionEndExcluding": "7.0.1.434", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "Backblaze for Windows before 7.0.1.433 and Backblaze for macOS before 7.0.1.434 suffer from improper certificate validation in `bztransmit` helper due to hardcoded whitelist of strings in URLs where validation is disabled leading to possible remote code execution via client update functionality."}, {"lang": "es", "value": "Backblaze para Windows versiones anteriores a 7.0.1.433 y Backblaze para macOS versiones anteriores a 7.0.1.434, sufren de una validaci\u00f3n de certificado incorrecta en el asistente \"bztransmit\" debido a una lista blanca embebida de cadenas en URL donde la comprobaci\u00f3n est\u00e1 deshabilitada, lo que lleva a una posible ejecuci\u00f3n de c\u00f3digo remota por medio de la funcionalidad de actualizaci\u00f3n del cliente"}], "id": "CVE-2020-8289", "lastModified": "2024-11-21T05:38:40.090", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 9.3, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:N/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-12-27T02:15:14.480", "references": [{"source": "support@hackerone.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://seclists.org/fulldisclosure/2020/Dec/57"}, {"source": "support@hackerone.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://seclists.org/fulldisclosure/2020/Dec/58"}, {"source": "support@hackerone.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/geffner/CVE-2020-8289/blob/master/README.md"}, {"source": "support@hackerone.com", "tags": ["Permissions Required"], "url": "https://hackerone.com/reports/818853"}, {"source": "support@hackerone.com", "tags": ["Third Party Advisory"], "url": "https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/"}, {"source": "support@hackerone.com", "tags": ["Exploit", "Third Party Advisory"], "url": "https://youtu.be/W0THXbcX5V8"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://seclists.org/fulldisclosure/2020/Dec/57"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://seclists.org/fulldisclosure/2020/Dec/58"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://github.com/geffner/CVE-2020-8289/blob/master/README.md"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Permissions Required"], "url": "https://hackerone.com/reports/818853"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://youtu.be/W0THXbcX5V8"}], "sourceIdentifier": "support@hackerone.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-295"}], "source": "support@hackerone.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-295"}], "source": "nvd@nist.gov", "type": "Primary"}]}