CVE-2020-13934

HIGH

Apache Tomcat < 8.5.56 - Memory Leak

Title source: rule

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.

References (13)

[Mailing List, Third Party Advisory] http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00084.html

[Mailing List, Third Party Advisory] http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00088.html

[Mailing List, Release Notes, Vendor Advisory] https://lists.apache.org/thread.html/r61f411cf82488d6ec213063fc15feeeb88e31b0ca9c29652ee4f962e%40%3Cannounce.tomcat.apache.org%3E

[Mailing List, Third Party Advisory] https://lists.debian.org/debian-lts-announce/2020/07/msg00017.html

[Third Party Advisory] https://security.netapp.com/advisory/ntap-20200724-0003/

[Third Party Advisory] https://usn.ubuntu.com/4596-1/

[Third Party Advisory] https://www.debian.org/security/2020/dsa-4727

[Patch, Third Party Advisory] https://www.oracle.com//security-alerts/cpujul2021.html

[Patch, Third Party Advisory] https://www.oracle.com/security-alerts/cpuApr2021.html

[Patch, Third Party Advisory] https://www.oracle.com/security-alerts/cpujan2021.html

[Patch, Third Party Advisory] https://www.oracle.com/security-alerts/cpujan2022.html

[Patch, Third Party Advisory] https://www.oracle.com/security-alerts/cpuoct2020.html

[Mailing List] https://lists.apache.org/thread.html/ra072b1f786e7d139e86f1d1145572e0ff71cef38a96d9c6f5362aac8%40%3Cdev.tomcat.apache.org%3E

Scores

CVSS v3 7.5

EPSS 0.2338

EPSS Percentile 95.9%

Attack Vector NETWORK

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

Classification

CWE

CWE-401 CWE-476

Status published

Affected Products (50)

apache/tomcat < 8.5.56

apache/tomcat

apache/tomcat

apache/tomcat

apache/tomcat

apache/tomcat

apache/tomcat

apache/tomcat

apache/tomcat

apache/tomcat

apache/tomcat

apache/tomcat

apache/tomcat

apache/tomcat

apache/tomcat

... and 35 more

Timeline

Published Jul 14, 2020

Tracked Since Feb 18, 2026