Vulnerability Details : CVE-2020-8289
Potential exploit
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.
Vulnerability category: Execute code
Products affected by CVE-2020-8289
- cpe:2.3:a:backblaze:backblaze:*:*:*:*:*:windows:*:*
- cpe:2.3:a:backblaze:backblaze:*:*:*:*:*:macos:*:*
Exploit prediction scoring system (EPSS) score for CVE-2020-8289
2.46%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 90 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2020-8289
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
---|---|---|---|---|---|---|
9.3
|
HIGH | AV:N/AC:M/Au:N/C:C/I:C/A:C |
8.6
|
10.0
|
NIST | |
7.8
|
HIGH | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
1.8
|
5.9
|
NIST |
CWE ids for CVE-2020-8289
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The product does not validate, or incorrectly validates, a certificate.Assigned by:
- nvd@nist.gov (Primary)
- support@hackerone.com (Secondary)
References for CVE-2020-8289
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https://hackerone.com/reports/818853
Sign inPermissions Required
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https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/
Backblaze Computer Backup Release 7.0.1Third Party Advisory
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http://seclists.org/fulldisclosure/2020/Dec/58
Full Disclosure: Re: CVE-2020-8150 – Remote Code Execution as SYSTEM/root via BackblazeMailing List;Third Party Advisory
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https://github.com/geffner/CVE-2020-8289/blob/master/README.md
CVE-2020-8289/README.md at master · geffner/CVE-2020-8289 · GitHubExploit;Third Party Advisory
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https://youtu.be/W0THXbcX5V8
CVE-2020-8289 – Remote Code Execution as SYSTEM/root via Backblaze (Windows PoC) - YouTubeExploit;Third Party Advisory
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http://seclists.org/fulldisclosure/2020/Dec/57
Full Disclosure: Re: [FD] CVE-2020-8150 – Remote Code Execution as SYSTEM/root via BackblazeMailing List;Third Party Advisory
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