Security readout for executives and security teams
Plain-English summary
CVE-2020-36434 affects the Rust sys-info crate before 0.8.0. Calling disk_info can trigger a double free, a memory-management fault that may crash software or corrupt memory. The public sources do not provide CVSS, affected application contexts, or confirmed exploitation evidence.
Executive priority
Treat this as a dependency hygiene issue with uncertain severity. Upgrade affected software, especially where disk_info is reachable in production services. Escalate priority if internal review finds user-triggered execution or critical service availability impact.
Technical view
The issue is in sys_info::disk_info in sys-info versions before 0.8.0. The documented failure mode is double free. Exposure depends on whether an application depends on sys-info and reaches disk_info during normal or user-influenced execution. No CWE, CVSS vector, exploit details, or exploit-in-the-wild claim is provided.
Likely exposure
Likely exposure is Rust applications or services that include sys-info before 0.8.0 and call sys_info::disk_info. The provided CVE affected-product metadata is not specific, so dependency inventory is required to determine real exposure.
Exploitation context
The source bundle says disk_info calls can trigger the issue. It does not say whether the bug is remotely reachable, reliably exploitable, or only a denial-of-service risk. CISA KEV status is false in the provided bundle.
Researcher notes
Evidence is limited to RustSec and CVE metadata. The key validation question is reachability of sys_info::disk_info. Avoid assuming remote code execution or active exploitation from the available sources.
Mitigation direction
- Upgrade sys-info to version 0.8.0 or later.
- Review vendor and RustSec guidance before deployment.
- Prioritize services where disk_info runs on request paths.
- Rebuild and redeploy affected Rust applications after dependency updates.
Validation and detection
- Check Cargo.lock for sys-info versions below 0.8.0.
- Identify code paths that call sys_info::disk_info.
- Confirm rebuilt artifacts include sys-info 0.8.0 or later.
- Run regression tests covering disk information functionality.
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-2020-36434 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-2020-0100.htmlCVE reference · x_refsource_MISC
- https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/sys-info/RUSTSEC-2020-0100.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.