Title: Tenshi privilege escalation via PID file manipulation
Author: Michael Orlitzky
Fixedin: commits 46b0148 and d0e7f28, version 0.16
Tenshi 0.15 and earlier creates a tenshi.pid file after dropping privileges to a non-root account. This is exploitable by that non-root account to kill root processes, because the init script supplied by Tenshi (and many distributions) will send a SIGTERM to the contents of the PID file upon stopping the service.
Complete details here: http://michael.orlitzky.com/cves/cve-2017-11746.xhtml
For more information, call: 410-667-3600
What is CVE?
Common Vulnerabilities and Exposures (CVE®) is a list of common identifiers for publicly known cybersecurity vulnerabilities, and is the industry standard for vulnerability and exposure identifiers.
The process of creating a CVE Entry begins with the discovery of a potential security vulnerability. The MITRE Corporation currently maintains CVE and this public website, oversees the CNAs and CVE Board, and provides impartial technical guidance throughout the process to ensure CVE serves the public interest.
About Metro Data, Inc.
Founded in 1994, Metro Data, Inc. is a leading information systems & services firm that works exclusively with business clients to develop and apply customized technology solutions that accomplish a client's strategic goals.
Businesses have chosen Metro Data, Inc. to help keep pace with the ever-changing technology landscape. Metro Data, Inc.’s "end-to-end" experience helps their customers to secure their systems, reduce costs, and improve their business information systems performance.
About the CVE Author, Michael J. Orlitzky
Mike has been with Metro Data, Inc. for over 20 years. He holds a PhD in Mathematics. He has been globally recognized for his work in discovering (and fixing) vulnerabilities in operating systems and application software. His research has been published in professional journals and he's been acknowledged by industry and academic peers for his work.