Bug 1949189 (CVE-2020-36317)

Summary:	CVE-2020-36317 rust: memory safety violation in String::retain()
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	amulhern, bodavis, igor.raits, jcajka, jistone, jpadman, mcermak, mnewsome, rust-sig, TicoTimo, tstellar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	rust 1.49.0	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-05-18 20:38:43 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1896712, 1951680, 1951701, 1951702
Bug Blocks:	1949215

Description Guilherme de Almeida Suckevicz 2021-04-13 17:03:35 UTC

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.

Reference:
https://github.com/rust-lang/rust/issues/78498

Upstream patch:
https://github.com/rust-lang/rust/pull/78499

Comment 6 errata-xmlrpc 2021-05-18 16:14:29 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:1935 https://access.redhat.com/errata/RHSA-2021:1935

Comment 7 Product Security DevOps Team 2021-05-18 20:38:43 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-36317

Comment 8 errata-xmlrpc 2021-06-03 10:55:47 UTC

This issue has been addressed in the following products:

  Red Hat Developer Tools

Via RHSA-2021:2243 https://access.redhat.com/errata/RHSA-2021:2243