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TI-2026-80417 Aliases CVE-2026-77059GHSA-69w9-6j7r-c8fv

Race condition in boneIO sudoers handling allows root privilege escalation

Priority LOW 39CWE-367Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

boneIO versions from 1.3.0 before 1.6.0 contain a TOCTOU race condition in the create_timedatectl_sudoers_file() function. The function writes sudoers rules to a predictable temporary file, validates them, and then installs them with root privileges. A local attacker can exploit the gap between validation and installation to substitute malicious content or use symlink attacks, injecting arbitrary sudoers rules and escalating privileges to root.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00124 2nd percentileScored 2026-11-07
Fix Fixed boneIO (boneIO): 1.6.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
boneIOboneIO1.3.0 to before 1.6.01.6.0Patch availableCNA
  • boneIO VendorboneIO Affected 1.3.0 to before 1.6.0 Fixed in 1.6.0 Patch available CNA

Remediation

Update boneIO to version 1.6.0 or later, which fixes this issue.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA boneIO (boneIO) Fixed in 1.6.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    boneIO 1.6.0

    8 records Highest priority Priority MEDIUM 1 MEDIUM, 7 LOW

    Other records, highest priority first

    • TI-2026-80410 Missing authentication for Node-RED in boneIOPriority MEDIUM 40
    • TI-2026-80411 Missing authentication in boneIO firmware allows remote device controlPriority LOW 39
    • TI-2026-80420 Clickjacking in boneIO web interface allows unauthorized actionsPriority LOW 31
    Show all 8 records →

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-77059
  2. 2026-10-26 CISA SSVC decision points changed
  3. 2026-10-26 Priority changed: MEDIUM → LOW
  4. 2026-10-27 Alias added: GHSA-69w9-6j7r-c8fv

References

Advisory 1

Other 1

  • TI-2026-80413 Excessive privileges in boneIO black_debian_images allow root escalation CVSS 4.0CRITICAL 9.3
  • TI-2026-80410 Missing authentication for Node-RED in boneIO CVSS 4.0HIGH 8.7
  • TI-2026-80411 Missing authentication in boneIO firmware allows remote device control CVSS 4.0HIGH 8.7
  • TI-2026-80420 Clickjacking in boneIO web interface allows unauthorized actions CVSS 4.0MEDIUM 6.9
  • TI-2026-80414 Default credentials in boneIO MQTT broker allow remote control of devices CVSS 4.0HIGH 7.1
  • TI-2026-80418 boneIO black_debian_images exposes MQTT password hashes to local users CVSS 4.0MEDIUM 6.8
See all 10 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences