GHSA-c2hm-mjxv-89r4

Suggest an improvement
Source
https://github.com/advisories/GHSA-c2hm-mjxv-89r4
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2023/09/GHSA-c2hm-mjxv-89r4/GHSA-c2hm-mjxv-89r4.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-c2hm-mjxv-89r4
Aliases
Published
2023-09-04T17:02:00Z
Modified
2024-09-16T16:50:14Z
Summary
Multiple soundness issues in lexical
Details

lexical contains multiple soundness issues:

  1. Bytes::read() allows creating instances of types with invalid bit patterns
  2. BytesIter::read() advances iterators out of bounds
  3. The BytesIter trait has safety invariants but is public and not marked unsafe
  4. write_float() calls MaybeUninit::assume_init() on uninitialized data, which is is not allowed by the Rust abstract machine
    1. radix() calls MaybeUninit::assume_init() on uninitialized data, which is is not allowed by the Rust abstract machine

The crate also has some correctness issues.

Alternatives

For quickly parsing floating-point numbers third-party crates are no longer needed. A fast float parsing algorithm by the author of lexical has been merged into libcore.

For quickly parsing integers, consider atoi and btoi crates (100% safe code). atoi_radix10 provides even faster parsing, but only with -C target-cpu=native, and at the cost of some unsafe.

For formatting integers in a #[no_std] context consider the numtoa crate.

For working with big numbers consider num-bigint and num-traits.

Database specific 
{
    "nvd_published_at": null,
    "cwe_ids": [],
    "severity": "LOW",
    "github_reviewed": true,
    "github_reviewed_at": "2023-09-04T17:02:00Z"
}
References

Affected packages

crates.io / lexical

Package

Name
lexical
View open source insights on deps.dev
Purl
pkg:cargo/lexical

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
7.0.0

Database specific 

{
    "last_known_affected_version_range": "<= 6.1.1"
}