boneIO Black contains a TOCTOU race condition in the create_timedatectl_sudoers_file() function in boneio/webui/routes/timezone_sudoers.py. The function writes sudoers rules to a predictable temporary file, validates them, then installs them with root privileges. A local attacker can exploit the race window between validation and installation to substitute malicious content, or use the predictable filename for symlink attacks, resulting in arbitrary sudoers rule injection and local privilege escalation to root.
This issue was fixed in versionĀ 1.6.0.
Metrics
Affected Vendors & Products
References
History
Mon, 26 Oct 2026 16:30:00 +0000
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ssvc
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Mon, 26 Oct 2026 15:00:00 +0000
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| Description | boneIO Black contains a TOCTOU race condition in the create_timedatectl_sudoers_file() function in boneio/webui/routes/timezone_sudoers.py. The function writes sudoers rules to a predictable temporary file, validates them, then installs them with root privileges. A local attacker can exploit the race window between validation and installation to substitute malicious content, or use the predictable filename for symlink attacks, resulting in arbitrary sudoers rule injection and local privilege escalation to root. This issue was fixed in versionĀ 1.6.0. | |
| Title | TOCTOU Race Condition in boneIO | |
| First Time appeared |
Boneio
Boneio boneio |
|
| Weaknesses | CWE-367 | |
| CPEs | cpe:2.3:a:boneio:boneio:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Boneio
Boneio boneio |
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| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: CERT-PL
Published: 2026-10-26T14:46:02.659Z
Updated: 2026-10-26T15:35:50.139Z
Reserved: 2026-08-20T09:37:37.787Z
Link: CVE-2026-77059
Updated: 2026-10-26T15:32:02.203Z
Status : Deferred
Published: 2026-10-26T15:16:43.787
Modified: 2026-10-26T17:11:35.487
Link: CVE-2026-77059
No data.