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 (hide)

OR cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:19.10:*:*:*:*:*:*:*

Configuration 2 (hide)

cpe:2.3:a:apport_project:apport:-:*:*:*:*:*:*:*

History

07 Oct 2022, 15:38

Type Values Removed Values Added
References (UBUNTU) https://usn.ubuntu.com/4315-2/ - (UBUNTU) https://usn.ubuntu.com/4315-2/ - Third Party Advisory
CPE cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:* cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*

Information

Published : 2020-04-22 22:15

Updated : 2024-02-04 21:00


NVD link : CVE-2020-8831

Mitre link : CVE-2020-8831

CVE.ORG link : CVE-2020-8831


JSON object : View

Products Affected

apport_project

  • apport

canonical

  • ubuntu_linux
CWE
CWE-59

Improper Link Resolution Before File Access ('Link Following')

CWE-379

Creation of Temporary File in Directory with Insecure Permissions