CVEvulnerability
CVE-2020-8289
7.8 HIGH
Official page ↗
- Status
- Modified
- Published
- 2020-12-27
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- CVSS 2.0 ([email protected])
- 9.3 HIGH — AV:N/AC:M/Au:N/C:C/I:C/A:C
- Weaknesses
- CWE-295
Description
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.
Affected configurations
• backblaze backblaze (< 7.0.1.433)
• backblaze backblaze (< 7.0.1.434)
Related
Weakness · CWE (1)
- CWE-295 Improper Certificate Validation weakness
References
- http://seclists.org/fulldisclosure/2020/Dec/57 Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2020/Dec/58 Mailing List, Third Party Advisory
- https://github.com/geffner/CVE-2020-8289/blob/master/README.md Exploit, Third Party Advisory
- https://hackerone.com/reports/818853 Permissions Required
- https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/ Third Party Advisory
- https://youtu.be/W0THXbcX5V8 Exploit, Third Party Advisory
- http://seclists.org/fulldisclosure/2020/Dec/57 Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2020/Dec/58 Mailing List, Third Party Advisory
- https://github.com/geffner/CVE-2020-8289/blob/master/README.md Exploit, Third Party Advisory
- https://hackerone.com/reports/818853 Permissions Required
- https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/ Third Party Advisory
- https://youtu.be/W0THXbcX5V8 Exploit, Third Party Advisory