CVE-2019-15790 Detail

Current 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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  3.3 LOW
Vector:  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Nist CVSS score does not match with CNA score
CNA:  Canonical Ltd.
Base Score:  2.8 LOW
Vector:  CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: It is possible that the NVD CVSS may not match that of the CNA. The most common reason for this is that publicly available information does not provide sufficient detail or that information simply was not available at the time the CVSS vector string was assigned.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://bugs.launchpad.net/apport/+bug/1854237 Issue Tracking  Third Party Advisory 
https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1839795 Exploit  Issue Tracking  Third Party Advisory 
https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1850929 Exploit  Issue Tracking  Patch  Third Party Advisory 
https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1851806 Exploit  Issue Tracking  Third Party Advisory 
https://usn.ubuntu.com/4171-1/ Third Party Advisory 
https://usn.ubuntu.com/4171-2/ Third Party Advisory 
https://usn.ubuntu.com/4171-3/ Third Party Advisory 
https://usn.ubuntu.com/4171-4/ Third Party Advisory 
https://usn.ubuntu.com/4171-5/ Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-269 Improper Privilege Management cwe source acceptance level NIST  
CWE-250 Execution with Unnecessary Privileges Reference acceptance level Canonical Ltd.  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2019-15790
NVD Published Date:
04/27/2020
NVD Last Modified:
05/13/2020
Source:
Canonical Ltd.