Is CVE-2021-37147 in the CISA KEV catalog?

No. CVE-2021-37147 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-37147?

CVE-2021-37147 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2021-37147?

CVE-2021-37147 has an EPSS score of 2.44% (82th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-37147?

Upgrade trafficserver on debian 11 to 8.1.1+ds-1.1+deb11u1 or later.

CVE & CISA-KEV Catalog

CVE-2021-37147

HIGHEPSS 82th pctl

7.5

CVSS v3

NVD

Description

Improper input validation vulnerability in header parsing of Apache Traffic Server allows an attacker to smuggle requests. This issue affects Apache Traffic Server 8.0.0 to 8.1.2 and 9.0.0 to 9.1.0.

CWE-20Improper Input Validation CWE-444

How to fix

Remediation Available

trafficserverDebian

Fixed in:8.1.1+ds-1.1+deb11u1CVE-2021-37147

Fixed in:9.1.1+ds-1CVE-2021-37147

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

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

2.44%probability of exploitation in 30 days

82ndpercentile

Elevated risk: more likely to be exploited than 82% of all known CVEs.

References

Patch1

lists.apache.org

Third-Party Advisory1

debian.org

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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.