Ecosyste.ms: Advisories

Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLXdwMzQtbXF3NS1qajg1

Use after free in nano_arena

Affected versions of this crate assumed that Borrow 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 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.

Permalink: https://github.com/advisories/GHSA-wp34-mqw5-jj85
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLXdwMzQtbXF3NS1qajg1
Source: GitHub Advisory Database
Origin: Unspecified
Severity: Critical
Classification: General
Published: over 2 years ago
Updated: 11 months ago

CVSS Score: 9.8
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Identifiers: GHSA-wp34-mqw5-jj85, CVE-2021-28032
References:

• https://nvd.nist.gov/vuln/detail/CVE-2021-28032
• https://github.com/bennetthardwick/nano-arena/issues/1
• https://rustsec.org/advisories/RUSTSEC-2021-0031.html
• https://github.com/bennetthardwick/nano-arena/commit/6b83f9d0708337a9f8b709c1624a8587021ceba2
• https://github.com/advisories/GHSA-wp34-mqw5-jj85

Repository: https://github.com/bennetthardwick/nano-arena
Blast Radius: 1.0

Affected Packages