Home page logo
/

oss-sec logo oss-sec mailing list archives

Re: CVE-2012-2248: isc-dhcp, Debian-specific: build path included in PATH
From: Kurt Seifried <kseifried () redhat com>
Date: Wed, 17 Oct 2012 18:41:12 -0600

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

On 10/17/2012 01:46 PM, Michael Gilbert wrote:
On Wed, Oct 17, 2012 at 3:42 PM, Kurt Seifried wrote:
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1

On 10/15/2012 02:50 PM, Raphael Geissert wrote:
Hi,

Michael Stapelberg, Tollef Fog Heen, and Michael Biebl
discovered that dhclient was setting dhclient-script's PATH to
one that included a subdirectory of the build directory[1].
This issue is caused by the way isc-dhcp is packaged in
Debian.

At least two versions of isc-dhcp for the amd64 (x86_64) 
architecture in Debian were found two be setting PATH to a 
subdirectory of /home/zero79/, which would allow a user with
such HOME directory to be able to execute code as root.

To clarify the bug report: it is not specific to samba or hooks
in general, PATH is injected in the environment passed to the
execve() call that executes dhclient-script.

Since this issue doesn't affect the stable release, there won't
be a DSA. This email is just a heads up.

[1]http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=690532

Cheers,


Was this software released however?

It was uploaded to and affected Debian testing and unstable.
Testing has not yet been officially "released", but some people use
testing as if it were an official release.  Unstable never gets
released.

When I say released I meant in the sense of made available for
download, not in the sense of software engineering and doing a proper
"release".

Release information here:

http://lists.alioth.debian.org/pipermail/pkg-dhcp-devel/2012-April/001275.html

Any ways as you can see it's had a CVE assigned:

So for Debian Bug report logs - #690532
CVE-2012-2248: build system paths used in -DCLIENT_PATH

So my work here is done =).

Best wishes, Mike




- -- 
Kurt Seifried Red Hat Security Response Team (SRT)
PGP: 0x5E267993 A90B F995 7350 148F 66BF 7554 160D 4553 5E26 7993

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://www.enigmail.net/
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=hjvB
-----END PGP SIGNATURE-----


  By Date           By Thread  

Current thread:
[ Nmap | Sec Tools | Mailing Lists | Site News | About/Contact | Advertising | Privacy ]