TOCTOU Race Condition in boneIO
Impact
boneIO versions before 1.6.0 have a TOCTOU race condition, allowing local attackers to inject arbitrary sudoers rules and escalate privileges to root. A predictable temporary file is written and validated, but can be substituted with malicious content. Local access is required.
Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.Affected packages
Affected products
Vendor version evidence. Product records are separate from automatic dependency matching.
boneIO · CERT-PL
boneIO
1 range
boneIO · CERT-PL
boneIO
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affected
1.3.0 → before 1.6.0
semver versions
Other versions: unaffected
Original source 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 version 1.6.0.
Inside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-77059View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.
cve.new JSON →Underlying weaknesses
The source’s classification of what caused the vulnerability.
Environment requirements
These conditions apply together as specified by the publisher. A matching product name alone does not establish exposure.
CERT-PL · platform conditions
Any condition may hold
Any condition may hold
Vulnerable product
cpe:2.3:a:boneio:boneio:*:*:*:*:*:*:*:*From (inclusive): 1.3.0
Before: 1.6.0
Original applicability statements
[
{
"operator": "OR",
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:a:boneio:boneio:*:*:*:*:*:*:*:*",
"versionStartIncluding": "1.3.0",
"versionEndExcluding": "1.6.0"
}
]
}
]
}
]Contributing organizations · 2
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What changed
Follow changesLarge field values are marked as truncated previews. Original source snapshots remain retained.