What is CVE-2020-8290?

CVE-2020-8290 is a high-severity vulnerability in Backblaze, classified under Improper Privilege Management. CVSS score: 7.8/10. Published 2020-12-27.

How severe is CVE-2020-8290?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2020-8290 known to be exploited?

6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Privilege escalation in Backblaze

CVE-2020-8290

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.

Vulnerability class: Privilege Escalation

EPSS: 0.006 (44.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Backblaze
N/a Backblaze — versions Prior to 7.0.0.439

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

Public proof-of-concept exploits

References

support@hackerone.com (Permissions Required, x_refsource_MISC)
support@hackerone.com (Exploit, Third Party Advisory, x_refsource_MISC)
support@hackerone.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2020-8290?: CVE-2020-8290 is a high-severity vulnerability in Backblaze, classified under Improper Privilege Management. CVSS score: 7.8/10. Published 2020-12-27.
How severe is CVE-2020-8290?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2020-8290 known to be exploited?: 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.