oss-security - Re: CVE-2014-9119: DB Backup plugin for WordPress download.php file Parameter Remote Path Traversal File Access

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Message-ID: <CAHw3cgTm9tUY6khta=2Bw5a8J033E5Kseq38c+nQNuvd9hq+5Q@mail.gmail.com>
Date: Tue, 16 Dec 2014 18:26:42 +0100
From: Ryan Dewhurst <ryandewhurst@...il.com>
To: "Larry W. Cashdollar" <larry0@...com>
Cc: oss-security@...ts.openwall.com, "WordPress.org" <plugins@...dpress.org>, 
	moderators@...db.org, "wpscanteam@...il.com" <wpscanteam@...il.com>
Subject: Re: CVE-2014-9119: DB Backup plugin for WordPress
 download.php file Parameter Remote Path Traversal File Access

I suspect WordPress have removed it from their online database until there
is a patch available. We've seen them do this quite often.

Google has a cache of the page from yesterday: 15 Dec 2014 05:11:28 GMT.

On Tue, Dec 16, 2014 at 6:20 PM, Larry W. Cashdollar <larry0@...com> wrote:

> When going to this plugin page (https://wordpress.org/plugins/db-backup/)
> I get :
>
> Whoops!
>
> We couldn't find that plugin. Maybe you were looking for one of these?
>
>
>
> > On Dec 16, 2014, at 11:51 AM, Henri Salo <henri@...v.fi> wrote:
> >
> > -----BEGIN PGP SIGNED MESSAGE-----
> > Hash: SHA1
> >
> > Product: WordPress plugin db-backup
> > Plugin page: https://wordpress.org/plugins/db-backup/
> > Developer: Syed Amir Hussain "syedamirhussain91"
> > Vulnerability Type: Remote Path Traversal File Access
> > CWE-23: Relative Path Traversal
> > Vulnerable Versions: 4.5 and earlier
> > Fixed Version: N/A
> > Vendor Notification: 2014-11-27
> > Public Disclosure: 2014-12-16
> > CVE Reference: CVE-2014-9119
> > Criticality: High
> >
> > Vulnerability details:
> >
> > DB Backup plugin for WordPress contains a flaw that allows traversing
> outside of
> > a restricted path. The issue is due to the download.php script not
> properly
> > sanitizing user input, specifically path traversal style attacks (e.g.
> '../').
> > With a specially crafted request, a remote attacker can gain read access
> to
> > arbitrary files, limited by system operational access control. This
> > vulnerability can be used to get WordPress authentication keys and salts,
> > database address and credentials, which can be used in certain
> environments to
> > elevate privileges and execute malicious PHP code.
> >
> > Root cause:
> >
> > Unsanitized user input to readfile() function.
> >
> > Proof-of-concept:
> >
> > /wp-content/plugins/db-backup/download.php?file=../../../wp-config.php
> >
> > Timeline:
> >
> > 2014-11-27: Reported to developer and WordPress plugins team.
> > 2014-11-27: CVE assigned and reported to developer.
> > 2014-11-28: Communication with developer and he said this will be fixed.
> > 2014-12-02: Asked status from developer.
> > 2014-12-03: Developer says this will be fixed by 7th.
> > 2014-12-07: Asked status from developer.
> > 2014-12-08: Developer responds.
> > 2014-12-09: Asked more details from developer.
> > 2014-12-10: More discussion about the solution and new disclosure date
> set.
> > 2014-12-16: Agreed disclosure date was 15th, I don't understand issue
> with
> > patching so public disclosure. Please note that there are hundreds of
> backup
> > plugins in WordPress Plugin Directory.
> >
> > Notes:
> >
> > - - Remove plugin "db-backup" as deactivation does not fix the issue.
> > - - Use another plugin until patch is available and new version is
> published.
> > - - Sites I know using this plugin will be notified via abuse emails
> today.
> >
> > References:
> > http://cwe.mitre.org/data/definitions/23.html
> > https://scapsync.com/cwe/CWE-23
> > https://www.owasp.org/index.php/Path_Traversal
> >
> https://www.owasp.org/index.php/Testing_for_Path_Traversal_%28OTG-AUTHZ-001%29
> >
> > - --
> > Henri Salo
> > -----BEGIN PGP SIGNATURE-----
> > Version: GnuPG v1.4.12 (GNU/Linux)
> >
> > iEYEARECAAYFAlSQYwcACgkQXf6hBi6kbk8uHwCeJfQd1Vjc2Rr6kzyFxF8rC4NW
> > zbMAoKG4tidQkLM5qrnyIfHTVZPXbOdk
> > =5Nmf
> > -----END PGP SIGNATURE-----
>
>

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