CVE-2020-36318

rust: use-after-free or double free in VecDeque::make_contiguous

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

In the standard library in Rust before 1.49.0, VecDeque::make_contiguous has a bug that pops the same element more than once under certain condition. This bug could result in a use-after-free or double free.

En la biblioteca estándar de Rust versiones anteriores a 1.49.0, la función VecDeque::make_contiguous presenta un bug que muestra el mismo elemento más de una vez bajo determinadas condiciones. Este bug podría resultar en un uso de la memoria previamente liberada o una doble liberación

Rust Toolset provides the Rust programming language compiler rustc, the cargo build tool and dependency manager, the cargo-vendor plugin, and required libraries. This enhancement update adds the rust-toolset-1.49 packages to Red Hat Developer Tools. Issues addressed include double free and use-after-free vulnerabilities.

*Credits: N/A

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-04-11 CVE Reserved
2021-04-11 CVE Published
2024-08-04 CVE Updated
2024-08-04 First Exploit
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-415: Double Free
CWE-416: Use After Free

CAPEC

References (4)

URL	Tag	Source

URL	Date	SRC
https://github.com/rust-lang/rust/issues/79808	2024-08-04

URL	Date	SRC
https://github.com/rust-lang/rust/pull/79814	2021-04-26

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2020-36318	2021-06-03
https://bugzilla.redhat.com/show_bug.cgi?id=1949192	2021-06-03

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Rust-lang Search vendor "Rust-lang"		Rust Search vendor "Rust-lang" for product "Rust"				>= 1.48.0 < 1.49.0 Search vendor "Rust-lang" for product "Rust" and version " >= 1.48.0 < 1.49.0"		-		Affected