CVE-2020-8290 Privilege escalation in Backblaze
Local attackers can escalate privileges by exploiting improper permission handling in the Backblaze client update mechanism to execute rogue binaries.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-8290?
CVE-2020-8290 is a high-severity vulnerability in Backblaze, published on 27 Dec 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Backblaze for Windows and Backblaze for macOS before 7.0.0.439 suffer from improper privilege management in `bztransmit` helper due to lack of permission handling and validation before creation of client update directories allowing for local escalation of privilege via rogue client update binary.
Weakness: CWE-269
Which versions are affected by CVE-2020-8290?
It affects 1 product.
Products include Backblaze Backblaze.
How do I fix CVE-2020-8290?
No fix has been published for CVE-2020-8290 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-8290 being exploited?
There is no known exploitation of CVE-2020-8290 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-mfc8-4qmg-g3x6.