Bug 1418771 (CVE-2017-5630)

Summary:	CVE-2017-5630 php-pear: File overwrite by malicious server
Product:	[Other] Security Response	Reporter:	Andrej Nemec <anemec>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED WONTFIX	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	fedora, hhorak, jorton, rcollet, rpm, webstack-team
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in php-pear where if a malicious server responded to a pear	Story Points:	---
Clone Of:		Environment:
Last Closed:	2017-04-06 07:08:47 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:	1418773
Bug Blocks:	1418772

Description Andrej Nemec 2017-02-02 16:54:02 UTC

PECL in the download utility class in the Installer in PEAR Base System
v1.10.1 does not validate file types and filenames after a redirect,
which allows remote HTTP servers to overwrite files via crafted
responses, as demonstrated by a .htaccess overwrite.

Upstream bug:

http://pear.php.net/bugs/bug.php?id=21171

Comment 1 Andrej Nemec 2017-02-02 16:56:06 UTC

Created php-pear tracking bugs for this issue:

Affects: fedora-all [bug 1418773]

Comment 3 Doran Moppert 2017-04-06 07:07:07 UTC

Mitigation:

This vulnerability only allows files in the current directory to be overwritten, so using `pear download` in a temporary directory effectively mitigates the risk of a dangerous file overwrite occurring.

Comment 4 Doran Moppert 2017-04-06 07:07:16 UTC

Statement:

Since pear's purpose is to download libraries for inclusion in an application, any use of `pear install` or `pear download` implicitly trusts the server. This vulnerability does not significantly extend the trust already given to pear and to servers used with it.