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
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On 10/17/2012 01:46 PM, Michael Gilbert wrote:
On Wed, Oct 17, 2012 at 3:42 PM, Kurt Seifried wrote:
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On 10/15/2012 02:50 PM, Raphael Geissert wrote:
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.
This issue is caused by the way isc-dhcp is packaged in
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.
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
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 information here:
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
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