Is CVE-2020-27718 in the CISA KEV catalog?

No. CVE-2020-27718 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-27718?

CVE-2020-27718 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2020-27718?

CVE-2020-27718 has an EPSS score of 1.03% (60th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-27718?

Upgrade big-ip advanced web application firewall to 16.0.1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2020-27718

HIGH

7.5

CVSS v3

NVD

Description

When a BIG-IP ASM or Advanced WAF system running version 16.0.0-16.0.0.1, 15.1.0-15.1.0.5, 14.1.0-14.1.3, 13.1.0-13.1.3.4, 12.1.0-12.1.5.2, or 11.6.1-11.6.5.2 processes requests with JSON payload, an unusually large number of parameters can cause excessive CPU usage in the BIG-IP ASM bd process.

How to fix

Remediation Available

big-ip advanced web application firewallNVD

Affected:>= 16.0.0, < 16.0.1Fixed in:16.0.1CVE-2020-27718derived from NVD

big-ip application security managerNVD

Affected:>= 16.0.0, < 16.0.1Fixed in:16.0.1CVE-2020-27718derived 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 VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

1.03%probability of exploitation in 30 days

60thpercentile

Moderate risk: more likely to be exploited than 60% of all known CVEs.

References

Vendor Advisory1

support.f5.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.