* 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 [-- Attachment #1: Type: text/plain, Size: 599 bytes --] 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' -- Avoid eavesdropping. Send strong encrypted email. PGP Public key ID: 1024D/2DE827B3 fingerprint = 8797 A26D 0854 2EAB 0285 A290 8A67 719C 2DE8 27B3 See http://sks-keyservers.net or any PGP keyserver for public key. [-- Attachment #2: Digital signature --] [-- Type: application/pgp-signature, Size: 181 bytes --] ^ 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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