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CVE-2020-1938

Status Candidate

Overview

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.

Related Files

Red Hat Security Advisory 2020-2840-01
Posted Jul 7, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-2840-01 - Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages technologies. Issues addressed include a file read vulnerability.

tags | advisory, java
systems | linux, redhat
advisories | CVE-2020-1938
MD5 | fd6aa8df8eb465aed0ae45359df80d57
Red Hat Security Advisory 2020-2783-01
Posted Jul 1, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-2783-01 - Red Hat JBoss Enterprise Application Platform is a platform for Java applications based on the JBoss Application Server. This release of Red Hat JBoss Enterprise Application Platform 6.4.23 serves as a replacement for Red Hat JBoss Enterprise Application Platform 6.4.22, and includes bug fixes and enhancements, which are documented in the Release Notes document listed in the References section.

tags | advisory, java
systems | linux, redhat
advisories | CVE-2019-14885, CVE-2020-1938
MD5 | b57faade7c43292eb00612c377b499a1
Red Hat Security Advisory 2020-2779-01
Posted Jul 1, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-2779-01 - Red Hat JBoss Enterprise Application Platform is a platform for Java applications based on the JBoss Application Server. This release of Red Hat JBoss Enterprise Application Platform 6.4.23 serves as a replacement for Red Hat JBoss Enterprise Application Platform 6.4.22, and includes bug fixes and enhancements, which are documented in the Release Notes document listed in the References section.

tags | advisory, java
systems | linux, redhat
advisories | CVE-2019-14885, CVE-2020-1938
MD5 | e7a0c430bde2fc6cd9da8e4311eb26d1
Red Hat Security Advisory 2020-2780-01
Posted Jul 1, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-2780-01 - Red Hat JBoss Enterprise Application Platform is a platform for Java applications based on the JBoss Application Server. This release of Red Hat JBoss Enterprise Application Platform 6.4.23 serves as a replacement for Red Hat JBoss Enterprise Application Platform 6.4.22, and includes bug fixes and enhancements, which are documented in the Release Notes document linked to in the References.

tags | advisory, java
systems | linux, redhat
advisories | CVE-2019-14885, CVE-2020-1938
MD5 | cf573e3774f6463d1edb038a3ac1b6ce
Red Hat Security Advisory 2020-2781-01
Posted Jul 1, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-2781-01 - Red Hat JBoss Enterprise Application Platform is a platform for Java applications based on the JBoss Application Server. This release of Red Hat JBoss Enterprise Application Platform 6.4.23 serves as a replacement for Red Hat JBoss Enterprise Application Platform 6.4.22, and includes bug fixes and enhancements, which are documented in the Release Notes document listed in the References section.

tags | advisory, java
systems | linux, redhat
advisories | CVE-2019-14885, CVE-2020-1938
MD5 | e3cde23b1f8d16b486a10dc286e99b81
Red Hat Security Advisory 2020-2367-01
Posted Jun 4, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-2367-01 - Red Hat support for Spring Boot provides an application platform that reduces the complexity of developing and operating applications for OpenShift as a containerized platform. This release of Red Hat support for Spring Boot 2.1.13 serves as a replacement for Red Hat support for Spring Boot 2.1.12, and includes security and bug fixes and enhancements. Issues addressed include HTTP request smuggling and denial of service vulnerabilities.

tags | advisory, web, denial of service, vulnerability
systems | linux, redhat
advisories | CVE-2019-14888, CVE-2020-1745, CVE-2020-1935, CVE-2020-1938
MD5 | 0bb1faf39aa0c667cf7478cb7feaf07c
Red Hat Security Advisory 2020-1520-01
Posted Apr 21, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-1520-01 - Red Hat JBoss Web Server is a fully integrated and certified set of components for hosting Java web applications. It is comprised of the Apache Tomcat Servlet container, JBoss HTTP Connector, the PicketLink Vault extension for Apache Tomcat, and the Tomcat Native library. This release of Red Hat JBoss Web Server 5.3 serves as a replacement for Red Hat JBoss Web Server 5.2, and includes bug fixes, enhancements, and component upgrades, which are documented in the Release Notes, linked to in the References. Issues addressed include a privilege escalation vulnerability.

tags | advisory, java, web
systems | linux, redhat
advisories | CVE-2019-12418, CVE-2019-17563, CVE-2019-17569, CVE-2020-1935, CVE-2020-1938
MD5 | 261f442204f082d31ecbd59b1b2e616e
Red Hat Security Advisory 2020-1521-01
Posted Apr 21, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-1521-01 - Red Hat JBoss Web Server is a fully integrated and certified set of components for hosting Java web applications. It is comprised of the Apache Tomcat Servlet container, JBoss HTTP Connector, the PicketLink Vault extension for Apache Tomcat, and the Tomcat Native library. This release of Red Hat JBoss Web Server 5.3 serves as a replacement for Red Hat JBoss Web Server 5.2, and includes bug fixes, enhancements, and component upgrades, which are documented in the Release Notes, linked to in the References. Issues addressed include a privilege escalation vulnerability.

tags | advisory, java, web
systems | linux, redhat
advisories | CVE-2019-12418, CVE-2019-17563, CVE-2019-17569, CVE-2020-1935, CVE-2020-1938
MD5 | c60aa435de8678a1ff26836010ad236b
Red Hat Security Advisory 2020-1478-01
Posted Apr 15, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-1478-01 - Red Hat JBoss Enterprise Application Platform is a platform for Java applications based on the JBoss Application Server. This asynchronous patch is a security update for the Apache Tomcat package in JBoss Enterprise Application Platform 6.4 for Red Hat Enterprise Linux 5, 6, and 7. All users of Red Hat JBoss Enterprise Application Platform 6.4 are advised to upgrade to this updated package.

tags | advisory, java
systems | linux, redhat
advisories | CVE-2020-1938
MD5 | 9acf2001e3861b462f4222552972c986
Red Hat Security Advisory 2020-1479-01
Posted Apr 15, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-1479-01 - Red Hat JBoss Enterprise Application Platform is a platform for Java applications based on the JBoss Application Server. This asynchronous patch is a security update for the Apache Tomcat package in JBoss Enterprise Application Platform 6.4 for Red Hat Enterprise Linux 5, 6, and 7. All users of Red Hat JBoss Enterprise Application Platform 6.4 are advised to upgrade to these updated packages.

tags | advisory, java
systems | linux, redhat
advisories | CVE-2020-1938
MD5 | e9362979d761e4c18bc707e84451f0a2
Red Hat Security Advisory 2020-0912-01
Posted Mar 23, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-0912-01 - Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages technologies. A file read / inclusion vulnerability was addressed.

tags | advisory, java
systems | linux, redhat
advisories | CVE-2020-1938
MD5 | cf318e2d743bcbcf5aaead7a2d39776a
Gentoo Linux Security Advisory 202003-43
Posted Mar 19, 2020
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 202003-43 - Multiple vulnerabilities have been found in Apache Tomcat, the worst of which could lead to arbitrary code execution. Versions less than 8.5.51 are affected.

tags | advisory, arbitrary, vulnerability, code execution
systems | linux, gentoo
advisories | CVE-2019-0221, CVE-2019-12418, CVE-2019-17563, CVE-2020-1938
MD5 | 0706e45ff179a253dcaf250f869f7c9e
Red Hat Security Advisory 2020-0855-01
Posted Mar 17, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-0855-01 - Apache Tomcat is a servlet container for the Java Servlet and JavaServer Pages technologies. A file read / inclusion vulnerability was addressed.

tags | advisory, java
systems | linux, redhat
advisories | CVE-2020-1938
MD5 | 958cfb23338734260756257ad344b660
Red Hat Security Advisory 2020-0861-01
Posted Mar 17, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-0861-01 - Red Hat JBoss Web Server is a fully integrated and certified set of components for hosting Java web applications. It is comprised of the Apache HTTP Server, the Apache Tomcat Servlet container, Apache Tomcat Connector, JBoss HTTP Connector, Hibernate, and the Tomcat Native library. This release of Red Hat JBoss Web Server 3.1 Service Pack 8 serves as a replacement for Red Hat JBoss Web Server 3.1, and includes bug fixes, which are documented in the Release Notes document linked to in the References. Issues addressed include a cross site scripting vulnerability.

tags | advisory, java, web, xss
systems | linux, redhat
advisories | CVE-2019-0221, CVE-2019-12418, CVE-2019-17563, CVE-2020-1938
MD5 | ce03caf269541673addd5abe38bc256a
Red Hat Security Advisory 2020-0860-01
Posted Mar 17, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-0860-01 - Red Hat JBoss Web Server is a fully integrated and certified set of components for hosting Java web applications. It is comprised of the Apache HTTP Server, the Apache Tomcat Servlet container, Apache Tomcat Connector, JBoss HTTP Connector, Hibernate, and the Tomcat Native library. This release of Red Hat JBoss Web Server 3.1 Service Pack 8 serves as a replacement for Red Hat JBoss Web Server 3.1, and includes bug fixes, which are documented in the Release Notes document linked to in the References. Issues addressed include a cross site scripting vulnerability.

tags | advisory, java, web, xss
systems | linux, redhat
advisories | CVE-2019-0221, CVE-2019-12418, CVE-2019-17563, CVE-2020-1938
MD5 | 6ba3b558d781a2b1987bc3aaaa7ddf4a
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