Bug 1949207 (CVE-2021-28878)

Summary:	CVE-2021-28878 rust: memory safety violation in Zip implementation when next_back() and next() are used together
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:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	amulhern, bodavis, igor.raits, jcajka, jistone, jpadman, mnewsome, rust-sig, TicoTimo, tstellar
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	rust 1.52.0	Doc Type:	If docs needed, set a value
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-08-10 13:28:30 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:	1949208, 1949209, 1953007, 1953008, 1959105, 1967940
Bug Blocks:	1949215

Description Guilherme de Almeida Suckevicz 2021-04-13 17:34:44 UTC

In the standard library in Rust before 1.52.0, the Zip implementation calls __iterator_get_unchecked() more than once for the same index (under certain conditions) when next_back() and next() are used together. This bug could lead to a memory safety violation due to an unmet safety requirement for the TrustedRandomAccess trait.

Reference:
https://github.com/rust-lang/rust/issues/82291

Upstream patch:
https://github.com/rust-lang/rust/pull/82292

Comment 1 Guilherme de Almeida Suckevicz 2021-04-13 17:35:06 UTC

Created rust tracking bugs for this issue:

Affects: epel-7 [bug 1949209]
Affects: fedora-all [bug 1949208]

Comment 3 errata-xmlrpc 2021-08-10 07:26:09 UTC

This issue has been addressed in the following products:

  Red Hat Developer Tools

Via RHSA-2021:3042 https://access.redhat.com/errata/RHSA-2021:3042

Comment 4 Product Security DevOps Team 2021-08-10 13:28:30 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-2021-28878

Comment 5 errata-xmlrpc 2021-08-10 13:51:33 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:3063 https://access.redhat.com/errata/RHSA-2021:3063