Bug 2008592 (CVE-2021-41089)

Summary:	CVE-2021-41089 moby: `docker cp` allows unexpected chmod of host file
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	alazar, amurdaca, aos-bugs, bdettelb, bmontgom, dwalsh, eparis, gghezzo, gparvin, jburrell, jhrozek, jokerman, josorior, jramanat, kaycoth, lgamliel, lnacshon, lsm5, mfilanov, mrogers, nalin, nstielau, pahickey, pdhamdhe, rfreiman, security-response-team, sponnaga, stcannon, tsweeney, vkumar, vrothber, xiyuan
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	moby 20.10.9	Doc Type:	If docs needed, set a value
Doc Text:	A file permissions vulnerability was found in Moby (Docker Engine). Copying files by using `docker cp` into a specially-crafted container can result in Unix file permission changes for existing files in the host's filesystem, which might lead to permissions escalation and allow an attacker access to restricted data.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-10-28 09:07:19 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:	2009329, 2009330, 2010238, 2010239, 2010240, 2010241, 2012387, 2012388, 2012389, 2012390, 2012391, 2012392, 2012393, 2012394, 2023965, 2023966
Bug Blocks:	2008593

Description Pedro Sampaio 2021-09-28 15:48:58 UTC

A bug was found in Moby (Docker Engine) where attempting to copy files using `docker cp` into a specially-crafted container can result in Unix file permission changes for existing files in the host's filesystem, widening access to others.

References:

https://github.com/moby/moby/security/advisories/GHSA-v994-f8vw-g7j4

Comment 9 errata-xmlrpc 2022-03-03 06:57:49 UTC

This issue has been addressed in the following products:

  Red Hat Advanced Cluster Management for Kubernetes 2.4 for RHEL 8

Via RHSA-2022:0735 https://access.redhat.com/errata/RHSA-2022:0735