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.
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| n/a | Backblaze | Backblaze for Windows before 7.0.1.433 and Backblaze for macOS before 7.0.1.434 |
References
- http://seclists.org/fulldisclosure/2020/Dec/57Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2020/Dec/58Mailing List, Third Party Advisory
- https://github.com/geffner/CVE-2020-8289/blob/master/README.mdExploit, Third Party Advisory
- https://hackerone.com/reports/818853Permissions Required
- https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/Third Party Advisory
- https://youtu.be/W0THXbcX5V8Exploit, Third Party Advisory
- http://seclists.org/fulldisclosure/2020/Dec/57Mailing List, Third Party Advisory
- http://seclists.org/fulldisclosure/2020/Dec/58Mailing List, Third Party Advisory
- https://github.com/geffner/CVE-2020-8289/blob/master/README.mdExploit, Third Party Advisory
- https://hackerone.com/reports/818853Permissions Required
- https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/Third Party Advisory
- https://youtu.be/W0THXbcX5V8Exploit, Third Party Advisory
Timeline
- Published
- Dec 27, 2020
- Last modified
- Jun 17, 2026
- NVD status
- Modified