PT-2020-17517 · Rust · Alpm-Rs

Published 2020-08-20 · Updated 2021-09-13 · CVE-2020-35885

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions alpm-rs crate through 2020-08-20

Description An issue was discovered in the alpm-rs crate where StrcCtx performs improper memory deallocation. This can introduce memory safety issues such as double-free and use-after-free to client programs. Specifically, StrcCtx deallocate a memory region that it doesn't own when StrcCtx is created without using StrcCtx::new.

Recommendations For alpm-rs crate through 2020-08-20, ensure that StrcCtx is created using StrcCtx::new to avoid improper memory deallocation. As a temporary workaround, consider restricting the use of StrcCtx until a patch is available.

Fix

Double Free

Weakness Enumeration

CWE-415

Related Identifiers

CVE-2020-35885

GHSA-QC4M-GC8R-MG8M

RUSTSEC-2020-0032

Affected Products

Alpm-Rs

References · 9

• https://nvd.nist.gov/vuln/detail/CVE-2020-35885 · Security Note
• https://osv.dev/vulnerability/CVE-2020-35885 · Vendor Advisory
• https://osv.dev/vulnerability/RUSTSEC-2020-0032 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-qc4m-gc8r-mg8m · Vendor Advisory
• https://github.com/pigeonhands/rust-arch/issues/2 · Note
• https://github.com/BahNahNah/rust-arch/tree/master/alpm-rs · Note
• https://t.me/cibsecurity/21460 · Telegram Post
• https://rustsec.org/advisories/RUSTSEC-2020-0032.html · Note
• https://crates.io/crates/alpm-rs · Note