Is CVE-2020-13934 in the CISA KEV catalog?

No. CVE-2020-13934 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-13934?

CVE-2020-13934 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2020-13934?

CVE-2020-13934 has an EPSS score of 64.12% (99th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-13934?

Upgrade tomcat9 on debian 11 to 9.0.37-1 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2020-13934

HIGHEPSS 99th pctl

7.5

CVSS v3

NVD

Description

An h2c direct connection to Apache Tomcat 10.0.0-M1 to 10.0.0-M6, 9.0.0.M5 to 9.0.36 and 8.5.1 to 8.5.56 did not release the HTTP/1.1 processor after the upgrade to HTTP/2. If a sufficient number of such requests were made, an OutOfMemoryException could occur leading to a denial of service.

CWE-401Missing Release of Memory (Memory Leak)CWE-476NULL Pointer Dereference

How to fix

Remediation Available

tomcat9Debian

Fixed in:9.0.37-1CVE-2020-13934

libtomcat9-embed-javaUbuntu

Fixed in:9.0.31-1ubuntu0.1USN-4596-1

libtomcat9-javaUbuntu

Fixed in:9.0.31-1ubuntu0.1USN-4596-1

tomcat9Ubuntu

Fixed in:9.0.31-1ubuntu0.1USN-4596-1

tomcat9-commonUbuntu

Fixed in:9.0.31-1ubuntu0.1USN-4596-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

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

64.12%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

Patch5

Vendor Advisory1

lists.apache.org

Third-Party Advisory6

Other references1

lists.apache.org

Related Vulnerabilities

Other CWE-401 (Missing Release of Memory (Memory Leak)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2016-6304	High	7.5	63%	-	Fix
CVE-2019-12265	Medium	5.3	55%	-	Fix
CVE-2001-0136	Medium	5.0	45%	-	-
CVE-2016-4232	High	7.5	36%	-	-
CVE-2001-0543	Medium	5.0	19%	-	-
CVE-2018-0891	Medium	4.3	15%	-	-

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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.