Security readout for executives and security teams
Plain-English summary
This is a Rust dependency safety issue in the conqueue crate before 0.4.0. A queue sender was marked safe to send and share across threads regardless of the data type it carried. In affected applications, that can undermine Rust's normal thread-safety guarantees.
Executive priority
Prioritize remediation when conqueue appears in production Rust services handling concurrent workloads. Otherwise treat as dependency maintenance with normal release urgency.
Technical view
QueueSender<T> had unconditional Send and Sync implementations. That can allow QueueSender containing a non-thread-safe T to be moved or shared between threads, creating possible unsound behavior. The source bundle identifies conqueue versions before 0.4.0 as affected.
Likely exposure
Exposure is limited to Rust applications or libraries that directly or transitively depend on conqueue before 0.4.0, especially where QueueSender is used across threads.
Exploitation context
The provided sources do not show active exploitation, KEV listing, CVSS scoring, or public weaponization details. Risk depends on whether affected code paths are reachable in concurrent use.
Researcher notes
The advisory evidence is concise and does not provide CVSS, CWE mapping, or exploit confirmation. Analysis should focus on dependency reachability and concurrency usage rather than assuming remote exploitability.
Mitigation direction
- Identify any direct or transitive conqueue dependency.
- Upgrade conqueue to version 0.4.0 or later.
- Review vendor and RustSec advisory guidance before release.
- Rebuild and retest affected Rust services after dependency updates.
Validation and detection
- Check Cargo dependency manifests and lockfiles for conqueue versions before 0.4.0.
- Confirm whether QueueSender is used in multithreaded code paths.
- Run dependency vulnerability scanning against the RustSec advisory database.
- Verify updated builds no longer include affected conqueue versions.
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-2020-36437 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
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-2020-0117.htmlCVE reference · x_refsource_MISC
- https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/conqueue/RUSTSEC-2020-0117.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.