Security readout for executives and security teams
Plain-English summary
This is a Rust library safety issue in multiqueue. The crate marks several internal sender and receiver structures as safe to move between threads without enforcing Rust's usual Send requirements. In dependent applications, that can weaken thread-safety guarantees and may lead to memory-safety failures. Sources do not provide CVSS, CWE, or a patched version.
Executive priority
Treat this as a dependency hygiene and Rust memory-safety review item. Urgency is moderate unless the crate appears in critical, exposed, or safety-sensitive services. The source data is insufficient to justify emergency response.
Technical view
CVE-2020-36463 concerns unconditional Send implementations for InnerSend<RW,T>, InnerRecv<RW,T>, FutInnerSend<RW,T>, and FutInnerRecv<RW,T> in the multiqueue crate through 2020-12-25. The issue is dependency-level Rust unsoundness, not a named product vulnerability in the source bundle.
Likely exposure
Exposure is most likely in Rust applications or services that include the multiqueue crate, directly or transitively, at versions covered through 2020-12-25. The source bundle lists no CPEs, vendors, products, or deployment environments.
Exploitation context
The bundle does not report active exploitation and CVE is not marked KEV. No public exploit status is provided. Practical impact depends on whether affected multiqueue types are reachable in application code and whether unsafe cross-thread type movement can be triggered.
Researcher notes
Key evidence is the unconditional Send implementation statement. The bundle lacks CVSS, CWE, proof-of-exploit, affected version ranges beyond date wording, and explicit remediation. Avoid expanding scope beyond multiqueue without dependency evidence.
Mitigation direction
- Inventory Rust projects for direct or transitive multiqueue dependency use.
- Check RustSec and maintainer guidance for patched versions or replacement recommendations.
- Prioritize applications where multiqueue handles untrusted or cross-thread data flows.
- If no fix is available, evaluate replacing or removing the dependency.
Validation and detection
- Inspect dependency manifests and lockfiles for the multiqueue crate.
- Confirm whether detected versions fall within the through-2020-12-25 affected window.
- Review whether affected queue paths are used across threads.
- Record scanner findings against RUSTSEC-2020-0143 and CVE-2020-36463.
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
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CVE-2020-36463 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-2020-0143.htmlCVE reference · x_refsource_MISC
- https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/multiqueue/RUSTSEC-2020-0143.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.