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CVE-2020-36317

Published: 11 April 2021

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.

Notes

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

Priority

Medium

Cvss 3 Severity Score

7.5

Score breakdown

Status

Package Release Status
rustc
Launchpad, Ubuntu, Debian
bionic Not vulnerable
(1.51.0+dfsg1+llvm-1~exp3ubuntu1~18.04.1)
focal
Released (1.51.0+dfsg1+llvm-1~exp3ubuntu1~20.04.2)
groovy Ignored
(end of life)
hirsute Ignored
(end of life)
impish Ignored
(end of life)
jammy Not vulnerable
(1.51.0+dfsg1+llvm-1~exp3ubuntu1)
kinetic Ignored
(end of life, was needs-triage)
lunar Not vulnerable
(1.61.0+dfsg1-1~exp1ubuntu1)
mantic Not vulnerable
(1.67.1+dfsg0ubuntu1-0ubuntu2)
noble Not vulnerable
(1.67.1+dfsg0ubuntu1-0ubuntu2)
trusty Needed

upstream
Released (1.49.0)
xenial Needed

Severity score breakdown

Parameter Value
Base score 7.5
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