PT-2020-17639 · Rust · Lexer Crate

Published 2020-11-10 · Updated 2022-05-03 · CVE-2020-36458

Positive Technologies (AI Summary)

CVSS v3.1

8.1

High

Base vector

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

Name of the Vulnerable Software and Affected Versions lexer crate through 2020-11-10

Description The issue is related to the implementation of Sync for ReaderResult<T, E> with a trait bound of T: Send, E: Send, which can lead to data races and memory corruption when multiple threads access &T or &E concurrently. This is because matching on the public enum ReaderResult<T, E> provides access to &T and &E, allowing access to non-Sync types T or E.

Recommendations For lexer crate through 2020-11-10, consider changing the trait bounds imposed on T and E to be T: Sync, E: Sync to resolve the issue. As a temporary workaround, consider restricting concurrent access to ReaderResult<T, E> instances to minimize the risk of memory corruption.

Exploit

Fix

Command Injection

Race Condition

Weakness Enumeration

CWE-77

CWE-362

Related Identifiers

CVE-2020-36458

GHSA-F997-8GXG-R354

RUSTSEC-2020-0138

Affected Products

Lexer Crate

References · 9

• 🔥 https://rustsec.org/advisories/RUSTSEC-2020-0138.html · Exploit
• https://osv.dev/vulnerability/GHSA-f997-8gxg-r354 · Vendor Advisory
• https://osv.dev/vulnerability/RUSTSEC-2020-0138 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-36458 · Security Note
• https://osv.dev/vulnerability/CVE-2020-36458 · Vendor Advisory
• https://gitlab.com/nathanfaucett/rs-lexer · Note
• https://gitlab.com/nathanfaucett/rs-lexer/-/issues/2 · Note
• https://raw.githubusercontent.com/rustsec/advisory-db/main/crates/lexer/RUSTSEC-2020-0138.md · Note
• https://crates.io/crates/lexer · Note