PT-2020-17497 · Rust · Os Str Bytes

Published 2020-04-24 · Updated 2021-08-25 · CVE-2020-35865

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions os str bytes crate versions prior to 2.0.0

Description The issue arises from false expectations about the behavior of char::from u32 unchecked. Specifically, the Windows implementation of the os str bytes crate relied on the behavior of std::char::from u32 unchecked when its safety clause is violated. Although this behavior worked with Rust versions up to 1.42, it could change with any new Rust version, potentially leading to a security issue.

Recommendations For os str bytes crate versions prior to 2.0.0, update to version 2.0.0 to resolve the issue.

Fix

Incorrect Type Conversion or Cast

Weakness Enumeration

CWE-704

Related Identifiers

CVE-2020-35865

GHSA-Q948-X8RF-888M

RUSTSEC-2020-0012

Affected Products

Os Str Bytes

References · 8

• https://nvd.nist.gov/vuln/detail/CVE-2020-35865 · Security Note
• https://osv.dev/vulnerability/GHSA-q948-x8rf-888m · Vendor Advisory
• https://rustsec.org/advisories/RUSTSEC-2020-0012.html · Patch
• https://osv.dev/vulnerability/CVE-2020-35865 · Vendor Advisory
• https://osv.dev/vulnerability/RUSTSEC-2020-0012 · Vendor Advisory
• https://github.com/dylni/os_str_bytes · Note
• https://github.com/dylni/os_str_bytes/pull/1 · Note
• https://crates.io/crates/os_str_bytes · Note