CVE-2024-32632 in Falcon
Summary
by MITRE • 04/16/2024
A value in ATCMD will be misinterpreted by printf, causing incorrect output and possibly out-of-bounds memory access
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Analysis
by VulDB Data Team • 12/10/2025
This vulnerability exists within the ATCMD processing functionality where a specific value is improperly handled by the printf family of functions, leading to potential security implications. The flaw occurs when printf encounters a particular input value that it interprets incorrectly, causing the function to process memory locations beyond the intended buffer boundaries. This misinterpretation can result in information disclosure through unintended memory content exposure or more severe outcomes including arbitrary code execution via controlled out-of-bounds memory access. The vulnerability is classified under CWE-121 as a stack-based buffer overflow, though the specific mechanism involves printf format string handling rather than traditional buffer overflows. This type of vulnerability falls within the ATT&CK technique T1059.007 for command and script injection, where improper input validation allows for malicious payload execution through command processing interfaces. The ATCMD functionality typically operates in embedded systems or telecommunications environments where printf is commonly used for logging or output formatting, making this a critical issue in device management and security contexts.
The technical implementation of this vulnerability involves printf's format string processing where the malicious value contains format specifiers that are not properly escaped or validated before being passed to the printf function. When printf processes these unvalidated format specifiers, it attempts to read additional parameters from the stack or memory locations that correspond to the format string arguments, potentially accessing memory regions outside the intended data buffers. This misinterpretation can occur when user-supplied data is directly incorporated into printf format strings without proper sanitization or when the system fails to validate that the input data does not contain format string directives. The vulnerability is particularly concerning in embedded systems where memory corruption can lead to system instability, privilege escalation, or complete system compromise, as printf is a fundamental function used throughout system logging and output processing routines.
The operational impact of this vulnerability extends beyond simple output corruption, as it represents a potential pathway for attackers to gain unauthorized access to system resources. An attacker who can control the ATCMD input values may exploit this vulnerability to read sensitive memory locations, potentially extracting passwords, cryptographic keys, or other confidential information stored in adjacent memory regions. The out-of-bounds memory access could also be leveraged to overwrite critical memory locations, leading to denial of service conditions or more sophisticated attacks such as code execution. This vulnerability is particularly dangerous in networked devices or communication systems where ATCMD interfaces are exposed to external attackers or where privilege escalation opportunities exist within the system architecture. The impact is amplified when the affected system processes user input through ATCMD without proper input validation or sanitization mechanisms in place.
Mitigation strategies for this vulnerability should focus on preventing format string injection attacks through proper input validation and sanitization. The most effective approach involves using safe string formatting functions such as snprintf instead of printf, or ensuring that all user-supplied input values are properly escaped or validated before being processed by printf functions. Implementing proper access controls and input validation mechanisms at the ATCMD interface level can significantly reduce the attack surface. System administrators should also consider implementing runtime protections such as stack canaries, address space layout randomization, and data execution prevention techniques to limit the impact if exploitation occurs. Additionally, regular security audits and code reviews focusing on printf usage patterns can help identify similar vulnerabilities in other parts of the system. The vulnerability demonstrates the importance of following secure coding practices as outlined in OWASP Top Ten and ISO 27001 security standards, particularly in embedded system development where traditional security mitigations may not be sufficient. Organizations should also implement monitoring and logging mechanisms to detect potential exploitation attempts through unusual printf behavior or memory access patterns.