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
| Affected Software | Affected Version | How 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 |
| 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 |
| IBM Data Risk Manager | <=2.0.6 | |
| Tomcat | >=8.5.0<=8.5.55 | |
| Tomcat | >=9.0.0<=9.0.35 | |
| Tomcat | =9.0.0-milestone1 | |
| Tomcat | =9.0.0-milestone10 | |
| Tomcat | =9.0.0-milestone11 | |
| Tomcat | =9.0.0-milestone12 | |
| Tomcat | =9.0.0-milestone13 | |
| Tomcat | =9.0.0-milestone14 | |
| Tomcat | =9.0.0-milestone15 | |
| Tomcat | =9.0.0-milestone16 | |
| Tomcat | =9.0.0-milestone17 | |
| Tomcat | =9.0.0-milestone18 | |
| Tomcat | =9.0.0-milestone19 | |
| Tomcat | =9.0.0-milestone2 | |
| Tomcat | =9.0.0-milestone20 | |
| Tomcat | =9.0.0-milestone21 | |
| Tomcat | =9.0.0-milestone22 | |
| Tomcat | =9.0.0-milestone23 | |
| Tomcat | =9.0.0-milestone24 | |
| Tomcat | =9.0.0-milestone25 | |
| Tomcat | =9.0.0-milestone26 | |
| Tomcat | =9.0.0-milestone27 | |
| Tomcat | =9.0.0-milestone3 | |
| Tomcat | =9.0.0-milestone4 | |
| Tomcat | =9.0.0-milestone5 | |
| Tomcat | =9.0.0-milestone6 | |
| Tomcat | =9.0.0-milestone7 | |
| Tomcat | =9.0.0-milestone8 | |
| Tomcat | =9.0.0-milestone9 | |
| Tomcat | =10.0.0-milestone1 | |
| Tomcat | =10.0.0-milestone2 | |
| Tomcat | =10.0.0-milestone3 | |
| Tomcat | =10.0.0-milestone4 | |
| Tomcat | =10.0.0-milestone5 | |
| Ubuntu | =20.04 | |
| MySQL Enterprise Monitor | <=8.0.21 | |
| Oracle Siebel User Interface Framework | <=20.12 | |
| Oracle Workload Manager | =12.2.0.1 | |
| Oracle Workload Manager | =18c | |
| Oracle Workload Manager | =19c | |
| SUSE Linux | =15.1 | |
| SUSE Linux | =15.2 | |
| Debian Linux | =9.0 | |
| Debian Linux | =10.0 | |
| NetApp System Manager | =3.0 | |
| NetApp System Manager | =3.1.3 | |
| debian/tomcat9 | 9.0.43-2~deb11u10 9.0.43-2~deb11u12 9.0.70-2 9.0.95-1 |
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Reference Links
- https://www.cve.org/CVERecord?id=CVE-2020-11996 https://nvd.nist.gov/vuln/detail/CVE-2020-11996 http://mail-archives.apache.org/mod_mbox/tomcat-announce/202006.mbox/%3Cfd56bc1d-1219-605b-99c7-946bf7bd8ad4%40apache.org%3E http://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.0.0-M6 http://tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.5.56 http://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.36
- https://bugzilla.redhat.com/show_bug.cgi?id=1851420
- https://access.redhat.com/errata/RHSA-2021:3140
- https://access.redhat.com/errata/RHSA-2020:5173
- https://access.redhat.com/errata/RHSA-2020:5170
- https://access.redhat.com/errata/RHSA-2020:5388
- https://access.redhat.com/errata/RHSA-2021:0292
- https://access.redhat.com/security/cve/cve-2020-11996
- https://lists.apache.org/thread.html/r5541ef6b6b68b49f76fc4c45695940116da2bcbe0312ef204a00a2e0%40%3Cannounce.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/r93ca628ef3a4530dfe5ac49fddc795f0920a4b2a408b57a30926a42b@%3Ccommits.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/r74f5a8204efe574cbfcd95b2a16236fe95beb45c4d9fee3dc789dca9@%3Ccommits.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/r8f3d416c193bc9384a8a7dd368623d441f5fcaff1057115008100561@%3Ccommits.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/rb4ee49ecc4c59620ffd5e66e84a17e526c2c3cfa95d0cd682d90d338@%3Cnotifications.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/rea65d6ef2e45dd1c45faae83922042732866c7b88fa109b76c83db52@%3Cnotifications.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/rc80b96b4b96618b2b7461cb90664a428cfd6605eea9f74e51b792542@%3Cnotifications.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/r8f7484589454638af527182ae55ef5b628ba00c05c5b11887c922fb1@%3Cnotifications.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/rb820f1a2a02bf07414be12c653c2ab5321fd87b9bf6c5e635c53ff4b@%3Cnotifications.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/ra7092f7492569b39b04ec0decf52628ba86c51f15efb38f5853e2760@%3Cnotifications.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/r9ad911fe49450ed9405827af0e7a74104041081ff91864b1f2546bbd@%3Cnotifications.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/r6c29801370a36c1a5159679269777ad0c73276d3015b8bbefea66e5c@%3Cnotifications.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/ref0339792ac6dac1dba83c071a727ad72380899bde60f6aaad4031b9@%3Cnotifications.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/r3ea96d8f36dd404acce83df8aeb22a9e807d6c13ca9c5dec72f872cd@%3Cnotifications.ofbiz.apache.org%3E
- https://security.netapp.com/advisory/ntap-20200709-0002/
- https://lists.debian.org/debian-lts-announce/2020/07/msg00010.html
- https://www.debian.org/security/2020/dsa-4727
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00064.html
- http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00072.html
- https://lists.apache.org/thread.html/r2529016c311ce9485e6f173446d469600fdfbb94dccadfcd9dfdac79@%3Cusers.tomcat.apache.org%3E
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://usn.ubuntu.com/4596-1/
- https://www.oracle.com/security-alerts/cpujan2021.html
- https://lists.apache.org/thread.html/r5a4f80a6acc6607d61dae424b643b594c6188dd4e1eff04705c10db2@%3Cnotifications.ofbiz.apache.org%3E
- https://launchpad.net/bugs/cve/CVE-2020-11996
- https://nvd.nist.gov/vuln/detail/CVE-2020-11996
- https://github.com/apache/tomcat/commit/9434a44d3449d620b1be70206819f8275b4a7509
- https://github.com/apache/tomcat/commit/9a0231683a77e2957cea0fdee88b193b30b0c976
- https://usn.ubuntu.com/4596-1
- https://security.netapp.com/advisory/ntap-20200709-0002
- https://tomcat.apache.org/security-9.html
- https://tomcat.apache.org/security-8.html
- https://tomcat.apache.org/security-10.html
- https://github.com/apache/tomcat/commit/c8acd2ab7371e39aeca7c306f3b5380f00afe552
- https://github.com/advisories/GHSA-53hp-jpwq-2jgq (Advisory)
- http://mail-archives.apache.org/mod_mbox/tomcat-announce/202006.mbox/%3Cfd56bc1d-1219-605b-99c7-946bf7bd8ad4%40apache.org%3E
- http://tomcat.apache.org/security-10.html#Fixed_in_Apache_Tomcat_10.0.0-M6
- http://tomcat.apache.org/security-9.html#Fixed_in_Apache_Tomcat_9.0.36
- http://tomcat.apache.org/security-8.html#Fixed_in_Apache_Tomcat_8.5.56
- https://access.redhat.com/support/policy/updates/jboss_notes
- https://catalog.redhat.com/software/containers/jboss-webserver-5/webserver53-openjdk8-tomcat9-openshift-rhel7
- https://lists.apache.org/thread.html/r2529016c311ce9485e6f173446d469600fdfbb94dccadfcd9dfdac79%40%3Cusers.tomcat.apache.org%3E
- https://lists.apache.org/thread.html/r3ea96d8f36dd404acce83df8aeb22a9e807d6c13ca9c5dec72f872cd%40%3Cnotifications.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/r5a4f80a6acc6607d61dae424b643b594c6188dd4e1eff04705c10db2%40%3Cnotifications.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/r6c29801370a36c1a5159679269777ad0c73276d3015b8bbefea66e5c%40%3Cnotifications.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/r74f5a8204efe574cbfcd95b2a16236fe95beb45c4d9fee3dc789dca9%40%3Ccommits.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/r8f3d416c193bc9384a8a7dd368623d441f5fcaff1057115008100561%40%3Ccommits.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/r8f7484589454638af527182ae55ef5b628ba00c05c5b11887c922fb1%40%3Cnotifications.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/r93ca628ef3a4530dfe5ac49fddc795f0920a4b2a408b57a30926a42b%40%3Ccommits.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/r9ad911fe49450ed9405827af0e7a74104041081ff91864b1f2546bbd%40%3Cnotifications.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/ra7092f7492569b39b04ec0decf52628ba86c51f15efb38f5853e2760%40%3Cnotifications.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/rb4ee49ecc4c59620ffd5e66e84a17e526c2c3cfa95d0cd682d90d338%40%3Cnotifications.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/rb820f1a2a02bf07414be12c653c2ab5321fd87b9bf6c5e635c53ff4b%40%3Cnotifications.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/rc80b96b4b96618b2b7461cb90664a428cfd6605eea9f74e51b792542%40%3Cnotifications.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/rea65d6ef2e45dd1c45faae83922042732866c7b88fa109b76c83db52%40%3Cnotifications.ofbiz.apache.org%3E
- https://lists.apache.org/thread.html/ref0339792ac6dac1dba83c071a727ad72380899bde60f6aaad4031b9%40%3Cnotifications.ofbiz.apache.org%3E
- https://www.openwall.com/lists/oss-security/2020/06/25/6
- https://security-tracker.debian.org/tracker/CVE-2020-11996
- https://exchange.xforce.ibmcloud.com/vulnerabilities/184012
- https://www.ibm.com/support/pages/node/6335281 (Advisory)
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11996
- https://ubuntu.com/security/CVE-2020-11996
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.
- collector/redhat-cve
- agent/type
- agent/remedy
- agent/first-publish-date
- collector/launchpad-cve
- source/Launchpad
- agent/severity
- agent/weakness
- collector/github-advisory-latest
- source/GitHub
- alias/GHSA-53hp-jpwq-2jgq
- alias/CVE-2020-11996
- agent/software-canonical-lookup
- collector/github-advisory
- collector/redhat-bugzilla
- source/Red Hat
- collector/mitre-cve
- source/MITRE
- collector/usn-cve
- source/Ubuntu
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- agent/trending
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- vendor/ibm
- canonical/ibm data risk manager
- version/ibm data risk manager/2.0.6
- vendor/apache
- canonical/tomcat
- version/tomcat/8.5.0
- version/tomcat/8.5.55
- version/tomcat/9.0.0
- version/tomcat/9.0.35
- version/tomcat/9.0.0-milestone1
- version/tomcat/9.0.0-milestone10
- version/tomcat/9.0.0-milestone11
- version/tomcat/9.0.0-milestone12
- version/tomcat/9.0.0-milestone13
- version/tomcat/9.0.0-milestone14
- version/tomcat/9.0.0-milestone15
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- version/tomcat/9.0.0-milestone24
- version/tomcat/9.0.0-milestone25
- version/tomcat/9.0.0-milestone26
- version/tomcat/9.0.0-milestone27
- version/tomcat/9.0.0-milestone3
- version/tomcat/9.0.0-milestone4
- version/tomcat/9.0.0-milestone5
- version/tomcat/9.0.0-milestone6
- version/tomcat/9.0.0-milestone7
- version/tomcat/9.0.0-milestone8
- version/tomcat/9.0.0-milestone9
- version/tomcat/10.0.0-milestone1
- version/tomcat/10.0.0-milestone2
- version/tomcat/10.0.0-milestone3
- version/tomcat/10.0.0-milestone4
- version/tomcat/10.0.0-milestone5
- vendor/canonical
- canonical/ubuntu
- version/ubuntu/20.04
- vendor/oracle
- canonical/mysql enterprise monitor
- version/mysql enterprise monitor/8.0.21
- canonical/oracle siebel user interface framework
- version/oracle siebel user interface framework/20.12
- canonical/oracle workload manager
- version/oracle workload manager/12.2.0.1
- version/oracle workload manager/18c
- version/oracle workload manager/19c
- vendor/opensuse
- canonical/suse linux
- version/suse linux/15.1
- version/suse linux/15.2
- vendor/debian
- canonical/debian linux
- version/debian linux/9.0
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- version/netapp system manager/3.0
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