Bug 1319768 (CVE-2016-3068)

Summary:	CVE-2016-3068 mercurial: command injection via git subrepository urls
Product:	[Other] Security Response	Reporter:	Adam Mariš <amaris>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	anemec, pstodulk, security-response-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	mercurial 3.7.3	Doc Type:	Bug Fix
Doc Text:	It was discovered that Mercurial failed to properly check Git sub-repository URLs. A Mercurial repository that includes a Git sub-repository with a specially crafted URL could cause Mercurial to execute arbitrary code.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-05-02 13:02:14 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Bug Depends On:	1322268, 1323599, 1327167, 1327168
Bug Blocks:	1319772, 1322269

Description Adam Mariš 2016-03-21 13:27:43 UTC

It was reported that in mercurial, there is similar vulnerability as CVE-2015-7545 in git. Git's git-remote-ext remote helper provides an ext:: URL scheme that allows running arbitrary shell commands. Mercurial allows specifying git repositories as subrepositories. Git ext:: URLs can be specified as Mercurial subrepositories allowing arbitrary shell commands to be run on `hg clone ...`.

Comment 1 Adam Mariš 2016-03-21 13:27:47 UTC

Acknowledgments:

Name: Blake Burkhart

Comment 3 Adam Mariš 2016-04-04 08:08:02 UTC

*** Bug 1322266 has been marked as a duplicate of this bug. ***

Comment 4 Adam Mariš 2016-04-04 08:10:38 UTC

External references:

https://www.mercurial-scm.org/wiki/WhatsNew#Mercurial_3.7.3_.282016-3-29.29

Upstream fix:

https://selenic.com/repo/hg-stable/rev/34d43cb85de8

Comment 5 Adam Mariš 2016-04-04 08:13:12 UTC

Created mercurial tracking bugs for this issue:

Affects: fedora-all [bug 1323599]

Comment 6 Tomas Hoger 2016-04-14 11:27:31 UTC

Support for git subrepos was introduced upstream in mercurial version 1.8:

https://www.mercurial-scm.org/wiki/WhatsNew/Archive#Mercurial_1.8_.282011-03-01.29

Therefore, mercurial packages in Red Hat Enterprise Linux 6 based on upstream version 1.4 were not affected by this issue.

Comment 13 errata-xmlrpc 2016-05-02 12:58:09 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:0706 https://rhn.redhat.com/errata/RHSA-2016-0706.html