Security readout for executives and security teams
Plain-English summary
CVE-2020-36466 is a Rust crate safety issue in cgc through 2020-12-10. The crate marks a pointer type as safe to send and share across threads for all data types, which can undermine Rust's normal thread-safety protections. Business urgency depends on whether this crate is used in production code.
Executive priority
Treat this as a targeted dependency-risk review, not an emergency, unless cgc is present in critical Rust services. The available evidence lacks severity scoring, exploitation evidence, and a named patch, so priority should be based on confirmed usage and business criticality.
Technical view
The source states that cgc's Ptr implements Send and Sync for all types. That is an unsafe trait contract issue: non-thread-safe values may be treated as thread-safe, potentially enabling undefined behavior or data races in dependent Rust applications. No CVSS, CWE, affected CPE, patch version, or exploit details are provided.
Likely exposure
Exposure is limited to Rust projects that directly or transitively depend on the cgc crate versions through 2020-12-10. The bundle does not identify platforms, packaged products, or runtime services using the crate.
Exploitation context
The CVE is not listed as KEV, and the provided sources do not state active exploitation or public exploit availability. Practical impact likely requires a dependent application path that uses cgc::Ptr across thread-safety boundaries.
Researcher notes
Evidence is sparse. The key technical fact is an unconditional Send and Sync implementation for Ptr. Analyze dependent code for unsafe cross-thread aliasing and synchronization assumptions. Do not claim exploitability without application-specific proof.
Mitigation direction
- Check RustSec advisory guidance for any patched, yanked, or replacement version.
- Inventory direct and transitive use of the cgc crate.
- Remove or replace cgc where no maintained fix is available.
- Avoid sharing cgc Ptr values across threads unless reviewed for soundness.
- Prioritize applications handling sensitive or concurrent state.
Validation and detection
- Search Rust dependency manifests and lockfiles for cgc.
- Confirm whether any dependency version is through 2020-12-10.
- Review code paths using cgc Ptr in concurrent contexts.
- Check RustSec and dependency-audit output for RUSTSEC-2020-0148.
- Document whether exposure is direct, transitive, or not present.
Public sources used
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2020-36466 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-2020-0148.htmlCVE reference · x_refsource_MISC
- https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/cgc/RUSTSEC-2020-0148.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.