What is the CVSS score of CVE-2020-8290?

CVE-2020-8290 has a CVSS 3.1 base score of 7.8 (High). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.6%.

Is there a public PoC exploit available for CVE-2020-8290?

Yes, a public proof-of-concept exploit is available for CVE-2020-8290. Prioritise patching immediately. EPSS: 0.6%.

Backblaze CVE-2020-8290

HIGH

Improper Privilege Management (CWE-269)

2020-12-27 support@hackerone.com

Privilege Escalation Microsoft Apple Backblaze

7.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.8 HIGH

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

Dec 27, 2020 - 02:15 nvd

HIGH 7.8

DescriptionNVD

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.

AnalysisAI

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. Rated high severity (CVSS 7.8), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified as Improper Privilege Management (CWE-269), which allows attackers to escalate privileges to gain unauthorized elevated access. 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. Affected products include: Backblaze. Version information: before 7.0.0.439.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply principle of least privilege, validate privilege transitions, implement proper role separation.