svn commit: r228843 - head/contrib/telnet/libtelnet
head/include head/lib/libc/gen head/lib/libc/iconv head/lib/libc/include
delphij at delphij.net
Thu Dec 29 18:44:02 UTC 2011
-----BEGIN PGP SIGNED MESSAGE-----
On 12/29/11 10:43, John Baldwin wrote:
> On Thursday, December 29, 2011 1:26:17 pm Xin Li wrote:
>> On 12/29/11 06:39, John Baldwin wrote:
>>> Can you give some more details on why ftpd is triggering a
>>> dlopen inside of the chroot? It would appear that that is
>>> unrelated to helper programs (since setting a flag in libc in
>>> ftpd can't possibly affect helper programs ability to use
>>> dlopen() from within libc).
>> Sure. That's because nsdispatch(3) would reload
>> /etc/nsswitch.conf if it notices a change. After chroot() the
>> file is considered as "chang"ed and thus it reloads the file as
>> well as designated shared libraries.
> But ftpd has to be doing some operation that invokes an nss lookup
> after entering the chroot for that to trigger, correct?
Oh ok, that was the built-in ls(1).
Xin LI <delphij at delphij.net> https://www.delphij.net/
FreeBSD - The Power to Serve! Live free or die
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.18 (FreeBSD)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
-----END PGP SIGNATURE-----
More information about the freebsd-security