Bug 1418771 (CVE-2017-5630) - CVE-2017-5630 php-pear: File overwrite by malicious server
Summary: CVE-2017-5630 php-pear: File overwrite by malicious server
Keywords:
Status: CLOSED WONTFIX
Alias: CVE-2017-5630
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1418773
Blocks: 1418772
TreeView+ depends on / blocked
 
Reported: 2017-02-02 16:54 UTC by Andrej Nemec
Modified: 2021-02-17 02:39 UTC (History)
6 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2017-04-06 07:08:47 UTC
Embargoed:

Attachments (Terms of Use)

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.
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