Security readout for executives and security teams
Plain-English summary
A flaw in Rust's standard library could expose pieces of uninitialized memory if an application debug-prints an iterator over an empty VecDeque. The practical risk is accidental leakage into strings or logs, not a general remote takeover. The issue is fixed in Rust 1.30.0 and specified later nightly builds.
Executive priority
Treat this as a targeted hygiene item unless legacy Rust builds remain in production. Prioritize teams maintaining old Rust services, security-sensitive logging, or regulated data environments. No source in the bundle supports emergency response or active exploitation.
Technical view
CVE-2019-1010299 affects Rust standard library 1.18.0 and later before 1.30.0. The vulnerable component is the Debug trait implementation for std::collections::vec_deque::Iter. When debug formatting is invoked for an iterator over an empty VecDeque, uninitialized memory contents may be printed, causing CWE-200 information exposure.
Likely exposure
Exposure is most likely in Rust applications built with affected toolchains that log or format Debug output from VecDeque iterators. Systems using Rust 1.30.0 or later are expected to be fixed. The bundle provides no CPEs, CVSS score, or downstream product list.
Exploitation context
The source bundle does not show active exploitation, and KEV is false. The attack vector is narrow: the program must invoke debug printing for an iterator over an empty VecDeque. Impact depends on whether exposed memory reaches logs, strings, telemetry, or user-visible output.
Researcher notes
The key condition is Debug formatting of std::collections::vec_deque::Iter over an empty VecDeque. The public record names the fixed version and commit, but does not provide CVSS, exploit evidence, affected downstream products, or detailed detection artifacts.
Mitigation direction
- Upgrade Rust toolchains to 1.30.0 or later.
- For nightly Rust, use builds after commit b85e4cc8fadaabd41da5b9645c08c68b8f89908d.
- Rebuild and redeploy applications compiled with affected Rust standard libraries.
- Review logging paths that format VecDeque iterators with Debug output.
Validation and detection
- Inventory Rust toolchain versions used for production builds.
- Confirm no production build uses Rust 1.18.0 through pre-1.30.0 stdlib.
- Review code and logs for Debug formatting of VecDeque iterators.
- Check whether sensitive logs captured unexpected memory-like output.
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.
CWE-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2019-1010299 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://github.com/rust-lang/rust/issues/53566CVE reference · x_refsource_MISC
- https://github.com/rust-lang/rust/pull/53571/commits/b85e4cc8fadaabd41da5b9645c08c68b8f89908dCVE 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.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.