CVE-2024-37310 in EVerest
Summary
by MITRE • 07/10/2024
EVerest is an EV charging software stack. An integer overflow in the "v2g_incoming_v2gtp" function in the v2g_server.cpp implementation can allow a remote attacker to overflow the process' heap. This vulnerability is fixed in 2024.3.1 and 2024.6.0.
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Analysis
by VulDB Data Team • 07/11/2024
The EVerest EV charging software stack represents a critical component in modern electric vehicle infrastructure, serving as the foundational software framework for communication between charging stations and vehicles. This vulnerability exists within the v2g_server.cpp implementation where the "v2g_incoming_v2gtp" function processes incoming messages from vehicles. The integer overflow occurs when processing data structures that exceed the maximum value that can be represented by the integer type used in the function, creating a condition where memory allocation calculations become invalid. This flaw specifically targets heap memory management within the process, potentially allowing attackers to manipulate memory layout and execute arbitrary code. The vulnerability affects the core communication protocol implementation that governs vehicle-to-grid interactions, making it particularly dangerous in operational charging environments where security is paramount.
The technical exploitation of this integer overflow vulnerability follows a classic pattern where an attacker crafts malicious input data that causes the integer calculation to wrap around to a much smaller value than expected. When the system attempts to allocate heap memory based on this manipulated integer value, it creates a situation where insufficient memory is allocated for the actual data being processed, leading to memory corruption. This memory corruption can be leveraged to overwrite adjacent memory locations, potentially allowing attackers to execute code or cause denial of service conditions. The vulnerability is classified as a CWE-190 integer overflow, which is a well-documented weakness in software security that has been exploited in numerous systems. The specific implementation flaw in v2g_server.cpp demonstrates poor input validation and inadequate bounds checking in memory allocation routines.
The operational impact of this vulnerability extends beyond simple memory corruption, as it affects the fundamental security posture of EV charging infrastructure. Remote attackers could potentially exploit this vulnerability to gain unauthorized access to charging station systems, manipulate charging sessions, or disrupt service availability. In environments where charging stations are connected to critical infrastructure or where financial transactions occur, this vulnerability could lead to significant operational disruptions and potential financial losses. The vulnerability's remote exploitability means that attackers do not require physical access to the charging equipment, making it particularly concerning for large-scale deployments. Security professionals should consider this vulnerability as part of their broader threat modeling efforts, particularly when assessing the attack surface of connected charging infrastructure. The fix implemented in versions 2024.3.1 and 2024.6.0 demonstrates the importance of proper integer overflow protection in security-critical code.
Mitigation strategies for this vulnerability should include immediate deployment of the patched versions 2024.3.1 or 2024.6.0, along with comprehensive network segmentation of charging infrastructure to limit potential attack vectors. Organizations should implement monitoring solutions that detect anomalous memory allocation patterns and unusual communication behavior from charging stations. The vulnerability highlights the importance of input validation and bounds checking in all memory management operations, particularly in systems handling sensitive communications. Security teams should also consider implementing runtime protections such as address space layout randomization and stack canaries to provide additional defense in depth. Regular security assessments of charging infrastructure software should include review of integer handling and memory management routines to identify similar vulnerabilities. The ATT&CK framework categorizes this type of vulnerability under T1059 command and scripting interpreter and T1210 exploitation of remote services, emphasizing the need for both perimeter and internal network security controls.