Upstream information

CVE-2020-11996 at MITRE

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.

SUSE information

Overall state of this security issue: Running

This issue is currently rated as having moderate severity.

CVSS v2 Scores
  National Vulnerability Database
Base Score 5
Vector AV:N/AC:L/Au:N/C:N/I:N/A:P
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact None
Integrity Impact None
Availability Impact Partial
CVSS v3 Scores
  National Vulnerability Database SUSE
Base Score 7.5 5.3
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Access Vector Network Network
Access Complexity Low Low
Privileges Required None None
User Interaction None None
Scope Unchanged Unchanged
Confidentiality Impact None None
Integrity Impact None None
Availability Impact High Low
CVSSv3 Version 3.1 3.1
SUSE Bugzilla entry: 1173389 [NEW]

SUSE Security Advisories:

List of released packages

Product(s) Fixed package version(s) References
SUSE Linux Enterprise High Performance Computing 15-ESPOS
SUSE Linux Enterprise High Performance Computing 15-LTSS
  • tomcat >= 9.0.36-3.60.1
  • tomcat-admin-webapps >= 9.0.36-3.60.1
  • tomcat-el-3_0-api >= 9.0.36-3.60.1
  • tomcat-jsp-2_3-api >= 9.0.36-3.60.1
  • tomcat-lib >= 9.0.36-3.60.1
  • tomcat-servlet-4_0-api >= 9.0.36-3.60.1
  • tomcat-webapps >= 9.0.36-3.60.1
Patchnames:
SUSE-SLE-Product-HPC-15-2020-1841
SUSE Linux Enterprise Server 15-LTSS
  • tomcat >= 9.0.36-3.60.1
  • tomcat-admin-webapps >= 9.0.36-3.60.1
  • tomcat-el-3_0-api >= 9.0.36-3.60.1
  • tomcat-jsp-2_3-api >= 9.0.36-3.60.1
  • tomcat-lib >= 9.0.36-3.60.1
  • tomcat-servlet-4_0-api >= 9.0.36-3.60.1
  • tomcat-webapps >= 9.0.36-3.60.1
Patchnames:
SUSE-SLE-Product-SLES-15-2020-1841
SUSE Linux Enterprise Server for SAP Applications 15
  • tomcat >= 9.0.36-3.60.1
  • tomcat-admin-webapps >= 9.0.36-3.60.1
  • tomcat-el-3_0-api >= 9.0.36-3.60.1
  • tomcat-jsp-2_3-api >= 9.0.36-3.60.1
  • tomcat-lib >= 9.0.36-3.60.1
  • tomcat-servlet-4_0-api >= 9.0.36-3.60.1
  • tomcat-webapps >= 9.0.36-3.60.1
Patchnames:
SUSE-SLE-Product-SLES_SAP-15-2020-1841

List of packages in QA

Product(s) Package(s)
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP1
  • tomcat >= 9.0.36-4.38.1
  • tomcat-docs-webapp >= 9.0.36-4.38.1
  • tomcat-embed >= 9.0.36-4.38.1
  • tomcat-javadoc >= 9.0.36-4.38.1
  • tomcat-jsvc >= 9.0.36-4.38.1
SUSE Linux Enterprise Module for Open Buildservice Development Tools 15 SP2
  • tomcat >= 9.0.36-3.3.1
  • tomcat-docs-webapp >= 9.0.36-3.3.1
  • tomcat-embed >= 9.0.36-3.3.1
  • tomcat-javadoc >= 9.0.36-3.3.1
  • tomcat-jsvc >= 9.0.36-3.3.1
SUSE Linux Enterprise Module for Web Scripting 15 SP1
  • tomcat >= 9.0.36-4.38.1
  • tomcat-admin-webapps >= 9.0.36-4.38.1
  • tomcat-el-3_0-api >= 9.0.36-4.38.1
  • tomcat-jsp-2_3-api >= 9.0.36-4.38.1
  • tomcat-lib >= 9.0.36-4.38.1
  • tomcat-servlet-4_0-api >= 9.0.36-4.38.1
  • tomcat-webapps >= 9.0.36-4.38.1
SUSE Linux Enterprise Module for Web Scripting 15 SP2
  • tomcat >= 9.0.36-3.3.1
  • tomcat-admin-webapps >= 9.0.36-3.3.1
  • tomcat-el-3_0-api >= 9.0.36-3.3.1
  • tomcat-jsp-2_3-api >= 9.0.36-3.3.1
  • tomcat-lib >= 9.0.36-3.3.1
  • tomcat-servlet-4_0-api >= 9.0.36-3.3.1
  • tomcat-webapps >= 9.0.36-3.3.1
SUSE Linux Enterprise Server 12 SP4-ESPOS
  • tomcat >= 9.0.36-3.42.2
  • tomcat-admin-webapps >= 9.0.36-3.42.2
  • tomcat-docs-webapp >= 9.0.36-3.42.2
  • tomcat-el-3_0-api >= 9.0.36-3.42.2
  • tomcat-javadoc >= 9.0.36-3.42.2
  • tomcat-jsp-2_3-api >= 9.0.36-3.42.2
  • tomcat-lib >= 9.0.36-3.42.2
  • tomcat-servlet-4_0-api >= 9.0.36-3.42.2
  • tomcat-webapps >= 9.0.36-3.42.2
SUSE Linux Enterprise Server 12 SP5
  • tomcat >= 9.0.36-3.42.2
  • tomcat-admin-webapps >= 9.0.36-3.42.2
  • tomcat-docs-webapp >= 9.0.36-3.42.2
  • tomcat-el-3_0-api >= 9.0.36-3.42.2
  • tomcat-javadoc >= 9.0.36-3.42.2
  • tomcat-jsp-2_3-api >= 9.0.36-3.42.2
  • tomcat-lib >= 9.0.36-3.42.2
  • tomcat-servlet-4_0-api >= 9.0.36-3.42.2
  • tomcat-webapps >= 9.0.36-3.42.2
SUSE Linux Enterprise Server for SAP Applications 12 SP4
  • tomcat >= 9.0.36-3.42.2
  • tomcat-admin-webapps >= 9.0.36-3.42.2
  • tomcat-docs-webapp >= 9.0.36-3.42.2
  • tomcat-el-3_0-api >= 9.0.36-3.42.2
  • tomcat-javadoc >= 9.0.36-3.42.2
  • tomcat-jsp-2_3-api >= 9.0.36-3.42.2
  • tomcat-lib >= 9.0.36-3.42.2
  • tomcat-servlet-4_0-api >= 9.0.36-3.42.2
  • tomcat-webapps >= 9.0.36-3.42.2
SUSE Linux Enterprise Server for SAP Applications 12 SP4-ESPOS
  • tomcat >= 9.0.36-3.42.2
  • tomcat-admin-webapps >= 9.0.36-3.42.2
  • tomcat-docs-webapp >= 9.0.36-3.42.2
  • tomcat-el-3_0-api >= 9.0.36-3.42.2
  • tomcat-javadoc >= 9.0.36-3.42.2
  • tomcat-jsp-2_3-api >= 9.0.36-3.42.2
  • tomcat-lib >= 9.0.36-3.42.2
  • tomcat-servlet-4_0-api >= 9.0.36-3.42.2
  • tomcat-webapps >= 9.0.36-3.42.2
SUSE Linux Enterprise Server for SAP Applications 12 SP5
  • tomcat >= 9.0.36-3.42.2
  • tomcat-admin-webapps >= 9.0.36-3.42.2
  • tomcat-docs-webapp >= 9.0.36-3.42.2
  • tomcat-el-3_0-api >= 9.0.36-3.42.2
  • tomcat-javadoc >= 9.0.36-3.42.2
  • tomcat-jsp-2_3-api >= 9.0.36-3.42.2
  • tomcat-lib >= 9.0.36-3.42.2
  • tomcat-servlet-4_0-api >= 9.0.36-3.42.2
  • tomcat-webapps >= 9.0.36-3.42.2
SUSE OpenStack Cloud 9
  • tomcat >= 9.0.36-3.42.2
  • tomcat-admin-webapps >= 9.0.36-3.42.2
  • tomcat-docs-webapp >= 9.0.36-3.42.2
  • tomcat-el-3_0-api >= 9.0.36-3.42.2
  • tomcat-javadoc >= 9.0.36-3.42.2
  • tomcat-jsp-2_3-api >= 9.0.36-3.42.2
  • tomcat-lib >= 9.0.36-3.42.2
  • tomcat-servlet-4_0-api >= 9.0.36-3.42.2
  • tomcat-webapps >= 9.0.36-3.42.2
SUSE OpenStack Cloud Crowbar 9
  • tomcat >= 9.0.36-3.42.2
  • tomcat-admin-webapps >= 9.0.36-3.42.2
  • tomcat-docs-webapp >= 9.0.36-3.42.2
  • tomcat-el-3_0-api >= 9.0.36-3.42.2
  • tomcat-javadoc >= 9.0.36-3.42.2
  • tomcat-jsp-2_3-api >= 9.0.36-3.42.2
  • tomcat-lib >= 9.0.36-3.42.2
  • tomcat-servlet-4_0-api >= 9.0.36-3.42.2
  • tomcat-webapps >= 9.0.36-3.42.2


Status of this issue by product and package

Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.

Product(s) Source package State
SUSE Business Critical Linux 12 SP2 tomcat Not affected
SUSE Business Critical Linux 12 SP3 tomcat Not affected
SUSE Linux Enterprise High Performance Computing 12 tomcat In progress
SUSE Linux Enterprise High Performance Computing ESPOS 15 GA tomcat Released
SUSE Linux Enterprise High Performance Computing LTSS 15 GA tomcat Released
SUSE Linux Enterprise Module for Web and Scripting 15 tomcat In progress
SUSE Linux Enterprise Server 11 SP4 LTSS tomcat6 Not affected
SUSE Linux Enterprise Server 12 SP2 LTSS tomcat Not affected
SUSE Linux Enterprise Server 12 SP3 LTSS tomcat Not affected
SUSE Linux Enterprise Server 12 SP4 tomcat In progress
SUSE Linux Enterprise Server 12 SP4 LTSS tomcat In progress
SUSE Linux Enterprise Server 12 SP5 tomcat In progress
SUSE Linux Enterprise Server 15 GA LTSS tomcat Released
SUSE Linux Enterprise Server for SAP Applications 12 SP2 tomcat Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP3 tomcat Not affected
SUSE Linux Enterprise Server for SAP Applications 12 SP4 tomcat In progress
SUSE Linux Enterprise Server for SAP Applications 12 SP5 tomcat In progress