CVE-2020-13934

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 64.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-07-14 · updated 2026-10-08
Weakness: CWE-401

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.

Affected products

Apache Tomcat: from 8.5.1 through 8.5.56; from 9.0.1 through 9.0.36; 9.0.0-milestone10, 9.0.0-milestone11, 9.0.0-milestone12, 9.0.0-milestone13, 9.0.0-milestone14, 9.0.0-milestone15 (+23)
Canonical Ubuntu Linux: 20.04
Debian Linux: 9.0, 10.0
OnCommand System Manager 9.x: from 3.0.0 through 3.1.3
openSUSE Leap: 15.1, 15.2
Oracle Corporation Oracle Agile Engineering Data Management: 6.2.1.0
Oracle Corporation Oracle Agile PLM: 9.3.3, 9.3.5, 9.3.6
Oracle Communications Instant Messaging Server: 10.0.1.5.0
Oracle Fmw Platform: 12.2.1.3.0, 12.2.1.4.0
Oracle Instantis Enterprisetrack: 17.1, 17.2, 17.3
Oracle Corporation Oracle Managed File Transfer: 12.2.1.3.0, 12.2.1.4.0
Oracle Corporation MySQL Enterprise Monitor: through 8.0.21
Oracle Corporation Siebel UI Framework: through 20.12
Oracle Workload Manager: 12.2.0.1, 18c, 19c

References

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