Description
LiuOS is a small Python project meant to imitate the functions of a regular operating system. Version 0.1.0 and prior of LiuOS allow an attacker to set the GITHUB_ACTIONS environment variable to anything other than null or true and skip authentication checks. This issue is patched in the latest commit (c658b4f3e57258acf5f6207a90c2f2169698ae22) by requiring the var to be set to true, causing a test script to run instead of being able to login. A potential workaround is to check for the GITHUB_ACTIONS environment variable and set it to "" (no quotes) to null the variable and force credential checks.
References (2)
Core 2
Core References
Exploit, Third Party Advisory x_refsource_confirm
https://github.com/LiuWoodsCode/LiuOS/security/advisories/GHSA-f9x3-mj2r-cqmf
Patch, Third Party Advisory x_refsource_misc
https://github.com/LiuWoodsCode/LiuOS/commit/c658b4f3e57258acf5f6207a90c2f2169698ae22
Scores
CVSS v3
9.2
EPSS
0.0005
EPSS Percentile
16.4%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-639
Status
published
Products (1)
liuos_project/liuos
0.1.0
Published
Dec 28, 2022
Tracked Since
Feb 18, 2026