From: Karel Zak <kzak@redhat.com>
To: halfdog <me@halfdog.net>
Cc: util-linux@vger.kernel.org
Subject: Re: util-linux mount/unmount ASLR bypass via environment variable
Date: Fri, 12 Jan 2018 11:15:59 +0100 [thread overview]
Message-ID: <20180112101559.rm2k4qbhi7kyufma@ws.net.home> (raw)
In-Reply-To: <820-1515696719.436169@jYEA.ctRK.4WZD>
On Thu, Jan 11, 2018 at 06:51:59PM +0000, halfdog wrote:
> Cleaning up another issue, I noticed that I haven't reported this
> one yet. Debugging of libmount can be activated, also in SUID binaries,
This is expected and wanted ;-)
> thus spilling out the heap addresses.
Good point. Fixed, now for SUIDs it's without the addresses:
$ LIBMOUNT_DEBUG=all mount
18622: libmount: CXT: ----> allocate [RESTRICTED]
18622: libmount: TAB: alloc
18622: libmount: CACHE: alloc
18622: libmount: TAB: mtab parse: #1 read mountinfo
18622: libmount: TAB: /proc/self/mountinfo: start parsing [entries=0, filter=not]
18622: libmount: TAB: add entry: sysfs /sys
18622: libmount: CACHE: canonicalize path /proc/self/mountinfo
...
Thanks!
Karel
--
Karel Zak <kzak@redhat.com>
http://karelzak.blogspot.com
next prev parent reply other threads:[~2018-01-12 10:16 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-11 18:51 util-linux mount/unmount ASLR bypass via environment variable halfdog
2018-01-12 10:15 ` Karel Zak [this message]
2018-01-12 11:50 ` Peter Cordes
2018-01-12 12:47 ` Karel Zak
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