Bug 1937909 (CVE-2021-27919)

Summary:	CVE-2021-27919 golang: archive/zip: panic when calling Reader.Open
Product:	[Other] Security Response	Reporter:	Guilherme de Almeida Suckevicz <gsuckevi>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	admiller, alegrand, amctagga, amurdaca, anharris, anpicker, aos-bugs, aos-install, asm, bmontgom, bniver, bodavis, deparker, emachado, eparis, erooth, flucifre, fweimer, gmeno, hchiramm, hvyas, jakob, jakub, jburrell, jcajka, jhadvig, jmulligan, jokerman, jpadman, jwendell, jwon, kakkoyun, kconner, krathod, lball, lcosic, lemenkov, madam, maszulik, matzew, mbenjamin, mfojtik, mhackett, mnewsome, mpolacek, mthoemme, nstielau, ohudlick, pkrupa, puebele, rcernich, renich, rhs-bugs, rhuss, rrajasek, rtalur, sipoyare, sostapov, sponnaga, storage-qa-internal, sttts, surbania, tstellar, twalsh, vbatts, vereddy, xxia
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	go 1.16.1	Doc Type:	If docs needed, set a value
Doc Text:	An out of bounds read vulnerability was found in golang. When using the archive/zip standard library (stdlib) and an unexpected file is parsed, it can cause golang to attempt to read outside of a slice (array) causing a panic in the runtime. A potential attacker can use this vulnerability to craft an archive which causes an application using this library to crash resulting in a Denial of Service (DoS).	Story Points:	---
Clone Of:		Environment:
Last Closed:	2021-04-22 10:46:43 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:	1937910, 1937911
Bug Blocks:	1937912

Description Guilherme de Almeida Suckevicz 2021-03-11 17:48:57 UTC

archive/zip in Go 1.16.x before 1.16.1 allows attackers to cause a denial of service (panic) upon attempted use of the Reader.Open API for a ZIP archive in which ../ occurs at the beginning of any filename.

Reference:
https://groups.google.com/g/golang-announce/c/MfiLYjG-RAw

Comment 1 Guilherme de Almeida Suckevicz 2021-03-11 17:49:29 UTC

Created golang tracking bugs for this issue:

Affects: epel-all [bug 1937910]
Affects: fedora-all [bug 1937911]

Comment 2 Mark Cooper 2021-03-15 11:13:32 UTC

The vulnerable function `Reader.Open` was only introduced in Go 1.16 [1] Hence I suspect most RH products wont be affected. 

[1] - https://github.com/golang/go/issues/44916#issue-827996397

Comment 3 Mark Cooper 2021-03-15 11:36:05 UTC

Indeed Reader.go:Open was added here https://github.com/golang/go/commit/1296ee6b4f9058be75c799513ccb488d2f2dd085#diff-0080ec4a6ff2467b5511020b725e4f633f08384e892e18103af78e4fe9912278

So that confirms that the vulnerable functions were only added in go 1.16

Comment 6 Mark Cooper 2021-03-17 00:39:41 UTC

Removed Jaeger from whiteboard as it does not include any references to the archive/zip stdlib.

Comment 7 Mark Cooper 2021-03-18 03:15:54 UTC

External References:

https://groups.google.com/g/golang-announce/c/MfiLYjG-RAw

Comment 8 Mark Cooper 2021-03-18 04:03:34 UTC

Upstream fix: https://github.com/golang/go/commit/634d28d78ccbeb6e86f8bfeba030ea8be518f8fa

Comment 9 Mark Cooper 2021-03-19 04:22:59 UTC

For OpenShift Container Platform (OCP) and OpenShift ServiceMesh (OSSM) the components listed are what depend on the stdlib archive/zip. As they are compiled with an older version of golang (1.15 and earler) they have been marked not affected.

Comment 11 Product Security DevOps Team 2021-04-22 10:46:43 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-2021-27919