CWE-1264: Hardware Logic with Insecure De-Synchronization between Control and Data Channels
Many high-performance on-chip bus protocols and processor data-paths employ separate channels for control and data to increase parallelism and maximize throughput. Bugs in the hardware logic that handle errors and security checks can make it possible for data to be forwarded before the completion of the security checks. If the data can propagate to a location in the hardware observable to an attacker, loss of data confidentiality can occur. 'Meltdown' is a concrete example of how de-synchronization between data and permissions checking logic can violate confidentiality requirements. Data loaded from a page marked as privileged was returned to the cpu regardless of current privilege level for performance reasons. The assumption was that the cpu could later remove all traces of this data during the handling of the illegal memory access exception, but this assumption was proven false as traces of the secret data were not removed from the microarchitectural state.
Modes of Introduction
Phase | Note |
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Architecture and Design | The weakness can be introduced in the data transfer or bus protocol itself or in the implementation. |
Implementation |
Applicable Platforms
Type | Class | Name | Prevalence |
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Language | Not Language-Specific | ||
Operating_system | Not OS-Specific | ||
Architecture | Not Architecture-Specific | ||
Technology | Not Technology-Specific |
Relationships
Common Attack Pattern Enumeration and Classification (CAPEC)
The Common Attack Pattern Enumeration and Classification (CAPECâ„¢) effort provides a publicly available catalog of common attack patterns that helps users understand how adversaries exploit weaknesses in applications and other cyber-enabled capabilities.
CAPEC at Mitre.orgCVEs Published
CVSS Severity
CVSS Severity - By Year
CVSS Base Score
# CVE | Description | CVSS | EPSS | EPSS Trend (30 days) | Affected Products | Weaknesses | Security Advisories | Exploits | PoC | Pubblication Date | Modification Date |
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# CVE | Description | CVSS | EPSS | EPSS Trend (30 days) | Affected Products | Weaknesses | Security Advisories | PoC | Pubblication Date | Modification Date |