Bug 1245939 (CVE-2015-1331)

Summary:	CVE-2015-1331 lxc: directory traversal flaw
Product:	[Other] Security Response	Reporter:	Martin Prpič <mprpic>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	low	Docs Contact:
Priority:	low
Version:	unspecified	CC:	karlthered, pokorra.mailinglists, sagarun, thomas.moschny
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-08 02:42:50 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:	1245942, 1245943
Bug Blocks:

Description Martin Prpič 2015-07-23 07:49:18 UTC

A directory traversal flaw was found in LXC that allows arbitrary file creation as the root user. A local attacker must set up a symlink at /run/lock/lxc/var/lib/lxc/<CONTAINER>, prior to an admin ever creating an LXC container on the system. If an admin then creates a container with a name matching <CONTAINER>, the symlink will be followed and LXC will create an empty file at the symlink's target as the root user.

This issues is reported to affect versions 1.0.0 and later.

Additional information:

https://launchpad.net/bugs/1470842

Upstream patches:

https://github.com/lxc/lxc/commit/72cf81f6a3404e35028567db2c99a90406e9c6e6 (master)
https://github.com/lxc/lxc/commit/61ecf69d7834921cc078e14d1b36c459ad8f91c7 (stable-1.1)
https://github.com/lxc/lxc/commit/f547349ea7ef3a6eae6965a95cb5986cd921bd99 (stable-1.0)

Comment 1 Martin Prpič 2015-07-23 07:57:32 UTC

Created lxc tracking bugs for this issue:

Affects: fedora-all [bug 1245942]
Affects: epel-all [bug 1245943]

Comment 2 Fedora Update System 2015-08-10 10:05:57 UTC

lxc-1.1.2-2.fc23 has been pushed to the Fedora 23 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 3 Fedora Update System 2015-08-11 02:11:24 UTC

lxc-1.1.2-2.fc22 has been pushed to the Fedora 22 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 4 Fedora Update System 2015-08-11 02:12:58 UTC

lxc-1.0.7-2.fc21 has been pushed to the Fedora 21 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 5 Fedora Update System 2015-08-17 19:06:16 UTC

lxc-1.0.7-2.el7 has been pushed to the Fedora EPEL 7 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 6 Fedora Update System 2015-08-17 19:07:18 UTC

lxc-1.0.7-2.el6 has been pushed to the Fedora EPEL 6 stable repository.  If problems still persist, please make note of it in this bug report.

Comment 7 Product Security DevOps Team 2019-06-08 02:42:50 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.