Link Following Affecting apport package, versions <2.20.11-0ubuntu22
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Test your applications- Snyk ID SNYK-UBUNTU2004-APPORT-578279
- published 2 Apr 2020
- disclosed 22 Apr 2020
How to fix?
Upgrade Ubuntu:20.04
apport
to version 2.20.11-0ubuntu22 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream apport
package and not the apport
package as distributed by Ubuntu
.
See How to fix?
for Ubuntu:20.04
relevant fixed versions and status.
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.