GHSA-wp34-mqw5-jj85

Source

https://github.com/advisories/GHSA-wp34-mqw5-jj85

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/08/GHSA-wp34-mqw5-jj85/GHSA-wp34-mqw5-jj85.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-wp34-mqw5-jj85

Aliases

CVE-2021-28032
RUSTSEC-2021-0031

Published

2021-08-25T20:52:00Z

Modified

2023-11-08T04:05:27.788398Z

Severity

9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

Use after free in nano_arena

Details

Affected versions of this crate assumed that Borrow<Idx> was guaranteed to return the same value on .borrow(). The borrowed index value was used to retrieve a mutable reference to a value.

If the Borrow<Idx> implementation returned a different index, the split arena would allow retrieving the index as a mutable reference creating two mutable references to the same element. This violates Rust's aliasing rules and allows for memory safety issues such as writing out of bounds and use-after-frees.

The flaw was corrected in commit 6b83f9d by storing the .borrow() value in a temporary variable.

Database specific

{
    "nvd_published_at": null,
    "cwe_ids": [
        "CWE-416"
    ],
    "severity": "CRITICAL",
    "github_reviewed": true,
    "github_reviewed_at": "2021-08-19T17:23:52Z"
}

References

Affected packages

crates.io / nano_arena

Package

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

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

0.5.2

Ecosystem specific

{
    "affected_functions": [
        "nano_arena::Arena::split_at",
        "nano_arena::ArenaSplit::split_at"
    ]
}