Re: CVE-2016-0634 code execution in Bash prompt when expanding hostname
On Thu, Sep 22, 2016 at 12:42:15AM +0900, Ludovic Courtès wrote: > John Darrington 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?
Re: CVE-2016-0634 code execution in Bash prompt when expanding hostname
John Darrington 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’.
Re: CVE-2016-0634 code execution in Bash prompt when expanding hostname
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. signature.asc Description: Digital signature
