The version of tomcat8 installed on the remote host is prior to 8.5.51-1.83. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS-2020-1353 advisory.

    In Apache Tomcat 9.0.0.M1 to 9.0.30, 8.5.0 to 8.5.50 and 7.0.0 to 7.0.99 the HTTP header parsing code used     an approach to end-of-line parsing that allowed some invalid HTTP headers to be parsed as valid. This led     to a possibility of HTTP Request Smuggling if Tomcat was located behind a reverse proxy that incorrectly     handled the invalid Transfer-Encoding header in a particular manner. Such a reverse proxy is considered     unlikely. (CVE-2020-1935)

    The refactoring present in Apache Tomcat 9.0.28 to 9.0.30, 8.5.48 to 8.5.50 and 7.0.98 to 7.0.99     introduced a regression. The result of the regression was that invalid Transfer-Encoding headers were     incorrectly processed leading to a possibility of HTTP Request Smuggling if Tomcat was located behind a     reverse proxy that incorrectly handled the invalid Transfer-Encoding header in a particular manner. Such a     reverse proxy is considered unlikely. (CVE-2019-17569)

    When using the Apache JServ Protocol (AJP), care must be taken when trusting incoming connections to     Apache Tomcat. Tomcat treats AJP connections as having higher trust than, for example, a similar HTTP     connection. If such connections are available to an attacker, they can be exploited in ways that may be     surprising. In Apache Tomcat 9.0.0.M1 to 9.0.0.30, 8.5.0 to 8.5.50 and 7.0.0 to 7.0.99, Tomcat shipped     with an AJP Connector enabled by default that listened on all configured IP addresses. It was expected     (and recommended in the security guide) that this Connector would be disabled if not required. This     vulnerability report identified a mechanism that allowed: - returning arbitrary files from anywhere in the     web application - processing any file in the web application as a JSP Further, if the web application     allowed file upload and stored those files within the web application (or the attacker was able to control     the content of the web application by some other means) then this, along with the ability to process a     file as a JSP, made remote code execution possible. It is important to note that mitigation is only     required if an AJP port is accessible to untrusted users. Users wishing to take a defence-in-depth     approach and block the vector that permits returning arbitrary files and execution as JSP may upgrade to     Apache Tomcat 9.0.31, 8.5.51 or 7.0.100 or later. A number of changes were made to the default AJP     Connector configuration in 9.0.31 to harden the default configuration. It is likely that users upgrading     to 9.0.31, 8.5.51 or 7.0.100 or later will need to make small changes to their configurations.
    (CVE-2020-1938)

    As part of our fix for this CVE, we are disabling Tomcat 2019 AJP connector in the default configuration     in alignment with the upstream changes. This change will require customers who use the default Tomcat     configuration (in which the AJP connector was previously enabled) to explicitly re-enable the connector if     they need it.  Also take note that a connector configured without an explicit address will only bind to     the loopback address.

    Examples of output from netstat before and after updating tomcat8 and tomcat7 are below (note that it is     the same on AL1 and AL2 with both tomcat7 and tomcat8).

    AL1 tomcat7:before:tcp6       0      0 :::8009                 :::*                    LISTEN     25772/javatcp6       0      0 :::8080                 :::*                    LISTEN      25772/javatcp6     0      0 127.0.0.1:8005          :::*                    LISTEN      25772/java

    After:tcp6       0      0 :::8080                 :::*                    LISTEN      25772/javatcp6     0      0 127.0.0.1:8005          :::*                    LISTEN      25772/java

    To re-enable the AJP port in Tomcat for AL1, users can uncomment the following line in     /etc/tomcat{TOMCAT_VERSION}/server.xml  and restart the service:

    See also:

    Apache Tomcat release notesTomcat 7Tomcat 8RedHatsolutions

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Detections

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Amazon Linux AMI : tomcat8 (ALAS-2020-1353)

critical Nessus Plugin ID 134575

Version 1.7

Version 1.6

Version 1.5

Version 1.7 Dec 11, 2024, 10:15 PM CVSS metrics ("Cvssv4 score" set to 0.0) CVSSv2 severity (based on None, severity decreased from "High" to "Low") Detection (updated detection logic) Plugin metadata Plugin Feed: 202412112215
Version 1.6 Jan 11, 2023, 11:56 PM Exploit attributes ("Exploited by malware" set to "True") Plugin Feed: 202301112356
Version 1.5 Dec 6, 2022, 4:40 AM Reference Plugin Feed: 202212060440