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CVE-2025-32955

Harden-Runner Evasion of 'disable-sudo' policy

Published: Apr 21, 2025Updated: Apr 23, 2025 Sources: CVE List NVD GHSA BDUCWE-268
NVD MITRE
6.0CVSSMEDIUM
EPSS Score
0.2%
Top 91.5%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

Harden-Runner is a CI/CD security agent that works like an EDR for GitHub Actions runners. Versions from 0.12.0 to before 2.12.0 are vulnerable to `disable-sudo` bypass. Harden-Runner includes a policy option `disable-sudo` to prevent the GitHub Actions runner user from using sudo. This is implemented by removing the runner user from the sudoers file. However, this control can be bypassed as the runner user, being part of the docker group, can interact with the Docker daemon to launch privileged containers or access the host filesystem. This allows the attacker to regain root access or restore the sudoers file, effectively bypassing the restriction. This issue has been patched in version 2.12.0.

CVSS Vector Breakdown

AV:LAC:LPR:HUI:NS:UC:NI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-268CWE-269

Affected Products

harden-runnerstep-security
On-prem
Security Products / vuln-mgmt-scanner
Harden-RunnerStepSecurity
On-prem
Security Products / vuln-mgmt-scanner
step-security/harden-runnerGitHub Actions
SaaS
DevTools & CI / ci-cd
step-securitycommercialSecurity Productsaka step-security
stepsecuritycommercialSecurity Products
github actionscommercialUSDevTools & CIaka github actions

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

https://github.com/step-security/harden-runner/security/advisories/GHSA-mxr3-8whj-j74r
github.com
https://github.com/step-security/harden-runner/commit/0634a2670c59f64b4a01f0f96f84700a4088b9f0
github.com
https://github.com/step-security/harden-runner/releases/tag/v2.12.0
github.com
and 5 more references View all →

Timeline

Published
Apr 21, 2025
Last Updated
Apr 23, 2025

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