PT-2021-18553 · Through · Through

Published 2021-02-18 · Updated 2021-08-25 · CVE-2021-29940

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 through crate versions prior to 2021-02-18

Description The issue arises from the through and through and functions, which take a mutable reference and a mapping function. These functions duplicate ownership by calling ptr::read on the reference, and then call the mapping function. If the mapping function panics, both the original object and the duplicated object are dropped, resulting in a double free.

Recommendations For versions prior to 2021-02-18, consider restricting the use of the through and through and functions until a patch is available. As a temporary workaround, avoid using these functions with mapping functions that may panic. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Double Free

Weakness Enumeration

CWE-415

Related Identifiers

CVE-2021-29940

GHSA-5HPJ-M323-CPHM

RUSTSEC-2021-0049

Affected Products

Through

References · 10

• 🔥 https://rustsec.org/advisories/RUSTSEC-2021-0049.html · Exploit
• https://osv.dev/vulnerability/CVE-2021-29940 · Vendor Advisory
• https://osv.dev/vulnerability/RUSTSEC-2021-0049 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-29940 · Security Note
• https://osv.dev/vulnerability/GHSA-5hpj-m323-cphm · Vendor Advisory
• https://github.com/gretchenfrage/through/issues/1 · Note
• https://github.com/gretchenfrage/through · Note
• https://t.me/cvenotify/12462 · Telegram Post
• https://crates.io/crates/through · Note
• https://t.me/cvenotify/12733 · Telegram Post