CVE-2020-8831 (GCVE-0-2020-8831)

Vulnerability from cvelistv5 – Published: 2020-04-22 21:15 – Updated: 2024-09-16 19:00
VLAI
Title
World writable root owned lock file created in user controllable location
Summary
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.
Severity
6.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N
CWE
  • CWE-379 - Creation of Temporary File in Directory with Incorrect Permissions
Assigner
canonical CNA under the mitre root
CNA scorecard B 82/100 over 60 records in the last 180 days details
References
URL Tags
https://launchpad.net/bugs/1862348 x_refsource_CONFIRM
https://usn.ubuntu.com/4315-1/ x_refsource_CONFIRM
https://usn.ubuntu.com/4315-2/ vendor-advisoryx_refsource_UBUNTU
Impacted products
Vendor Product Version CPE status
Canonical Apport Affected: 2.20.1 , < 2.20.1-0ubuntu2.23 (custom)
Affected: 2.20.9 , < 2.20.9-0ubuntu7.14 (custom)
Affected: 2.20.11 , < 2.20.11-0ubuntu8.8 (custom)
guessed Create a notification for this product.
Date Public
2020-04-02 00:00
Credits
Maximilien Bourgeteau
Show details on NVD website
To clipboard 

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