Security readout for executives and security teams
Plain-English summary
This vulnerability affects the Rust tremor-script crate before 0.11.6. When certain patch operations are processed, the crate may use memory after it has been freed. The public sources do not provide severity scoring, affected deployments, or evidence of exploitation.
Executive priority
Treat this as a dependency hygiene issue unless internal exposure is confirmed. Prioritize inventory and upgrade where tremor-script is present, but do not assume emergency incident response without evidence of use or exploitation.
Technical view
CVE-2021-45701 is a use-after-free condition in tremor-script before 0.11.6 related to patch operation handling. The sources identify the fixed boundary as 0.11.6 but do not include CVSS, CWE, proof-of-concept details, or operational impact specifics.
Likely exposure
Exposure is likely limited to Rust projects that include tremor-script before 0.11.6, directly or transitively. Organizations should verify dependency manifests and lockfiles rather than assuming only first-party code is relevant.
Exploitation context
The provided sources do not state active exploitation, and the CVE is not listed as KEV in the bundle. Public evidence here is limited to advisory-level description, so exploitability and real-world prevalence are not established.
Researcher notes
The source bundle gives a concise memory-safety description but lacks CVSS, CWE mapping, exploit status, and impact details. Analysis should stay bounded to tremor-script before 0.11.6 and the patch-operation use-after-free condition.
Mitigation direction
- Upgrade tremor-script to version 0.11.6 or later.
- Check vendor and RustSec guidance for any additional remediation notes.
- Rebuild and redeploy affected Rust services after dependency updates.
- Review transitive dependency paths that may pin an older tremor-script release.
Validation and detection
- Inspect Cargo.toml and Cargo.lock for tremor-script versions below 0.11.6.
- Run dependency auditing against RustSec advisory RUSTSEC-2021-0111.
- Confirm production build artifacts use the remediated dependency version.
- Check SBOMs for tremor-script across deployed Rust applications.
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-2021-45701 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-2021-0111.htmlCVE reference · x_refsource_MISC
- https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/tremor-script/RUSTSEC-2021-0111.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.