CWE-1421: Exposure of Sensitive Information in Shared… | Glexia
CWE-1421 (Exposure of Sensitive Information in Shared Microarchitectural Structures during Transient Execution) weakness overview with consequences, detection…
Glexia's Take · Automated analysis
CWE-1421: Exposure of Sensitive Information in Shared Microarchitectural Structures during Transient Execution
Exposure of Sensitive Information in Shared Microarchitectural Structures during Transient Execution represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Executive Impact
- Confidentiality: Read Memory:
Developer Pattern
CWE-1421 is the kind of defect developers can usually prevent with explicit validation, safer framework defaults, and tests that exercise hostile input or unsafe state transitions.
Automation confidence
high confidence from CWE-1421, 4.20.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Official CWE Definition
CWE-1421: Exposure of Sensitive Information in Shared Microarchitectural Structures during Transient Execution
A processor event may allow transient operations to access architecturally restricted data (for example, in another address space) in a shared microarchitectural structure (for example, a CPU cache), potentially exposing the data over a covert channel.
Developer And Remediation Guidance
How teams prevent and detect this weakness
Causes
- Missing validation
- Unsafe defaults
- Insufficient authorization or memory-safety invariant
Remediation
- Architecture and Design:
- Build and Compilation:
- Implementation:
- System Configuration:
- Patching and Maintenance:
- Requirements:
Detection
- Manual Analysis:
- Automated Analysis:
- Fuzzing: Academic researchers have demonstrated that this weakness can be detected in hardware using software fuzzing tools that treat the underlying hardware as a black box ([REF-1406], [REF-1430])
Mappings
Related CVEs, CWEs, and ATT&CK context
Related CWEs
ATT&CK Relevance
ATT&CK relevance is shown only when reviewed or responsibly inferred.