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Date: Thu, 20 Nov 2014 21:35:02 +0000
From: "Mehaffey, John" <John_Mehaffey@...tor.com>
To: mancha <mancha1@...o.com>, "oss-security@...ts.openwall.com"
<oss-security@...ts.openwall.com>
CC: "falonsoe@...hat.com" <falonsoe@...hat.com>
Subject: RE: CVE-2014-7817 glibc: command execution in
wordexp() with WRDE_NOCMD specified
> From: mancha [mancha1@...o.com]
> Sent: Thursday, November 20, 2014 11:17 AM
> To: oss-security@...ts.openwall.com
> Cc: falonsoe@...hat.com
> Subject: Re: [oss-security] CVE-2014-7817 glibc: command execution in wordexp() with WRDE_NOCMD specified
>
> On Thu, Nov 20, 2014 at 11:38:20AM -0500, Francisco Alonso wrote:
> > Hello,
> >
> > It was discovered that the wordexp() function could ignore the WRDE_NOCMD flag under certain input conditions resulting in the execution
> > of a shell for command substitution when the applicaiton did not request it.
> >
> > Bug report:
> > https://sourceware.org/bugzilla/show_bug.cgi?id=CVE-2014-7817
> >
> > Git commit:
> > https://sourceware.org/git/gitweb.cgi?p=glibc.git;a=commitdiff;h=a39208bd7fb76c1b01c127b4c61f9bfd915bfe7c
> >
> > References:
> > https://bugzilla.redhat.com/show_bug.cgi?id=1157689
> > https://sourceware.org/ml/libc-alpha/2014-11/msg00519.html
>
> Francisco, thanks for the post.
>
> After a lightning review of one of my systems, I found the following use
> glibc's wordexp: adobe's flash plugin, ardour2, mailx, enca. I've not
> looked into which input is under a would-be-attacker's control.
>
> --mancha
alsa-lib is also affected.
-mehaf
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