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CVE-2020-8831

Description

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 apports 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.

Risk Information

Base Score
5.5
MODERATE
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
EPSS Score
Exploitation Probability
0.117

Associated Vulnerability

VulnerabilityOS Platform
automatically generate crash reports for debugging (USN-4315-1) apport_2.20.1-0ubuntu2.23_all.debLinux
automatically generate crash reports for debugging (USN-4315-1) apport_2.20.11-0ubuntu8.8_all.debLinux
automatically generate crash reports for debugging (USN-4315-1) apport_2.20.9-0ubuntu7.14_all.debLinux
automatically generate crash reports for debugging (USN-4315-1) python-apport_2.20.1-0ubuntu2.23_all.debLinux
automatically generate crash reports for debugging (USN-4315-1) python-apport_2.20.11-0ubuntu8.8_all.debLinux
automatically generate crash reports for debugging (USN-4315-1) python-apport_2.20.9-0ubuntu7.14_all.debLinux
automatically generate crash reports for debugging (USN-4315-1) python3-apport_2.20.1-0ubuntu2.23_all.debLinux
automatically generate crash reports for debugging (USN-4315-1) python3-apport_2.20.11-0ubuntu8.8_all.debLinux
automatically generate crash reports for debugging (USN-4315-1) python3-apport_2.20.9-0ubuntu7.14_all.debLinux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234