CVE-2025-27030 in Snapdragon Auto
Summary
by MITRE • 09/24/2025
information disclosure while invoking calibration data from user space to update firmware size.
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Analysis
by VulDB Data Team • 09/24/2025
This vulnerability represents a critical information disclosure flaw that occurs during the firmware update process when calibration data is accessed from user space. The issue manifests when the system attempts to invoke calibration data to determine firmware size, creating an unintended data exposure channel. The vulnerability stems from insufficient access controls and validation mechanisms that allow unauthorized information retrieval during firmware operations. Attackers can exploit this weakness to extract sensitive calibration parameters, system configuration details, or other proprietary firmware-related data that should remain protected within kernel space. This type of information disclosure can provide adversaries with valuable insights into the device's internal structure, firmware versions, and calibration settings that could be leveraged for subsequent attacks.
The technical implementation of this vulnerability involves improper handling of calibration data transfer between user space and kernel space components during firmware size determination processes. When the system invokes calibration data from user space, it fails to properly sanitize or restrict access to sensitive information that may be inadvertently exposed through the firmware size calculation mechanism. This flaw typically occurs in embedded systems, IoT devices, or firmware update frameworks where user space applications interact with kernel-level firmware management functions. The vulnerability is particularly concerning because it operates at the boundary between user and kernel space, where privilege escalation opportunities often exist. The flaw can be categorized under CWE-200 Information Exposure, which specifically addresses situations where sensitive information is disclosed to unauthorized entities.
The operational impact of this vulnerability extends beyond simple information disclosure to potentially enable more sophisticated attack vectors. An attacker who successfully exploits this vulnerability could gather calibration data that reveals system configurations, hardware specifications, or firmware version information that would otherwise be protected. This information could be used to tailor subsequent attacks, identify specific device models, or develop targeted exploits against known firmware vulnerabilities. The exposure of calibration data may also reveal implementation details that could aid in bypassing security controls or understanding the device's internal security mechanisms. In environments where firmware updates are frequently performed, this vulnerability could provide attackers with continuous access to calibration information that could be used to maintain persistence or escalate privileges.
Mitigation strategies for this vulnerability should focus on implementing robust access controls and data sanitization mechanisms at the user-kernel interface. System administrators should ensure that firmware update processes enforce strict privilege separation and that calibration data is properly validated and restricted before being exposed to user space applications. The implementation of proper input validation and output sanitization techniques can prevent unauthorized information leakage during firmware size calculations. Organizations should also consider implementing kernel-level protections that monitor and restrict access to sensitive calibration data during firmware operations. Additionally, regular firmware updates and security patches should be deployed to address known vulnerabilities in firmware management components. The mitigation approach should align with defensive security practices outlined in the ATT&CK framework under the T1068 privilege escalation techniques, specifically addressing the exploitation of system vulnerabilities to gain unauthorized access to sensitive information. System hardening measures including disabling unnecessary firmware update interfaces and implementing secure boot processes can further reduce the attack surface and prevent exploitation of this information disclosure vulnerability.