7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.019 Low
EPSS
Percentile
88.1%
Issue Overview:
A memory leak flaw was found in Apache Tomcat, where an HTTP upgrade connection does not release for WebSocket connections once the WebSocket connection is closed. If a sufficient number of such requests are made, an OutOfMemoryError occurs, leading to a denial of service. The highest threat from this vulnerability is to system availability. (CVE-2021-42340)
Affected Packages:
tomcat8
Issue Correction:
Run yum update tomcat8 to update your system.
New Packages:
noarch:
tomcat8-log4j-8.5.72-1.89.amzn1.noarch
tomcat8-lib-8.5.72-1.89.amzn1.noarch
tomcat8-javadoc-8.5.72-1.89.amzn1.noarch
tomcat8-jsp-2.3-api-8.5.72-1.89.amzn1.noarch
tomcat8-webapps-8.5.72-1.89.amzn1.noarch
tomcat8-admin-webapps-8.5.72-1.89.amzn1.noarch
tomcat8-el-3.0-api-8.5.72-1.89.amzn1.noarch
tomcat8-servlet-3.1-api-8.5.72-1.89.amzn1.noarch
tomcat8-docs-webapp-8.5.72-1.89.amzn1.noarch
tomcat8-8.5.72-1.89.amzn1.noarch
src:
tomcat8-8.5.72-1.89.amzn1.src
Red Hat: CVE-2021-42340
Mitre: CVE-2021-42340
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.019 Low
EPSS
Percentile
88.1%