CVE-2023-33060 in 7c Compute Platform SC7180-AC
Summary
by MITRE • 02/06/2024
Transient DOS in Core when DDR memory check is called while DDR is not initialized.
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Analysis
by VulDB Data Team • 07/08/2026
This vulnerability represents a transient denial of service condition within the core processing subsystem that occurs specifically when memory validation routines are invoked before the dynamic dual-rate memory initialization sequence has completed. The flaw manifests as a system-wide operational failure when the core attempts to perform memory integrity checks on uninitialized DDR memory regions, leading to immediate system hang or crash conditions. The vulnerability is classified under CWE-665 as improper initialization of a resource, specifically affecting memory management subsystems during critical boot phases where hardware initialization sequences have not yet reached completion.
The technical implementation involves the core processor attempting to execute memory validation routines that require proper DDR memory controller initialization before accessing memory banks. When this sequence is violated, the processor enters an unrecoverable state where memory access operations fail catastrophically, causing the entire system to become unresponsive. This condition typically occurs during early boot phases or when memory subsystems are reset without proper sequencing protocols being followed. The vulnerability demonstrates characteristics consistent with improper resource state management and timing dependencies in hardware initialization sequences.
The operational impact of this transient denial of service extends beyond simple system crashes to include complete loss of operational capability during critical system states. Systems utilizing affected core processors may experience extended downtime during boot cycles, memory reinitialization events, or when recovering from memory subsystem errors. The vulnerability can be exploited to cause system instability in environments where memory validation is performed automatically during system recovery operations. This creates a significant risk for embedded systems, industrial control environments, and mission-critical applications where uninterrupted operation is essential.
Mitigation strategies must address both the immediate hardware-level issues and broader system design considerations. The primary approach involves implementing proper initialization sequencing protocols that ensure DDR memory controllers are fully initialized before memory validation routines are executed. System designers should implement watchdog timers and recovery mechanisms to detect and recover from such transient states automatically. Additionally, firmware updates should enforce strict ordering requirements for memory initialization sequences and include proper error handling for cases where memory validation is attempted prematurely. The vulnerability highlights the importance of following ATT&CK technique T1499.004 for system recovery and ATT&CK technique T1562.001 for privilege escalation prevention in memory management contexts. Organizations should also implement comprehensive testing procedures that validate proper initialization sequences under various operational conditions to prevent exploitation of this transient denial of service condition.