CVE-2020-16116: 
NixOS vulnerability analysis and mitigation

CVE-2020-16116 affects KDE Ark versions before 20.08.0, where a maliciously crafted archive could install files outside the extraction directory through directory traversal. The vulnerability was discovered by Dominik Penner and disclosed on July 30, 2020. The issue specifically exists in the kerfuffle/jobs.cpp component, where the application failed to properly validate file paths during archive extraction (KDE Advisory).

The vulnerability is a path traversal issue (CWE-22) that allows attackers to write files outside the intended extraction directory using '../' sequences in archive file paths. The vulnerability has a CVSS v3.1 Base Score of 3.3 (Low) with vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N, indicating local attack vector, low attack complexity, no privileges required, and user interaction required (NVD).

If exploited, an attacker could craft a malicious archive that, when extracted, would place files anywhere in the user's home directory. This could lead to the installation of malicious files like modified .bashrc or malicious scripts in the ~/.config/autostart directory, potentially leading to arbitrary code execution with user privileges (KDE Advisory, Gentoo Security).

The vulnerability was fixed in Ark version 20.08.0 by implementing proper path validation. Before the fix, users were advised to avoid using the 'Extract' context menu from the Dolphin file manager and to inspect archives for suspicious '../' patterns in file paths before extraction. The fix prevents loading of malicious archives and shows a warning message to users (KDE Advisory, KDE Commit).