Lucene search

K
amazonAmazonALAS-2021-1546
HistoryOct 29, 2021 - 4:37 p.m.

Important: tomcat8

2021-10-2916:37:00
alas.aws.amazon.com
17

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  

Additional References

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%