bugtraq - cPanel hardlink chown issue

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <41739206.7080206@drumnbass.art.pl>
Date: Mon, 18 Oct 2004 11:51:02 +0200
From: Karol Więsek <appelast@...mnbass.art.pl>
To: full-disclosure@...ts.netsys.com, bugtraq@...urityfocus.com
Subject: cPanel hardlink chown issue

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Name:			cPanel
Vendor URL:		http://www.cpanel.net
Author: 		Karol Więsek <appelast@...mnbass.art.pl>
Date: 			July 31, 2004

Issue:
cPanel allows logged in users to change ownership of any file to their
uid:gid.

Description:
cPanel is a next generation web hosting control panel system. cPanel is
extremely feature rich as well as include an easy to use web based
interface (GUI). cPanel is designed for the end users of your system and
allows them to control everything from adding / removing email accounts
to administering MySQL databases.

Details:
cPanel allows users to turn on/off front fage extensions. It is done
with effective uid of system administrator ( root ). During this process
is created special .htaccess file, and then it is chown() to target
user. Attacker could link .htaccess to any file in the same partition,
thus it will be chown()ed.

Exploit:
To exploit this vulnerability just link file you want to grab to
.htaccess in users public_html, and execute installation of frontpage
extensions.

Tested on cPanel 9.4.1-RELEASE-64, and confirmed vulnerable.

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFBc5IGFTSet8AbQUQRAnZFAJsHuMk3cizlBSURzg0kJsKY2lhKkwCfXkfx
E6JxPLbrhmGt1DH9FqtS+0U=
=EbBw
-----END PGP SIGNATURE-----

_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html