high
7.5
CWE
400
Advisory Published
Advisory Published
Updated

CVE-2020-11996

First published: Thu Jun 25 2020(Updated: )

A specially crafted sequence of HTTP/2 requests could trigger high CPU usage for several seconds. If a sufficient number of such requests were made on concurrent HTTP/2 connections, the server could become unresponsive. Reference: <a href="https://tomcat.apache.org/security-8.html">https://tomcat.apache.org/security-8.html</a>

Credit: security@apache.org security@apache.org

Affected SoftwareAffected VersionHow to fix
redhat/jws5-jboss-logging<0:3.4.1-1.Final_redhat_00001.1.el6
0:3.4.1-1.Final_redhat_00001.1.el6
redhat/jws5-tomcat<0:9.0.36-6.redhat_5.2.el6
0:9.0.36-6.redhat_5.2.el6
redhat/jws5-tomcat-native<0:1.2.25-2.redhat_2.el6
0:1.2.25-2.redhat_2.el6
redhat/jws5-jboss-logging<0:3.4.1-1.Final_redhat_00001.1.el7
0:3.4.1-1.Final_redhat_00001.1.el7
redhat/jws5-tomcat<0:9.0.36-6.redhat_5.2.el7
0:9.0.36-6.redhat_5.2.el7
redhat/jws5-tomcat-native<0:1.2.25-2.redhat_2.el7
0:1.2.25-2.redhat_2.el7
redhat/jws5-jboss-logging<0:3.4.1-1.Final_redhat_00001.1.el8
0:3.4.1-1.Final_redhat_00001.1.el8
redhat/jws5-tomcat<0:9.0.36-6.redhat_5.2.el8
0:9.0.36-6.redhat_5.2.el8
redhat/jws5-tomcat-native<0:1.2.25-2.redhat_2.el8
0:1.2.25-2.redhat_2.el8
IBM IBM® Engineering Requirements Management DOORS<=9.7.2.7
IBM IBM® Engineering Requirements Management DOORS Web Access<=9.7.2.7
maven/org.apache.tomcat:tomcat>=8.5.0<8.5.55
8.5.55
maven/org.apache.tomcat:tomcat>=9.0.0.M1<9.0.35
9.0.35
maven/org.apache.tomcat:tomcat>=10.0.0-M1<=10.0.0-M4
10.0.0-M5
redhat/tomcat<10.0.0
10.0.0
redhat/tomcat<9.0.36
9.0.36
redhat/tomcat<8.5.56
8.5.56
ubuntu/tomcat9<9.0.31-1ubuntu0.1
9.0.31-1ubuntu0.1
ubuntu/tomcat9<9.0.36-1
9.0.36-1
debian/tomcat9
9.0.31-1~deb10u6
9.0.31-1~deb10u12
9.0.43-2~deb11u9
9.0.43-2~deb11u10
9.0.70-2
Apache Tomcat>=8.5.0<=8.5.55
Apache Tomcat>=9.0.0<=9.0.35
Apache Tomcat=9.0.0-milestone1
Apache Tomcat=9.0.0-milestone10
Apache Tomcat=9.0.0-milestone11
Apache Tomcat=9.0.0-milestone12
Apache Tomcat=9.0.0-milestone13
Apache Tomcat=9.0.0-milestone14
Apache Tomcat=9.0.0-milestone15
Apache Tomcat=9.0.0-milestone16
Apache Tomcat=9.0.0-milestone17
Apache Tomcat=9.0.0-milestone18
Apache Tomcat=9.0.0-milestone19
Apache Tomcat=9.0.0-milestone2
Apache Tomcat=9.0.0-milestone20
Apache Tomcat=9.0.0-milestone21
Apache Tomcat=9.0.0-milestone22
Apache Tomcat=9.0.0-milestone23
Apache Tomcat=9.0.0-milestone24
Apache Tomcat=9.0.0-milestone25
Apache Tomcat=9.0.0-milestone26
Apache Tomcat=9.0.0-milestone27
Apache Tomcat=9.0.0-milestone3
Apache Tomcat=9.0.0-milestone4
Apache Tomcat=9.0.0-milestone5
Apache Tomcat=9.0.0-milestone6
Apache Tomcat=9.0.0-milestone7
Apache Tomcat=9.0.0-milestone8
Apache Tomcat=9.0.0-milestone9
Apache Tomcat=10.0.0-milestone1
Apache Tomcat=10.0.0-milestone2
Apache Tomcat=10.0.0-milestone3
Apache Tomcat=10.0.0-milestone4
Apache Tomcat=10.0.0-milestone5
Canonical Ubuntu Linux=20.04
Oracle Mysql Enterprise Monitor<=8.0.21
Oracle Siebel Ui Framework<=20.12
Oracle Workload Manager=12.2.0.1
Oracle Workload Manager=18c
Oracle Workload Manager=19c
openSUSE Leap=15.1
openSUSE Leap=15.2
Debian Debian Linux=9.0
Debian Debian Linux=10.0
NetApp OnCommand System Manager=3.0
NetApp OnCommand System Manager=3.1.3

Remedy

https://lists.apache.org/thread.html/r74f5a8204efe574cbfcd95b2a16236fe95beb45c4d9fee3dc789dca9@%3Ccommits.ofbiz.apache.org%3E

Remedy

https://lists.apache.org/thread.html/r8f3d416c193bc9384a8a7dd368623d441f5fcaff1057115008100561@%3Ccommits.ofbiz.apache.org%3E

Remedy

https://lists.apache.org/thread.html/r93ca628ef3a4530dfe5ac49fddc795f0920a4b2a408b57a30926a42b@%3Ccommits.ofbiz.apache.org%3E

Remedy

https://lists.apache.org/thread.html/rc80b96b4b96618b2b7461cb90664a428cfd6605eea9f74e51b792542@%3Cnotifications.ofbiz.apache.org%3E

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is CVE-2020-11996?

    CVE-2020-11996 is a vulnerability in Apache Tomcat that could trigger high CPU usage and make the server unresponsive.

  • How does CVE-2020-11996 impact Apache Tomcat?

    CVE-2020-11996 can cause high CPU usage in Apache Tomcat and make the server unresponsive.

  • Which versions of Apache Tomcat are affected by CVE-2020-11996?

    Apache Tomcat versions 10.0.0-M1 to 10.0.0-M5, 9.0.0.M1 to 9.0.35, and 8.5.0 to 8.5.55 are affected by CVE-2020-11996.

  • How severe is CVE-2020-11996?

    CVE-2020-11996 has a severity rating of high.

  • Where can I find more information about CVE-2020-11996?

    You can find more information about CVE-2020-11996 on the Apache Tomcat website.

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