Is CVE-2020-8289 in the CISA KEV catalog?

No. CVE-2020-8289 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-8289?

CVE-2020-8289 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2020-8289?

CVE-2020-8289 has an EPSS score of 4.66% (91th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-8289?

Upgrade backblaze to 7.0.1.433 or later.

CVE & CISA-KEV Catalog

CVE-2020-8289

HIGHEPSS 91th pctl

7.8

CVSS v3

NVD

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.

CWE-295Improper Certificate Validation

How to fix

Remediation Available

backblazeNVD

Affected:< 7.0.1.433Fixed in:7.0.1.433CVE-2020-8289derived from NVD

Affected:< 7.0.1.434Fixed in:7.0.1.434CVE-2020-8289derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

4.66%probability of exploitation in 30 days

91stpercentile

High risk: more likely to be exploited than 91% of all known CVEs.

References

Exploit2

Third-Party Advisory3

Other references1

hackerone.com

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.