CVE-2020-8831
published 2020-04-22CVE-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…
medium5.5CVSS 3.1
AVLACLPRLUINSUCNIHAN
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.
Affected
11 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apport_project | apport | >= 0 < 2.20.1-0ubuntu2.23 | 2.20.1-0ubuntu2.23 |
| apport_project | apport | >= 0 < 2.20.9-0ubuntu7.14 | 2.20.9-0ubuntu7.14 |
| apport_project | apport | >= 0 < 2.20.11-0ubuntu22 | 2.20.11-0ubuntu22 |
| apport_project | apport | >= 0 < 2.14.1-0ubuntu3.29+esm4 | 2.14.1-0ubuntu3.29+esm4 |
| canonical | apport | >= 2.20.1 < 2.20.1-0ubuntu2.23 | 2.20.1-0ubuntu2.23 |
| canonical | apport | >= 2.20.11 < 2.20.11-0ubuntu8.8 | 2.20.11-0ubuntu8.8 |
| canonical | apport | >= 2.20.9 < 2.20.9-0ubuntu7.14 | 2.20.9-0ubuntu7.14 |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
osv5.5MEDIUM