Security readout for executives and security teams
Plain-English summary
This flaw affects Rust projects using the heapless crate before 0.6.1. A cloned iterator could copy the full backing vector even after items were already consumed, creating incorrect behavior. The provided sources do not assign CVSS severity or describe active exploitation.
Executive priority
Handle during normal dependency hygiene unless the affected Rust component supports safety-critical, embedded, or high-integrity workflows. Escalate only if vulnerable heapless usage is confirmed in important runtime paths.
Technical view
CVE-2020-36464 concerns heapless IntoIter Clone behavior before version 0.6.1. The implementation cloned the entire underlying Vec without accounting for prior iterator consumption. Exposure depends on vulnerable heapless versions and code paths that clone partially consumed IntoIter instances.
Likely exposure
Likely limited to Rust applications or embedded/no_std components that depend on heapless versions before 0.6.1 and use affected iterator cloning behavior. Transitive dependencies may also introduce exposure.
Exploitation context
The source bundle provides no KEV listing, exploit report, CVSS score, CWE mapping, or real-world abuse evidence. Treat exploitation status as unknown and avoid assuming internet-reachable exploitability.
Researcher notes
The public description is narrow and lacks impact detail. Focus validation on affected crate versions and reachable IntoIter Clone usage after partial consumption. Do not infer broader product exposure from the CVE record alone.
Mitigation direction
- Upgrade heapless to version 0.6.1 or later.
- Review transitive Rust dependencies for heapless before 0.6.1.
- Check RustSec and project maintainer guidance for any additional recommendations.
- Prioritize systems where malformed iterator behavior could affect safety-critical logic.
Validation and detection
- Inspect Cargo.lock for heapless versions before 0.6.1.
- Confirm dependency resolution no longer selects vulnerable heapless releases.
- Review code for cloning partially consumed heapless IntoIter values.
- Run the project’s unit and regression tests after dependency updates.
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CVE-2020-36464 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://rustsec.org/advisories/RUSTSEC-2020-0145.htmlCVE reference · x_refsource_MISC
- https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/heapless/RUSTSEC-2020-0145.mdCVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.