CVE-2020-8831

Apport creates a world writable lock file with root ownership in the world writable /var/lock/apport directory. If the apport/ directory does not exist (this is not uncommon as /var/lock is a tmpfs), it will create the directory, otherwise it will simply continue execution using the existing directory. This allows for a symlink attack if an attacker were to create a symlink at /var/lock/apport, changing apport's lock file location. This file could then be used to escalate privileges, for example. Fixed in versions 2.20.1-0ubuntu2.23, 2.20.9-0ubuntu7.14, 2.20.11-0ubuntu8.8 and 2.20.11-0ubuntu22.
References
Link Resource
https://launchpad.net/bugs/1862348 Exploit Third Party Advisory
https://usn.ubuntu.com/4315-1/ Third Party Advisory
https://usn.ubuntu.com/4315-2/ Third Party Advisory
Configurations

Configuration 1

cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
cpe:2.3:a:apport_project:apport:-:*:*:*:*:*:*:*

Information

Published : 2020-04-22 10:15

Updated : 2022-10-07 03:38


NVD link : CVE-2020-8831

Mitre link : CVE-2020-8831

Products Affected
CWE