CVE-2024-29013 in SonicOS
Summary
by MITRE • 06/20/2024
Heap-based buffer overflow vulnerability in the SonicOS SSL-VPN allows an authenticated remote attacker to cause Denial of Service (DoS) via memcpy function.
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Analysis
by VulDB Data Team • 08/20/2024
The heap-based buffer overflow vulnerability identified as CVE-2024-29013 resides within SonicOS SSL-VPN implementations, representing a critical security flaw that enables authenticated remote attackers to execute denial of service attacks. This vulnerability specifically manifests through improper memory handling within the memcpy function, creating conditions where malicious input can overwrite adjacent heap memory regions. The affected SonicOS SSL-VPN systems process user-supplied data through vulnerable code paths that fail to validate input boundaries before performing memory copy operations. Such inadequate input validation creates opportunities for attackers to manipulate heap memory layout and potentially execute arbitrary code or cause system instability. The vulnerability demonstrates characteristics consistent with CWE-121 heap-based buffer overflow, where insufficient bounds checking allows attackers to write beyond allocated memory buffers. This flaw directly impacts the availability and integrity of SSL-VPN services, as successful exploitation can lead to complete service disruption and system crashes. The authenticated nature of the attack means that adversaries must first establish valid credentials, typically through legitimate user accounts or compromised authentication tokens, before attempting exploitation. Attackers can leverage this vulnerability to consume excessive system resources, cause memory corruption, or trigger application crashes that result in sustained denial of service conditions for legitimate users.
The operational impact of CVE-2024-29013 extends beyond simple service disruption, as it represents a fundamental weakness in the memory management subsystem of SonicOS SSL-VPN implementations. When exploited, this vulnerability can cause cascading failures throughout the network infrastructure, particularly affecting remote access capabilities that organizations rely upon for business continuity. The heap memory corruption can lead to unpredictable application behavior, including segmentation faults, application crashes, and potential system reboots that can last for extended periods. Organizations utilizing SonicOS SSL-VPN services face significant operational risks as this vulnerability can be exploited by both internal and external threat actors with legitimate access credentials. The vulnerability's exploitation requires minimal technical expertise, making it particularly dangerous as it can be leveraged by threat actors with varying skill levels. Network administrators must consider the potential for extended downtime and service degradation when addressing this vulnerability, as heap corruption can be particularly challenging to diagnose and remediate. The attack surface is further expanded by the fact that SSL-VPN services typically provide access to critical internal network resources, making successful exploitation potentially devastating for organizational security posture.
Mitigation strategies for CVE-2024-29013 must address both immediate defensive measures and long-term architectural improvements to prevent similar vulnerabilities from emerging in future implementations. Organizations should prioritize applying vendor-provided patches and firmware updates as soon as they become available, as these typically contain memory boundary checks and input validation improvements that directly address the vulnerable memcpy operations. Network segmentation and access controls should be implemented to limit the blast radius of potential exploitation, ensuring that even if an attacker gains access to one system, they cannot easily move laterally through the network. Monitoring systems should be enhanced to detect unusual memory allocation patterns or application crashes that may indicate exploitation attempts, particularly focusing on SSL-VPN service logs and system resource utilization metrics. Security teams should implement regular vulnerability assessments and penetration testing to identify similar memory handling flaws in other network components and applications. The implementation of runtime protection mechanisms such as heap canaries, address space layout randomization, and stack canaries can provide additional defense in depth. Additionally, organizations should conduct regular security training for administrators to recognize potential exploitation indicators and establish incident response procedures specifically tailored to address heap-based buffer overflow vulnerabilities. Compliance with industry standards such as those defined in the mitre ATT&CK framework, particularly the privilege escalation and defense evasion techniques, should inform the development of comprehensive security policies. The vulnerability highlights the importance of following secure coding practices and implementing automated code review processes that specifically target memory safety issues, ensuring that future implementations adhere to established security guidelines and reduce the likelihood of similar flaws occurring in other network infrastructure components.