CVE-2020-8289 Security feature bypass in Backblaze
Improper certificate validation in Backblaze clients allows remote code execution via the update mechanism due to hardcoded URL whitelists.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-8289?
CVE-2020-8289 is a high-severity vulnerability in Backblaze, published on 27 Dec 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
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.
Weakness: CWE-295
Which versions are affected by CVE-2020-8289?
It affects 1 product.
Products include Backblaze Backblaze.
How do I fix CVE-2020-8289?
No fix has been published for CVE-2020-8289 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-8289 being exploited?
There is no known exploitation of CVE-2020-8289 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Backblaze
Sources
Also known as GHSA-7f55-fqw6-8jjp.