CVE-2024-29055 Overview
CVE-2024-29055 is an elevation of privilege vulnerability affecting Microsoft Defender for IoT. The flaw is categorized under [CWE-284] Improper Access Control and allows an authenticated attacker with high privileges to escalate their access on affected systems. Microsoft disclosed the vulnerability as part of its April 2024 security update cycle.
The issue impacts confidentiality, integrity, and availability of the target host. Exploitation requires network access and existing privileged credentials, but no user interaction. The EPSS probability for exploitation stands at 2.291%, placing this CVE in the 81st percentile of tracked vulnerabilities.
Critical Impact
Successful exploitation grants an attacker elevated privileges on Microsoft Defender for IoT deployments, enabling further compromise of monitored operational technology environments.
Affected Products
- Microsoft Defender for IoT (all versions prior to the April 2024 patch)
- On-premises Defender for IoT management consoles
- Sensor appliances integrated with Defender for IoT
Discovery Timeline
- 2024-04-09 - CVE-2024-29055 published to NVD
- 2024-04-09 - Microsoft releases security patch via Microsoft Security Update Guide
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-29055
Vulnerability Analysis
CVE-2024-29055 is an elevation of privilege vulnerability in Microsoft Defender for IoT, Microsoft's security monitoring platform for Internet of Things (IoT) and operational technology (OT) networks. The vulnerability stems from improper access control checks within the product, classified as [CWE-284].
An attacker who already possesses high-privileged credentials on the affected system can leverage this flaw to gain additional privileges beyond those originally granted. The attack proceeds over the network without user interaction. Because Defender for IoT typically has broad visibility into industrial and IoT networks, privilege escalation on the platform can extend adversary reach into monitored assets.
Root Cause
The root cause is improper access control (CWE-284) within Microsoft Defender for IoT. Access decisions performed by the product fail to correctly restrict certain privileged operations, allowing an authenticated user to perform actions reserved for higher-authority roles. Microsoft has not published low-level technical details of the affected code paths.
Attack Vector
The attack vector is network-based with low complexity. The attacker must be authenticated with high privileges on the target Defender for IoT instance. Once authenticated, the adversary issues requests that bypass the intended authorization boundary, escalating privileges within the management plane. No user interaction is required to complete the attack.
No public proof-of-concept exploit has been released, and the vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. Refer to the Microsoft Security Update Guide for vendor-specific details.
Detection Methods for CVE-2024-29055
Indicators of Compromise
- Unexpected privilege changes or role assignments within the Defender for IoT management console
- Administrative actions performed by accounts that historically operated only at lower privilege tiers
- Anomalous authenticated API calls to Defender for IoT endpoints from internal hosts
Detection Strategies
- Monitor Defender for IoT audit logs for role modifications and configuration changes performed by non-administrator accounts
- Correlate authentication events with subsequent privileged operations to identify escalation patterns
- Baseline typical administrative activity on the Defender for IoT platform and alert on deviations
Monitoring Recommendations
- Forward Defender for IoT platform logs to a centralized SIEM for retention and correlation
- Enable alerting on new administrator account creation, permission grants, and sensor configuration changes
- Track authentication sources for privileged sessions and flag connections from unusual network segments
How to Mitigate CVE-2024-29055
Immediate Actions Required
- Apply the Microsoft security update for Defender for IoT referenced in the Microsoft Security Update Guide
- Audit all accounts with elevated privileges on Defender for IoT and remove unnecessary access
- Rotate credentials for privileged Defender for IoT accounts following patch deployment
Patch Information
Microsoft published the fix on 2024-04-09. Administrators should consult the Microsoft Security Update Guide for the specific update package matching their Defender for IoT deployment version and apply it to management consoles and sensors.
Workarounds
- Restrict network access to the Defender for IoT management console to trusted administrative subnets only
- Enforce multi-factor authentication (MFA) for all privileged Defender for IoT accounts to reduce credential compromise risk
- Apply the principle of least privilege by limiting the number of accounts holding high privileges on the platform
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
