Description
The logrotation script (/etc/cron.daily/upstart) in the Ubuntu Upstart package before 1.13.2-0ubuntu9, as used in Ubuntu Vivid 15.04, allows local users to execute arbitrary commands and gain privileges via a crafted file in /run/user/*/upstart/sessions/.
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- Ubuntu 15.04 (Development) - 'Upstart' Logrotation Privilege Escalation EDB-41765 · local · Mar 12, 2015
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- https://bugs.launchpad.net/ubuntu/+source/upstart/+bug/1425685
- 20150302 upstart logrotate privilege escalation in Ubuntu Vivid (development) mailing-list
- http://www.halfdog.net/Security/2015/UpstartLogrotationPrivilegeEscalation/
- http://packetstormsecurity.com/files/130587/Ubuntu-Vivid-Upstart-Privilege-Escalation.html