PT-2020-17530 · Actix · Actix-Utils

Published 2020-01-08 · Updated 2021-08-25 · CVE-2020-35898

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions actix-utils crate versions prior to 2.0.0

Description The issue arises from the custom implementation of a Cell primitive in the affected versions of the actix-utils crate, which fails to track mutable references to the underlying data. This allows obtaining multiple mutable references to the same object, potentially resulting in arbitrary memory corruption, most likely use-after-free.

Recommendations For versions prior to 2.0.0, update to version 2.0.0 or later, which corrects the flaw by switching from a bespoke Cell implementation to Rc<RefCell>.

Exploit

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2020-35898

GHSA-HHW2-PQHF-VMX2

RUSTSEC-2020-0045

Affected Products

Actix-Utils

References · 10

• 🔥 https://rustsec.org/advisories/RUSTSEC-2020-0045.html · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2020-35898 · Security Note
• https://osv.dev/vulnerability/RUSTSEC-2020-0045 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-hhw2-pqhf-vmx2 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-35898 · Vendor Advisory
• https://github.com/actix/actix-net/commit/0dca1a705ad1ff4885b3491ecb809a808e1de66c · Note
• https://github.com/actix/actix-net/issues/160 · Note
• https://github.com/actix/actix-net · Note
• https://t.me/cvenotify/8278 · Telegram Post
• https://crates.io/crates/actix-utils · Note