A vulnerability in the London Trust Media Private Internet Access (PIA) VPN Client v82 for Linux could allow an authenticated, local attacker to run arbitrary code with elevated privileges. The root_runner.64 binary is setuid root. This binary executes /opt/pia/ruby/64/ruby, which in turn attempts to load several libraries under /tmp/ruby-deploy.old/lib. A local unprivileged user can create a malicious library under this path to execute arbitrary code as the root user.
The product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors.
Link | Tags |
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https://github.com/mirchr/security-research/blob/master/vulnerabilities/PIA/CVE-2019-12575.txt | third party advisory exploit |