Vulnerability · Published Dec 27, 2020 · Assigned by hackerone
CVE-2020-8289
High 7.8
In plain English
A high-severity improper certificate validation in Backblaze. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 4.7% (higher than 92% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.
Severity (CVSS NVD)7.8High
Exploit odds (30 days)4.7%top 8.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack tooling1Public PoC
Official 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 products (as reported)
Weakness: CWE-295
References
- https://hackerone.com/reports/818853 x_refsource_MISC
- https://youtu.be/W0THXbcX5V8 x_refsource_MISC
- https://github.com/geffner/CVE-2020-8289/blob/master/README.md x_refsource_MISC
- https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/ x_refsource_MISC
- 20201229 Re: [FD] CVE-2020-8150 - Remote Code Execution as SYSTEM/root via Backblaze mailing-list, x_refsource_FULLDISC
- 20201229 Re: CVE-2020-8150 - Remote Code Execution as SYSTEM/root via Backblaze mailing-list, x_refsource_FULLDISC