Is CVE-2020-27638 in the CISA KEV catalog?

No. CVE-2020-27638 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-27638?

CVE-2020-27638 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2020-27638?

CVE-2020-27638 has an EPSS score of 2.33% (81th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-27638?

Upgrade fastd on debian 11 to 21-1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2020-27638

HIGHEPSS 81th pctl

7.5

CVSS v3

NVD

Description

receive.c in fastd before v21 allows denial of service (assertion failure) when receiving packets with an invalid type code.

CWE-617

How to fix

Remediation Available

fastdDebian

Fixed in:21-1CVE-2020-27638

fastdUbuntu

Fixed in:17-4ubuntu0.1USN-4718-1

Fixed in:18-3ubuntu0.18.04.1USN-4718-1

Fixed in:18-3ubuntu0.1USN-4610-1

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

2.33%probability of exploitation in 30 days

81stpercentile

Elevated risk: more likely to be exploited than 81% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory3

Other references3

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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.