CVE-2023-0200 in DGX-2
Summary
by MITRE • 04/22/2023
NVIDIA DGX-2 contains a vulnerability in OFBD where a user with high privileges and a pre-conditioned heap can cause an access beyond a buffers end, which may lead to code execution, escalation of privileges, denial of service, and information disclosure.
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Analysis
by VulDB Data Team • 05/15/2023
The vulnerability identified as CVE-2023-0200 resides within the NVIDIA DGX-2 system's OFBD component, representing a critical heap-based buffer overflow condition that demonstrates the intersection of privilege escalation and memory corruption risks. This vulnerability specifically manifests in the context of high-privilege user execution environments where pre-conditioned heap states create opportunities for exploitation. The OFBD module, which typically handles firmware and boot processes, becomes a vector for attackers who can manipulate memory structures to achieve unauthorized code execution. The flaw stems from inadequate bounds checking mechanisms within the heap management routines, allowing attackers to write beyond allocated buffer boundaries and potentially overwrite critical memory regions. This vulnerability aligns with CWE-121, heap-based buffer overflow, and represents a significant concern for systems requiring high security assurances. The attack surface expands when considering that the exploitation requires a user with elevated privileges, yet the pre-conditioned heap state suggests that the vulnerability may be more accessible than initially apparent, particularly in environments where heap manipulation techniques are well-understood.
The technical exploitation of CVE-2023-0200 leverages the fundamental principle of heap memory corruption to achieve unauthorized system access. When a high-privilege user executes specific operations within the OFBD context, the heap state becomes preconditioned in a manner that allows for controlled buffer overflows. The vulnerability exploits the relationship between heap allocation and memory layout, where attackers can manipulate heap metadata or adjacent memory regions to achieve code execution. This type of vulnerability operates under the ATT&CK framework's T1068, legitimate credentials and user privileges, and T1059, command and scripting interpreter, as it requires legitimate access but enables further malicious activities. The buffer overflow mechanism can be triggered through specific input sequences or memory operations that cause the heap allocator to place data beyond the intended buffer boundaries, potentially allowing attackers to overwrite function pointers, return addresses, or other critical control structures within the heap memory space.
The operational impact of CVE-2023-0200 extends beyond simple privilege escalation to encompass comprehensive system compromise capabilities. Successful exploitation can result in full system control, allowing attackers to execute arbitrary code with the highest system privileges, effectively bypassing security controls and access restrictions. The vulnerability's potential for denial of service operations means that even unsuccessful exploitation attempts could destabilize the system, rendering it unavailable to legitimate users and creating operational disruptions. Information disclosure represents another significant concern, as heap corruption can expose sensitive memory contents including cryptographic keys, authentication tokens, and system configuration data. The combined effects of code execution, privilege escalation, denial of service, and information disclosure create a multi-faceted threat that can severely impact enterprise security postures. Organizations deploying NVIDIA DGX-2 systems must consider the cascading effects of this vulnerability, as it could enable attackers to establish persistent access, exfiltrate sensitive data, or disrupt critical computational operations that depend on these high-performance systems.
Mitigation strategies for CVE-2023-0200 must address both immediate defensive measures and long-term architectural improvements. The most effective immediate solution involves applying NVIDIA's official security patches and firmware updates that address the specific heap management issues within the OFBD component. System administrators should implement strict access controls and privilege separation mechanisms to limit the potential impact of compromised high-privilege accounts. Network segmentation and monitoring solutions should be deployed to detect anomalous behavior patterns that might indicate exploitation attempts. The vulnerability's characteristics suggest that runtime protections such as stack canaries, address space layout randomization, and heap hardening techniques should be considered as additional defensive layers. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in related system components, particularly those handling heap-based memory operations. Organizations should also implement comprehensive incident response procedures that account for the potential for code execution and privilege escalation scenarios, ensuring that security teams can respond effectively to exploitation attempts. The remediation process should include thorough testing of patches in controlled environments before deployment to production systems to avoid introducing additional operational disruptions.