CVE-2022-28654: 
Linux Ubuntu vulnerability analysis and mitigation

CVE-2022-28654 is a vulnerability in Apport, a system crash reporting tool, where the is_closing_session() function allows users to fill up the apport.log file. The vulnerability was discovered by Gerrit Venema and affects multiple versions of Ubuntu Linux distributions, including versions 18.04 ESM, 20.04 LTS, 21.10, and 22.04 LTS (Ubuntu Security).

The vulnerability has been assigned a CVSS v3.1 base score of 5.5 (Medium) with the vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H. The vulnerability requires local access, low attack complexity, and low privileges, with no user interaction needed. While it doesn't impact confidentiality or integrity, it has a high impact on availability (NVD). The issue is classified as CWE-770 (Allocation of Resources Without Limits or Throttling).

The vulnerability allows a local attacker to potentially cause a denial of service condition by filling up the Apport log file. This can lead to resource consumption issues and affect system availability (Ubuntu Security).

The vulnerability requires local access to the system with low privileges to exploit. No known exploits in the wild have been reported at the time of assessment (NVD).

The vulnerability has been fixed in multiple Ubuntu versions with the following package updates: Ubuntu 22.04 (2.20.11-0ubuntu82.1), Ubuntu 21.10 (2.20.11-0ubuntu71.2), Ubuntu 20.04 (2.20.11-0ubuntu27.24), and Ubuntu 18.04 (2.20.9-0ubuntu7.28). Users are advised to update their systems to these versions (Ubuntu Security).