module

Apache Tomcat on RedHat Based Systems Insecure Temp Config Privilege Escalation

Disclosed
2016-10-10
Created
2023-03-14

Description

This module exploits a vulnerability in RedHat based systems where
improper file permissions are applied to /usr/lib/tmpfiles.d/tomcat.conf
for Apache Tomcat versions before 7.0.54-8. This may also work against

The configuration files in tmpfiles.d are used by systemd-tmpfiles to manage
temporary files including their creation.

With this weak permission, we're able to inject commands into systemd-tmpfiles
service to write a cron job to execute our payload.

systemd-tmpfiles is executed by default on boot on RedHat-based systems
through systemd-tmpfiles-setup.service. Depending on the system in use,
the execution of systemd-tmpfiles could also be triggered by other
services, cronjobs, startup scripts etc.

This module was tested against Tomcat 7.0.54-3 on Fedora 21.

Authors

h00die
Dawid Golunski dawid@legalhackers.com

Platform

Linux

Architectures

x86, x64

Module Options

To display the available options, load the module within the Metasploit console and run the commands ‘show options’ or ‘show advanced’:


msf > use exploit/linux/local/tomcat_rhel_based_temp_priv_esc
msf exploit(tomcat_rhel_based_temp_priv_esc) > show targets
...targets...
msf exploit(tomcat_rhel_based_temp_priv_esc) > set TARGET < target-id >
msf exploit(tomcat_rhel_based_temp_priv_esc) > show options
...show and set options...
msf exploit(tomcat_rhel_based_temp_priv_esc) > exploit

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