* CVE-2016-0634 code execution in Bash prompt when expanding hostname
@ 2016-09-20 20:55 Leo Famulari
2016-09-21 5:20 ` John Darrington
0 siblings, 1 reply; 7+ messages in thread
From: Leo Famulari @ 2016-09-20 20:55 UTC (permalink / raw)
To: guix-devel
Any advice on how we should handle CVE-2016-0634?
http://seclists.org/oss-sec/2016/q3/534
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: CVE-2016-0634 code execution in Bash prompt when expanding hostname
2016-09-20 20:55 CVE-2016-0634 code execution in Bash prompt when expanding hostname Leo Famulari
@ 2016-09-21 5:20 ` John Darrington
2016-09-21 15:42 ` Ludovic Courtès
0 siblings, 1 reply; 7+ messages in thread
From: John Darrington @ 2016-09-21 5:20 UTC (permalink / raw)
To: Leo Famulari; +Cc: guix-devel
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On Tue, Sep 20, 2016 at 04:55:30PM -0400, Leo Famulari wrote:
Any advice on how we should handle CVE-2016-0634?
http://seclists.org/oss-sec/2016/q3/534
Like the comment there says, it is only a problem if the machine has already been owned, so I don't
see what the issue is. If there is an issue it is for the bash maintainers to patch.
J'
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^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: CVE-2016-0634 code execution in Bash prompt when expanding hostname
2016-09-21 5:20 ` John Darrington
@ 2016-09-21 15:42 ` Ludovic Courtès
2016-09-27 21:26 ` Leo Famulari
0 siblings, 1 reply; 7+ messages in thread
From: Ludovic Courtès @ 2016-09-21 15:42 UTC (permalink / raw)
To: John Darrington; +Cc: guix-devel
John Darrington <john@darrington.wattle.id.au> skribis:
> On Tue, Sep 20, 2016 at 04:55:30PM -0400, Leo Famulari wrote:
> Any advice on how we should handle CVE-2016-0634?
>
> http://seclists.org/oss-sec/2016/q3/534
>
> Like the comment there says, it is only a problem if the machine has
> already been owned,
… or if a privilege application like a DHCP client can be made to set
the host name to $(something bad), which was apparently possible at some
point.
> so I don't see what the issue is. If there is an issue it is for the
> bash maintainers to patch.
Chet proposed a patch:
http://seclists.org/oss-sec/2016/q3/att-538/prompt-string-comsub.patch
IIUC, the just-released 4.4 isn’t affected, right?
We should at least update it in core-updates, but core-updates won’t be
merged until we have fixed that Binutils/MIPS issue (which shouldn’t be
too hard, but we never know!).
I’m somewhat unavailable these days; could someone look into it?
Thanks for the heads-up Leo, as usual!
Ludo’.
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: CVE-2016-0634 code execution in Bash prompt when expanding hostname
2016-09-21 15:42 ` Ludovic Courtès
@ 2016-09-27 21:26 ` Leo Famulari
2016-09-30 16:17 ` Bash 4.4 upgrade Ludovic Courtès
0 siblings, 1 reply; 7+ messages in thread
From: Leo Famulari @ 2016-09-27 21:26 UTC (permalink / raw)
To: Ludovic Courtès; +Cc: guix-devel
On Thu, Sep 22, 2016 at 12:42:15AM +0900, Ludovic Courtès wrote:
> John Darrington <john@darrington.wattle.id.au> skribis:
>
> > On Tue, Sep 20, 2016 at 04:55:30PM -0400, Leo Famulari wrote:
> > Any advice on how we should handle CVE-2016-0634?
> >
> > http://seclists.org/oss-sec/2016/q3/534
> >
> > Like the comment there says, it is only a problem if the machine has
> > already been owned,
>
> … or if a privilege application like a DHCP client can be made to set
> the host name to $(something bad), which was apparently possible at some
> point.
>
> > so I don't see what the issue is. If there is an issue it is for the
> > bash maintainers to patch.
Perhaps it's not the most critical bug, but I don't think we can
effectively anticipate the full impact of this (or any) bug. It's better
to just fix it now that we know about it.
> Chet proposed a patch:
>
> http://seclists.org/oss-sec/2016/q3/att-538/prompt-string-comsub.patch
I've asked Chet if he will add the patch to the bash-4.3-patches FTP
directory. If not, we can apply it the "normal" way.
>
> IIUC, the just-released 4.4 isn’t affected, right?
Right.
> We should at least update it in core-updates, but core-updates won’t be
> merged until we have fixed that Binutils/MIPS issue (which shouldn’t be
> too hard, but we never know!).
I spent some time looking at the Bash package definition, but I'm stuck
on how to handle all the Bash %patch-series machinery. There are
currently no patches for Bash 4.4, nor is there an FTP directory
corresponding to a future patch series.
Does anyone have advice on how to proceed?
^ permalink raw reply [flat|nested] 7+ messages in thread
* Bash 4.4 upgrade
2016-09-27 21:26 ` Leo Famulari
@ 2016-09-30 16:17 ` Ludovic Courtès
2016-09-30 17:27 ` Leo Famulari
0 siblings, 1 reply; 7+ messages in thread
From: Ludovic Courtès @ 2016-09-30 16:17 UTC (permalink / raw)
To: Leo Famulari; +Cc: guix-devel
Hi!
Leo Famulari <leo@famulari.name> skribis:
> I spent some time looking at the Bash package definition, but I'm stuck
> on how to handle all the Bash %patch-series machinery. There are
> currently no patches for Bash 4.4, nor is there an FTP directory
> corresponding to a future patch series.
>
> Does anyone have advice on how to proceed?
I started looking at it and will probably push something Real Soon
(turned out to be trickier than I thought because of various changes in
what “make install” does.)
The ‘patch-series’ machinery is quite simple: we list the patches with a
number and their hash, and that’s it. For 4.4, it’s just the empty
list.
Ludo’.
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Bash 4.4 upgrade
2016-09-30 16:17 ` Bash 4.4 upgrade Ludovic Courtès
@ 2016-09-30 17:27 ` Leo Famulari
2016-09-30 22:04 ` Ludovic Courtès
0 siblings, 1 reply; 7+ messages in thread
From: Leo Famulari @ 2016-09-30 17:27 UTC (permalink / raw)
To: Ludovic Courtès; +Cc: guix-devel
On Fri, Sep 30, 2016 at 06:17:42PM +0200, Ludovic Courtès wrote:
> Hi!
>
> Leo Famulari <leo@famulari.name> skribis:
>
> > I spent some time looking at the Bash package definition, but I'm stuck
> > on how to handle all the Bash %patch-series machinery. There are
> > currently no patches for Bash 4.4, nor is there an FTP directory
> > corresponding to a future patch series.
> >
> > Does anyone have advice on how to proceed?
>
> I started looking at it and will probably push something Real Soon
> (turned out to be trickier than I thought because of various changes in
> what “make install” does.)
Sounds good. There is also readline 7.0, which I would have pushed to
core-updates at the same time as Bash.
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: Bash 4.4 upgrade
2016-09-30 17:27 ` Leo Famulari
@ 2016-09-30 22:04 ` Ludovic Courtès
0 siblings, 0 replies; 7+ messages in thread
From: Ludovic Courtès @ 2016-09-30 22:04 UTC (permalink / raw)
To: Leo Famulari; +Cc: guix-devel
Leo Famulari <leo@famulari.name> skribis:
> On Fri, Sep 30, 2016 at 06:17:42PM +0200, Ludovic Courtès wrote:
>> Hi!
>>
>> Leo Famulari <leo@famulari.name> skribis:
>>
>> > I spent some time looking at the Bash package definition, but I'm stuck
>> > on how to handle all the Bash %patch-series machinery. There are
>> > currently no patches for Bash 4.4, nor is there an FTP directory
>> > corresponding to a future patch series.
>> >
>> > Does anyone have advice on how to proceed?
>>
>> I started looking at it and will probably push something Real Soon
>> (turned out to be trickier than I thought because of various changes in
>> what “make install” does.)
>
> Sounds good. There is also readline 7.0, which I would have pushed to
> core-updates at the same time as Bash.
Pushed as c573f5a5a5395d6b5cee3d06cbbc6a19573cf542. Hydra will start
building it soon.
Ludo’.
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2016-09-30 22:04 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2016-09-20 20:55 CVE-2016-0634 code execution in Bash prompt when expanding hostname Leo Famulari
2016-09-21 5:20 ` John Darrington
2016-09-21 15:42 ` Ludovic Courtès
2016-09-27 21:26 ` Leo Famulari
2016-09-30 16:17 ` Bash 4.4 upgrade Ludovic Courtès
2016-09-30 17:27 ` Leo Famulari
2016-09-30 22:04 ` Ludovic Courtès
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