Security readout for executives and security teams
Plain-English summary
This CVE affects Rust projects using the nanorand crate before 0.6.1. A thread-local random generator implementation could create multiple mutable references to the same object, breaking Rust’s safety guarantees. The business urgency depends on whether vulnerable versions are present in production dependency trees.
Executive priority
Prioritize inventory and routine remediation for Rust services. Escalate only if vulnerable nanorand versions are found in security-sensitive or internet-facing production workloads.
Technical view
The issue is in nanorand’s TlsWyRand Deref implementation, which dereferences a raw pointer and can produce aliasing mutable references. Sources do not provide CVSS, CWE, affected downstream products, or exploit evidence. The stated affected range is nanorand before 0.6.1.
Likely exposure
Exposure is likely limited to Rust applications or libraries that directly or transitively depend on nanorand versions before 0.6.1. The CVE data does not identify specific products, services, or deployment patterns.
Exploitation context
The provided sources do not report active exploitation, public exploit use, or CISA KEV listing. Treat this as a dependency safety issue requiring inventory and upgrade validation, not as confirmed exploited-in-the-wild activity.
Researcher notes
Evidence is sparse: no CVSS, CWE, exploit status, or downstream product list is provided. The key technical issue is Rust unsoundness from raw-pointer dereferencing in TlsWyRand’s Deref implementation, fixed by the pre-0.6.1 affected boundary.
Mitigation direction
- Identify direct and transitive nanorand dependencies in Rust projects.
- Upgrade nanorand to version 0.6.1 or later where present.
- Review RustSec guidance before accepting any alternative mitigation.
- Rebuild and redeploy affected applications after dependency updates.
Validation and detection
- Check dependency manifests and lockfiles for nanorand below 0.6.1.
- Confirm dependency resolution no longer selects vulnerable nanorand versions.
- Run the project’s unit and integration tests after upgrading.
- Document any remaining vulnerable transitive dependency and its owner.
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-2021-45705 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-2021-0114.htmlCVE reference · x_refsource_MISC
- https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/nanorand/RUSTSEC-2021-0114.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.