CVE-2024-33029 in Snapdragon Auto
Summary
by MITRE • 11/04/2024
Memory corruption while handling the PDR in driver for getting the remote heap maps.
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Analysis
by VulDB Data Team • 11/04/2024
This vulnerability represents a critical memory corruption issue within a device driver responsible for retrieving remote heap maps through PDR (Presentation Data Representation) handling mechanisms. The flaw manifests during the processing of PDR data structures which are typically used in communication protocols to represent and transmit data between different system components. The memory corruption occurs specifically when the driver attempts to manage heap map information from remote systems, suggesting that the vulnerability may be exploited through remote code execution or system instability. This type of vulnerability falls under the category of memory safety issues that can lead to arbitrary code execution or denial of service conditions.
The technical implementation of this vulnerability stems from improper memory management during PDR data processing operations. When the driver receives and processes heap map information from remote sources, it likely performs operations such as buffer allocations, data copying, or memory mapping without adequate bounds checking or validation. The PDR handling mechanism may not properly validate the size or structure of incoming data, leading to potential buffer overflows, use-after-free conditions, or other memory corruption scenarios. This memory corruption can result in the overwrite of critical memory regions including function pointers, return addresses, or control structures that govern the driver's execution flow. The vulnerability is particularly concerning because it operates at the kernel level within a device driver, providing potential attackers with privileged execution capabilities that could compromise the entire system.
The operational impact of this vulnerability extends beyond simple system instability to potentially enable full system compromise. An attacker who can successfully exploit this memory corruption could gain elevated privileges and execute arbitrary code within the kernel context, effectively bypassing standard operating system security mechanisms. The remote heap map retrieval functionality suggests that this vulnerability may be exploitable over network connections, making it particularly dangerous in environments where device drivers communicate with external systems. The memory corruption could manifest as system crashes, hangs, or more insidiously as silent data corruption that allows for persistent backdoor access. This vulnerability aligns with common attack patterns documented in the attack framework where memory corruption flaws are frequently leveraged for privilege escalation and persistent system compromise, potentially mapping to techniques described in the attack tactic of privilege escalation.
Mitigation strategies for this vulnerability should focus on both immediate defensive measures and long-term architectural improvements. Immediate remediation efforts should include implementing proper bounds checking and input validation for all PDR data handling operations, ensuring that heap map information is properly validated before processing. The driver should employ modern memory safety techniques such as stack canaries, address space layout randomization, and control flow integrity checks to prevent exploitation. Additionally, implementing proper error handling and graceful degradation mechanisms can help prevent the system from crashing when malformed PDR data is received. Organizations should also consider applying patches or firmware updates as soon as they become available, while implementing network segmentation and access controls to limit exposure. The vulnerability demonstrates the importance of secure coding practices in kernel space operations and aligns with common security recommendations for device driver development that emphasize memory safety and input validation as fundamental requirements. This type of flaw is particularly relevant to the common weakness enumeration category of cwe-121 which addresses stack-based buffer overflow conditions and cwe-787 which covers out-of-bounds write vulnerabilities, both of which are common manifestations of memory corruption issues in driver code.