Is CVE-2020-11076 in the CISA KEV catalog?

No. CVE-2020-11076 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-11076?

CVE-2020-11076 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2020-11076?

CVE-2020-11076 has an EPSS score of 3.98% (89th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-11076?

Upgrade puma on debian 11 to 4.3.6-1 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2020-11076

HIGHEPSS 89th pctl

7.5

CVSS v3

NVD

Description

In Puma (RubyGem) before 4.3.4 and 3.12.5, an attacker could smuggle an HTTP response, by using an invalid transfer-encoding header. The problem has been fixed in Puma 3.12.5 and Puma 4.3.4.

CWE-444

How to fix

Remediation Available

pumaDebian

Fixed in:4.3.6-1CVE-2020-11076

pumaUbuntu

Fixed in:3.12.4-1ubuntu2+esm1USN-6682-1

Fixed in:5.5.2-2ubuntu2+esm1USN-6682-1

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

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

3.98%probability of exploitation in 30 days

89thpercentile

Elevated risk: more likely to be exploited than 89% of all known CVEs.

References

Patch1

github.com

Third-Party Advisory4

Release Notes1

github.com

Other references1

lists.fedoraproject.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.