CVE-2019-15790

Published: 29 October 2019

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.

Priority

Medium

CVSS 3 base score: 3.3

Status

Package Release Status
apport
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 20.04 LTS (Focal Fossa)
Released (2.20.11-0ubuntu10)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (2.20.9-0ubuntu7.8)
Ubuntu 16.04 LTS (Xenial Xerus)
Released (2.20.1-0ubuntu2.20)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (2.14.1-0ubuntu3.29+esm2)
Ubuntu 12.04 ESM (Precise Pangolin) Does not exist