CVE-2024-7545 in oFono
Summary
by MITRE • 08/06/2024
oFono SimToolKit Heap-based Buffer Overflow Privilege Escalation Vulnerability. This vulnerability allows local attackers to execute arbitrary code on affected installations of oFono. An attacker must first obtain the ability to execute code on the target modem in order to exploit this vulnerability.
The specific flaw exists within the parsing of STK command PDUs. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-23458.
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Analysis
by VulDB Data Team • 03/06/2025
The CVE-2024-7545 vulnerability represents a critical heap-based buffer overflow in the oFono SimToolKit implementation that demonstrates a classic privilege escalation vector through improper input validation. This vulnerability specifically targets the parsing of STK command PDUs within the telecommunications modem management framework, creating a pathway for local attackers to gain elevated privileges on affected systems. The flaw resides in the fundamental data handling process where user-supplied data undergoes insufficient length validation before being copied into heap-based buffers, establishing a direct avenue for memory corruption that can be exploited to execute arbitrary code.
The technical implementation of this vulnerability aligns with CWE-121, which describes heap-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations. The attack vector requires an initial compromise of the target modem environment, as attackers must first establish code execution capabilities on the modem itself before leveraging the buffer overflow to escalate privileges. This prerequisite demonstrates the layered nature of modern exploitation scenarios where initial access is necessary to reach the privilege escalation phase, with the vulnerability acting as a critical stepping stone in the attack chain.
From an operational perspective, this vulnerability poses significant risks to telecommunications infrastructure and mobile device security, particularly in environments where oFono is deployed for modem management and SIM card operations. The impact extends beyond simple code execution to potential complete system compromise, as the vulnerability allows execution in the context of the service account, which typically operates with elevated privileges. This creates a substantial risk for organizations relying on oFono for modem communication management, as successful exploitation could lead to unauthorized access to sensitive telecommunications data and potential network disruption.
The ATT&CK framework categorizes this vulnerability under privilege escalation techniques, specifically leveraging memory corruption vulnerabilities to gain elevated system privileges. The attack pattern follows a typical exploitation sequence where initial access is gained through modem compromise, followed by the buffer overflow exploitation to achieve privilege escalation. Organizations should consider implementing mitigations such as input validation controls, heap memory protection mechanisms, and regular security updates to address this vulnerability. The ZDI-CAN-23458 reference indicates this vulnerability has been formally recognized and tracked by the Zero Day Initiative, emphasizing its significance in the cybersecurity landscape and the need for prompt remediation across affected deployments.