Detections
Analytics

CVE-2020-36323

high

Description

In the standard library in Rust before 1.52.0, there is an optimization for joining strings that can cause uninitialized bytes to be exposed (or the program to crash) if the borrowed string changes after its length is checked.

References

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/VZG65GUW6Z2CYOQHF7T3TB5CZKIX6ZJE/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TFUO3URYCO73D2Q4WYJBWAMJWGGVXQO4/

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CZ337CM4GFJLRDFVQCGC7J25V65JXOG5/

https://github.com/rust-lang/rust/pull/81728#issuecomment-824904190

https://github.com/rust-lang/rust/pull/81728#issuecomment-821549174

https://github.com/rust-lang/rust/pull/81728

https://github.com/rust-lang/rust/issues/80335

https://euvd.enisa.europa.eu/vulnerability/EUVD-2020-23862

Details

Source: Mitre, NVD

Published: 2021-04-14

Updated: 2026-06-17

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 8.2

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H

Severity: High

EPSS

EPSS: 0.00105