oss-sec mailing list archives
Re: Insecure temp files usage in phusion passenger (other than CVE-2013-2119)
From: Raphael Geissert <geissert () debian org>
Date: Mon, 15 Jul 2013 16:37:29 +0200
Hi again, On 10 June 2013 16:54, Raphael Geissert <geissert () debian org> wrote:
While looking at CVE-2013-2119 I noticed that Phusion Passenger 2.2.11's ext/common/Utils.cpp makeDirTemp() uses mkdir(1) to create directories in /tmp (e.g. /tmp/phusion.$$) for use by the application and web server. A local user could create the directories and have write access to directories, and possibly files used by the application. I haven't confirmed, but I guess this would allow some sort of privilege escalation to the user executing the application or at least access to otherwise restricted data. Additionally, some of the subdirectories might be chown(2)ed to a different user even if the directory already existed (it chowns iff mkdir(1) returns 0). Not sure if it could have an impact, however.
After talking to upstream, the above issue with the temp directory has been fixed in 4.0.6 (release withdrawn and replaced by 4.0.7 due to a regression), and a regression fixed in 4.0.8[2]. The issue was tracked as #910[3]. Could a CVE id be assigned then? It allows a local user to DoS the service or to take over its traffic. [1]http://blog.phusion.nl/2013/07/04/phusion-passenger-4-0-6-released/ Bug fix: https://github.com/phusion/passenger/commit/5483b3292cc2af1c83033eaaadec20dba4dcfd9b [2]http://blog.phusion.nl/2013/07/09/phusion-passenger-4-0-8-released/ Regression fix: https://github.com/phusion/passenger/commit/9dda49f4a3ebe9bafc48da1bd45799f30ce19566 [3]https://code.google.com/p/phusion-passenger/issues/detail?id=910 Cheers, -- Raphael Geissert - Debian Developer www.debian.org - get.debian.net
Current thread:
- Re: Insecure temp files usage in phusion passenger (other than CVE-2013-2119) Raphael Geissert (Jul 15)
- Re: Re: Insecure temp files usage in phusion passenger (other than CVE-2013-2119) Kurt Seifried (Jul 16)