CVE-2026-82017 in IGEL
Summary
by MITRE • 08/29/2026
IGEL OS 12 before 12.7.6 and IGEL OS 11 before 11.11.150 contain a boot registry parameter injection vulnerability that allows attackers with physical access to execute arbitrary Linux loader parameters by writing to an unencrypted and unsigned configuration area read by the signed bootloader. Attackers can inject malicious kernel command line parameters that execute with boot environment privileges without triggering TPM PCR measurement failures, as the attack does not modify the measured boot code.
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Analysis
by VulDB Data Team • 08/29/2026
The vulnerability identified in IGEL OS versions prior to 12.7.6 and 11.11.150 represents a critical failure in the secure boot chain integrity, specifically targeting the interaction between the bootloader configuration storage and the signed bootloader itself. This flaw allows an attacker with physical access to the device to bypass standard security controls by injecting arbitrary Linux loader parameters into the system during the initialization phase. The core technical issue lies in the design of the configuration area used for storing boot settings; this specific region is neither encrypted nor digitally signed, yet it is directly read and processed by the bootloader which operates under a trusted execution context established by the hardware root of trust. Because the configuration data lacks cryptographic verification mechanisms such as digital signatures or integrity checks before being passed to the kernel, an adversary can modify these parameters without invalidating the boot chain's measured state.
From a technical perspective, this vulnerability exploits the separation between the measurement of executable code and the validation of its associated configuration data. In a properly secured environment using technologies like TPM-based secure boot, any modification to the boot process should result in a change to the Platform Configuration Register (PCR) measurements, thereby triggering a failure if those changes are not authorized by trusted keys. However, because this vulnerability involves writing to an unencrypted and unsigned area that is consumed after the initial code measurement phase, the TPM PCR values remain unchanged despite the injection of malicious parameters. This effectively neutralizes one of the primary defenses against tampering during the boot process, allowing attackers to alter system behavior without triggering integrity violations or preventing the operating system from loading successfully.
The operational impact of this flaw is severe for environments relying on IGEL OS for thin client deployments and secure endpoint management. An attacker with physical access can inject malicious kernel command line parameters that execute with high-level privileges inherent to the boot environment. This capability enables a range of hostile actions, including disabling security modules such as SELinux or AppArmor, loading unauthorized kernel modules, redirecting system logs to exfiltrate sensitive data, or establishing persistent backdoors that survive reboots and standard recovery procedures. Since the attack does not modify the measured boot code, traditional integrity monitoring tools may fail to detect the compromise during the initial startup sequence, making detection difficult without specialized runtime analysis or hardware-level attestation checks that specifically validate configuration parameters alongside binary executables.
This vulnerability aligns with CWE-284 Improper Access Control and CWE-359 Existential Risk of Tampering in Secure Boot processes, as it demonstrates a failure to enforce integrity constraints on critical system inputs. In the context of the MITRE ATT&CK framework, this technique corresponds to T1068 Exploitation for Privilege Escalation via bootkit mechanisms and potentially T1542 Pre-OS Boot Compromise. The ability to manipulate kernel parameters from a low-level position allows attackers to establish persistence and elevate privileges before user-space security controls are fully initialized. To mitigate this risk, organizations must upgrade immediately to IGEL OS 12.7.6 or later for version 12 users, and IGEL OS 11.11.150 or later for version 11 users, as these releases address the configuration area validation flaws. Additionally, administrators should enforce strict physical access controls using chassis intrusion switches and secure lock mechanisms to prevent unauthorized interaction with hardware ports where such modifications could be performed. Implementing full disk encryption combined with TPM-backed key protection further reduces the attack surface by ensuring that even if boot parameters are altered, the underlying data remains inaccessible without proper authentication credentials tied to the trusted platform module.