Bug 1921286 (CVE-2021-21272)

Summary:	CVE-2021-21272 oras: zip-slip vulnerability via oras-pull
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, alitke, aos-bugs, bbennett, beth.white, bmontgom, bthurber, cnv-qe-bugs, dramseur, ecordell, eparis, fdeutsch, gghezzo, gparvin, hvyas, jburrell, jhadvig, jhrozek, jhunter, jlanford, jokerman, josorior, jramanat, jweiser, kmitts, lgamliel, mfilanov, mgala, mjudeiki, mrogers, nstielau, oyahud, pdhamdhe, phoracek, rfreiman, sponnaga, stcannon, stirabos, team-winc, thee, xiyuan
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	github.com/deislabs/oras 0.9.0	Doc Type:	If docs needed, set a value
Doc Text:	A flaw was found in oras. The directory support feature allows the downloaded gzipped tarballs to be automatically extracted to the user-specified directory where the tarball can have symbolic links and hard links. A well-crafted tarball or tarballs allow malicious artifact providers linking, writing, or overwriting specific files on the host filesystem outside of the user-specified directory unexpectedly with the same permissions as the user who runs `oras pull`.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-08-06 01:06:57 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:	1927753, 1927754, 1927755, 1927756, 1927757, 1927758, 1927759, 1927760, 1927761, 1927762, 1927764, 1927765, 1927766, 1927767, 1927768, 1927769, 1930206, 1930207, 1930208, 1930209, 1930210, 1930235, 1930237, 1930771, 1930772, 1930774, 1983981
Bug Blocks:	1921287

Description Pedro Sampaio 2021-01-27 20:47:42 UTC

ORAS is open source software which enables a way to push OCI Artifacts to OCI Conformant registries. ORAS is both a CLI for initial testing and a Go Module. In ORAS from version 0.4.0 and before version 0.9.0, there is a "zip-slip" vulnerability. The directory support feature allows the downloaded gzipped tarballs to be automatically extracted to the user-specified directory where the tarball can have symbolic links and hard links. A well-crafted tarball or tarballs allow malicious artifact providers linking, writing, or overwriting specific files on the host filesystem outside of the user-specified directory unexpectedly with the same permissions as the user who runs `oras pull`. Users of the affected versions are impacted if they are `oras` CLI users who runs `oras pull`, or if they are Go programs, which invoke `github.com/deislabs/oras/pkg/content.FileStore`. The problem has been fixed in version 0.9.0. For `oras` CLI users, there is no workarounds other than pulling from a trusted artifact provider. For `oras` package users, the workaround is to not use `github.com/deislabs/oras/pkg/content.FileStore`, and use other content stores instead, or pull from a trusted artifact provider.

References:

https://github.com/deislabs/oras/commit/96cd90423303f1bb42bd043cb4c36085e6e91e8e
https://github.com/deislabs/oras/releases/tag/v0.9.0
https://github.com/deislabs/oras/security/advisories/GHSA-g5v4-5x39-vwhx
https://pkg.go.dev/github.com/deislabs/oras/pkg/oras

Comment 14 Stoyan Nikolov 2021-02-23 11:34:33 UTC

Statement:

A vulnerable version of github.com/deislabs/oras package is delivered in listed OpenShift Container Platform (OCP) and OpenShift Container Storage components, but the vulnerable code is not invoked, therefore these components are affected but with impact Low.

Comment 15 Sam Fowler 2021-04-29 05:38:51 UTC

External References:

https://github.com/deislabs/oras/security/advisories/GHSA-g5v4-5x39-vwhx

Comment 19 errata-xmlrpc 2021-08-06 00:49:59 UTC

This issue has been addressed in the following products:

  Red Hat Advanced Cluster Management for Kubernetes 2.3 for RHEL 7
  Red Hat Advanced Cluster Management for Kubernetes 2.3 for RHEL 8

Via RHSA-2021:3016 https://access.redhat.com/errata/RHSA-2021:3016

Comment 20 Product Security DevOps Team 2021-08-06 01:06:57 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-2021-21272