CVE-2020-36317

rust: memory safety violation in String::retain()

Severity Score

7.5

*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, String::retain() function has a panic safety problem. It allows creation of a non-UTF-8 Rust string when the provided closure panics. This bug could result in a memory safety violation when other string APIs assume that UTF-8 encoding is used on the same string.

En la biblioteca estándar en Rust versiones anteriores a 1.49.0, la función String::retener() presenta un problema de seguridad de pánico. Permite una creación de una cadena Rust que no sea UTF-8 cuando el cierre provisto entra en pánico. Este bug podría resultar en una violación de seguridad de la memoria cuando otras API de cadena asumen que es usada una codificación UTF-8 en la misma cadena

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

None

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
2023-12-26 EPSS Updated
2024-08-04 CVE Updated
2024-08-04 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer
CWE-787: Out-of-bounds Write

CAPEC

References (4)

URL	Tag	Source

URL	Date	SRC
https://github.com/rust-lang/rust/issues/78498	2024-08-04

URL	Date	SRC
https://github.com/rust-lang/rust/pull/78499	2022-06-28

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2020-36317	2021-06-03
https://bugzilla.redhat.com/show_bug.cgi?id=1949189	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"				< 1.49.0 Search vendor "Rust-lang" for product "Rust" and version " < 1.49.0"		-		Affected