Re: libarchive update SVN r299529 breaks "ezjail update"

On Sat, 2016-05-14 at 15:51 -0400, michael butler wrote:
>  From the looks of this, I think it's likely better to have the
> default 
> be "secure" and ezjail-admin use the "--insecure" flag as an explicit
> override. That's the only place I've noticed the need for it although
> I've not done an extensive search for any other instances in which it
> might be required,
> 
> 	imb
> 

The real damage will happen to out-of-tree users.  I think this will
impact our software updater for $work for example, and it has to work
with both old and new versions of libarchive, and now the new version
will require a flag that the old version will reject as unknown.

Ick.

-- Ian

> On 5/14/2016 3:46 PM, Tim Kientzle wrote:
> > A little history about this issue:
> > 
> > http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2304
> > 
> > 
> > > On May 14, 2016, at 12:17 PM, Tim Kientzle <tim_at_kientzle.com>
> > > wrote:
> > > 
> > > Many people consider the traditional behavior to be a security
> > > risk, which is why this was changed.
> > > 
> > > FreeBSD is welcome to make --insecure the default on FreeBSD, but
> > > I'm reluctant to do that in the upstream libarchive project.
> > > 
> > > Tim
> > > 
> > > 
> > > > On May 12, 2016, at 8:54 AM, Martin Matuska <mm_at_freebsd.org>
> > > > wrote:
> > > > 
> > > > Looks like we have to remove line #174 from cpio/cpio.c:
> > > > cpio->extract_flags |= ARCHIVE_EXTRACT_SECURE_NOABSOLUTEPATHS;
> > > > 
> > > > This breaks traditional cpio behavior.
> > > > 
> > > > Quoting Martin Matuska <mm_at_freebsd.org>:
> > > > 
> > > > > Hi Michael, I have looked at the source and this is an
> > > > > intended change in 3.2.0.
> > > > > 
> > > > > An absolute path security check was added, cpio refuses to
> > > > > extract or copy over absolute paths. To do this anyway the "-
> > > > > -insecure" flag must be used.
> > > > > 
> > > > > Here is the commit:
> > > > > https://github.com/libarchive/libarchive/commit/59357157706d4
> > > > > 7c365b2227739e17daba3607526
> > > > > 
> > > > > Quoting Michael Butler <imb_at_protected-networks.net>:
> > > > > 
> > > > > > It seems that today's libarchive update breaks cpio's
> > > > > > behaviour:
> > > > > > 
> > > > > > sudo ezjail-admin update -i -s /usr/src
> > > > > > 
> > > > > > [ .. ]
> > > > > > 
> > > > > > cd /usr/src/etc/..; install -o root -g wheel -m 444 
> > > > > >  COPYRIGHT
> > > > > > /usr/local/jails/fulljail/
> > > > > > install -o root -g wheel -m 444
> > > > > > /usr/src/etc/../sys/i386/conf/GENERIC.hints
> > > > > > /usr/local/jails/fulljail/boot/device.hints
> > > > > > /usr/local/jails/basejail/bincpio: bin: Path is absolute:
> > > > > > Unknown error: -1
> > > > > > 
> > > > > > /usr/local/jails/basejail/bin/catcpio: bin/cat: Path is
> > > > > > absolute:
> > > > > > Unknown error: -1
> > > > > > 
> > > > > > /usr/local/jails/basejail/bin/chflagscpio: bin/chflags:
> > > > > > Path is
> > > > > > absolute: Unknown error: -1
> > > > > > 
> > > > > > /usr/local/jails/basejail/bin/chiocpio: bin/chio: Path is
> > > > > > absolute:
> > > > > > Unknown error: -1
> > > > > > 
> > > > > > /usr/local/jails/basejail/bin/chmodcpio: bin/chmod: Path is
> > > > > > absolute:
> > > > > > Unknown error: -1
> > > > > > 
> > > > > > /usr/local/jails/basejail/bin/cpcpio: bin/cp: Path is
> > > > > > absolute: Unknown
> > > > > > error: -1
> > > > > > 
> > > > > > /usr/local/jails/basejail/bin/datecpio: bin/date: Path is
> > > > > > absolute:
> > > > > > Unknown error: -1
> > > > > > 
> > > > > > /usr/local/jails/basejail/bin/ddcpio: bin/dd: Path is
> > > > > > absolute: Unknown
> > > > > > error: -1
> > > > > > 
> > > > > > /usr/local/jails/basejail/bin/dfcpio: bin/df: Path is
> > > > > > absolute: Unknown
> > > > > > error: -1
> > > > > > 
> > > > > > /usr/local/jails/basejail/bin/domainnamecpio:
> > > > > > bin/domainname: Path is
> > > > > > absolute: Unknown error: -1
> > > > > > [ .. etc. .. ]
> > > > > 
> > > > > 
> > > > > 
> > > > > Martin Matuska
> > > > > FreeBSD committer
> > > > > http://blog.vx.sk
> > > > 
> > > > 
> > > > 
> > > > Martin Matuska
> > > > FreeBSD committer
> > > > http://blog.vx.sk
> > > 
> > 
> _______________________________________________
> freebsd-current_at_freebsd.org mailing list
> https://lists.freebsd.org/mailman/listinfo/freebsd-current
> To unsubscribe, send any mail to "
> freebsd-current-unsubscribe_at_freebsd.org"