CVE-2020-36317

Publication date 11 April 2021

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

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.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
rustc	24.10 oracular	Not in release
	24.04 LTS noble	Not affected
	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.10 kinetic	Ignored end of life, was needs-triage
	22.04 LTS jammy	Not affected
	21.10 impish	Ignored end of life
	21.04 hirsute	Ignored end of life
	20.10 groovy	Ignored end of life
	20.04 LTS focal	Fixed 1.51.0+dfsg1+llvm-1~exp3ubuntu1~20.04.2
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Vulnerable
	14.04 LTS trusty	Ignored end of ESM support, was needed

Notes

litios

on trusty, the vulnerable code is in src/liballoc/string.rs.

Severity score breakdown

Parameter	Value
Base score	7.5 · High
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H