boneIO up to 1.5.x Sudoers Management timezone_sudoers.py create_timedatectl_sudoers_file toctou

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k1.23

Summaryinfo

A vulnerability labeled as problematic has been found in boneIO up to 1.5.x. Affected by this vulnerability is the function create_timedatectl_sudoers_file of the file boneio/webui/routes/timezone_sudoers.py of the component Sudoers Management. The manipulation results in toctou. This vulnerability is reported as CVE-2026-77059. The attack requires a local approach. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability classified as problematic has been found in boneIO up to 1.5.x. Affected is the function create_timedatectl_sudoers_file of the file boneio/webui/routes/timezone_sudoers.py of the component Sudoers Management. The manipulation with an unknown input leads to a toctou vulnerability. CWE is classifying the issue as CWE-367. The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state. This is going to have an impact on integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at cert.pl. This vulnerability is traded as CVE-2026-77059 since 08/20/2026. The exploitability is told to be easy. The attack needs to be approached locally. There are known technical details, but no exploit is available.

Upgrading to version 1.6.0 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.4
VulDB Temp Score: 4.2
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Toctou
CWE: CWE-367 / CWE-362
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: boneIO 1.6.0

Timelineinfo

08/20/2026 CVE reserved
10/26/2026 +67 days Advisory disclosed
10/26/2026 +0 days VulDB entry created
10/26/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: cert.pl
Status: Confirmed

CVE: CVE-2026-77059 (🔒)
GCVE (CVE): GCVE-0-2026-77059
GCVE (VulDB): GCVE-100-426492

Entryinfo

Created: 10/26/2026 16:27
Changes: 10/26/2026 16:27 (67)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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