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Category:   Application (Web Server/CGI)  >   Apache Tomcat Vendors:   Apache Software Foundation
Apache Tomcat Weak Configuration File Permissions on Red Hat-based Systems Lets Local Users Obtain Root Privileges
SecurityTracker Alert ID:  1036979
SecurityTracker URL:  http://securitytracker.com/id/1036979
CVE Reference:   CVE-2016-5425   (Links to External Site)
Date:  Oct 10 2016
Impact:   Modification of user information, Root access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  

Description:   A vulnerability was reported in Apache Tomcat. A local user can obtain root privileges on the target system.

Some distributions create a configuration file in the 'tmpfiles.d' directory with 'tomcat' user and group write permissions. A local user with 'tomcat' user privileges can modify the 'tomcat.conf' file to include arbitrary shell commands that will be executed by '/usr/bin/systemd-tmpfiles' with root privileges.

Red Hat-based systems are affected.

The original advisory is available at:

http://legalhackers.com/advisories/Tomcat-RedHat-Pkgs-Root-PrivEsc-Exploit-CVE-2016-5425.html

A demonstration exploit is available at:

http://legalhackers.com/exploits/tomcat-RH-root.sh

Dawid Golunski of LegalHackers reported this vulnerability.

Impact:   A local user with 'tomcat' user privileges can obtain root privileges on the target system.
Solution:   Individual operating system distribution vendors are issuing fixes for their respective distributions.
Vendor URL:  tomcat.apache.org/ (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (CentOS), Linux (Oracle), Linux (Red Hat Enterprise), Linux (Red Hat Fedora)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Oct 10 2016 (Red Hat Issues Fix) Apache Tomcat Weak Configuration File Permissions on Red Hat-based Systems Lets Local Users Obtain Root Privileges
Red Hat has issued a fix for Red Hat Enterprise Linux 7.



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