CVE-2020-8289

Public Exploit

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.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 20.54% Top 5%
Third-Party Advisory seclists.org Third-Party Advisory seclists.org Third-Party Advisory github.com Third-Party Advisory backblaze.com Third-Party Advisory youtu.be
Affected: n/a Backblaze
Published at:
Updated at:

References

Link Tags
https://hackerone.com/reports/818853 permissions required
https://youtu.be/W0THXbcX5V8 third party advisory exploit
https://github.com/geffner/CVE-2020-8289/blob/master/README.md third party advisory exploit
https://www.backblaze.com/blog/backblaze-cloud-backup-release-7-0-1/ third party advisory
http://seclists.org/fulldisclosure/2020/Dec/57 third party advisory mailing list
http://seclists.org/fulldisclosure/2020/Dec/58 third party advisory mailing list

Frequently Asked Questions

What is the severity of CVE-2020-8289?
CVE-2020-8289 has been scored as a high severity vulnerability.
How to fix CVE-2020-8289?
To fix CVE-2020-8289, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2020-8289 being actively exploited in the wild?
It is possible that CVE-2020-8289 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~21% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2020-8289?
CVE-2020-8289 affects n/a Backblaze.
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