Security readout for executives and security teams
Plain-English summary
This CVE affects the Rust http crate before 0.1.20. A bug in how header-map capacity is reserved can overflow an integer and cause denial of service, such as an infinite loop. The sources do not show remote code execution or confirmed active exploitation.
Executive priority
Treat this as a dependency hygiene and service availability issue. Prioritize remediation where vulnerable Rust services are externally reachable or business-critical. The available evidence does not support emergency treatment for code execution or known exploitation.
Technical view
HeaderMap::reserve() in the Rust http crate before 0.1.20 has an integer overflow condition. The reported consequence is denial of service, including possible infinite looping. The provided records do not include CVSS, CWE, affected CPEs, or detailed exploit preconditions.
Likely exposure
Exposure is most likely in Rust applications or libraries that depend on http crate versions earlier than 0.1.20, especially where HeaderMap capacity reservation can be reached during request or header processing. The bundle does not identify downstream products or deployment patterns.
Exploitation context
The CVE is not marked as CISA KEV, and the provided sources do not claim active exploitation. A public RustSec advisory and GitHub issue exist, so the weakness is publicly documented. Evidence supports denial of service only.
Researcher notes
The source bundle is sparse: no CVSS, CWE, CPEs, exploit details, or downstream product list are provided. Analysis should stay focused on the http crate before 0.1.20 and the stated HeaderMap::reserve() integer overflow denial-of-service impact.
Mitigation direction
- Upgrade the Rust http crate to version 0.1.20 or later.
- Review vendor and RustSec guidance for any project-specific remediation notes.
- Rebuild and redeploy Rust services after dependency updates.
- Prioritize internet-facing services that parse or process HTTP headers.
Validation and detection
- Review dependency manifests and lockfiles for http crate versions below 0.1.20.
- Check whether vulnerable dependencies are direct or transitive.
- Identify reachable code paths involving HeaderMap::reserve().
- Confirm updated builds no longer include vulnerable http crate versions.
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-2020-25574 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-2019-0033.htmlCVE reference · x_refsource_MISC
- https://github.com/hyperium/http/issues/352CVE 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.