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amazonAmazonALAS-2023-1868
HistoryOct 16, 2023 - 1:45 p.m.

Important: tomcat8

2023-10-1613:45:00
alas.aws.amazon.com
19
apache tomcat
vulnerability
cleanup
http/2
denial of service
input validation

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

0.708 High

EPSS

Percentile

98.1%

Issue Overview:

Incomplete Cleanup vulnerability in Apache Tomcat. When recycling various internal objects in Apache Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.80 and from 8.5.0 through 8.5.93, an error could cause Tomcat to skip some parts of the recycling process leading to information leaking from the current request/response to the next. Users are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fixes the issue. (CVE-2023-42795)

The HTTP/2 protocol allows a denial of service (server resource consumption) because request cancellation can reset many streams quickly, as exploited in the wild in August through October 2023. (CVE-2023-44487)

Improper Input Validation vulnerability in Apache Tomcat. Tomcat from 11.0.0-M1 through 11.0.0-M11, from 10.1.0-M1 through 10.1.13, from 9.0.0-M1 through 9.0.81 and from 8.5.0 through 8.5.93 did not correctly parse HTTP trailer headers. A specially crafted, invalid trailer header could cause Tomcat to treat a single request as multiple requests leading to the possibility of request smuggling when behind a reverse proxy. Users are recommended to upgrade to version 11.0.0-M12 onwards, 10.1.14 onwards, 9.0.81 onwards or 8.5.94 onwards, which fix the issue. (CVE-2023-45648)

Affected Packages:

tomcat8

Issue Correction:
Run yum update tomcat8 to update your system.

New Packages:

noarch:  
    tomcat8-lib-8.5.94-1.95.amzn1.noarch  
    tomcat8-servlet-3.1-api-8.5.94-1.95.amzn1.noarch  
    tomcat8-admin-webapps-8.5.94-1.95.amzn1.noarch  
    tomcat8-log4j-8.5.94-1.95.amzn1.noarch  
    tomcat8-jsp-2.3-api-8.5.94-1.95.amzn1.noarch  
    tomcat8-8.5.94-1.95.amzn1.noarch  
    tomcat8-javadoc-8.5.94-1.95.amzn1.noarch  
    tomcat8-docs-webapp-8.5.94-1.95.amzn1.noarch  
    tomcat8-webapps-8.5.94-1.95.amzn1.noarch  
    tomcat8-el-3.0-api-8.5.94-1.95.amzn1.noarch  
  
src:  
    tomcat8-8.5.94-1.95.amzn1.src  

Additional References

Red Hat: CVE-2023-42795, CVE-2023-44487, CVE-2023-45648

Mitre: CVE-2023-42795, CVE-2023-44487, CVE-2023-45648

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

0.708 High

EPSS

Percentile

98.1%