VULNERABILITY INTELLIGENCE
CVE-2019-15790
Description
Apport reads and writes information on a crashed process to /proc/pid with elevated privileges. Apport then determines which user the crashed process belongs to by reading /proc/pid through get_pid_info() in data/apport. An unprivileged user could exploit this to read information about a privileged running process by exploiting PID recycling. This information could then be used to obtain ASLR offsets for a process with an existing memory corruption vulnerability. The initial fix introduced regressions in the Python Apport library due to a missing argument in Report.add_proc_environ in apport/report.py. It also caused an autopkgtest failure when reading /proc/pid and with Python 2 compatibility by reading /proc maps. The initial and subsequent regression fixes are in 2.20.11-0ubuntu16, 2.20.11-0ubuntu8.6, 2.20.9-0ubuntu7.12, 2.20.1-0ubuntu2.22 and 2.14.1-0ubuntu3.29+esm3.
Weakness classification
- security@ubuntu.com: CWE-250
- nvd@nist.gov: CWE-269
Primary references
- security@ubuntu.com
- security@ubuntu.com — Issue Tracking, Third Party Advisory
- security@ubuntu.com — Exploit, Issue Tracking, Third Party Advisory
- security@ubuntu.com — Exploit, Issue Tracking, Patch, Third Party Advisory
- security@ubuntu.com — Exploit, Issue Tracking, Third Party Advisory
- security@ubuntu.com — Third Party Advisory
- security@ubuntu.com — Third Party Advisory
- security@ubuntu.com — Third Party Advisory
- security@ubuntu.com — Third Party Advisory
- security@ubuntu.com — Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108