CVE-2020-11996
High
Description
A specially crafted sequence of HTTP/2 requests sent to Apache Tomcat 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 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.
SeverityHigh
CVSS7.5
Exploit probability—
Product
Apache Tomcat
PublishedJun 26, 2020
First seenJun 26, 2020
How to fix
Update
- org.apache.tomcat:tomcat10.0.0-M5, 9.0.35, 8.5.55 or later
- org.apache.tomcat.embed:tomcat-embed-core10.0.0-M5, 9.0.35, 8.5.55 or later
Vendor advisories
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| apache tomcat | 8.5.0 ≤ v ≤ 8.5.55, 9.0.0 ≤ v ≤ 9.0.35, 9.0.0, 10.0.0 | — |
| canonical ubuntu_linux | 20.04 | — |
| oracle mysql_enterprise_monitor | v ≤ 8.0.21 | — |
| oracle siebel_ui_framework | v ≤ 20.12 | — |
| oracle workload_manager | 12.2.0.1, 18c, 19c | — |
| opensuse leap | 15.1, 15.2 | — |
| debian debian_linux | 9.0, 10.0 | — |
| netapp oncommand_system_manager | 3.0, 3.1.3 | — |
| org.apache.tomcat:tomcatMaven | 10.0.0-M1 ≤ v < 10.0.0-M5, 9.0.0.M1 ≤ v < 9.0.35, 8.5.0 ≤ v < 8.5.55 | 10.0.0-M5, 9.0.35, 8.5.55 |
| org.apache.tomcat.embed:tomcat-embed-coreMaven | 10.0.0-M1 ≤ v < 10.0.0-M5, 9.0.0.M1 ≤ v < 9.0.35, 8.5.0 ≤ v < 8.5.55 | 10.0.0-M5, 9.0.35, 8.5.55 |
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