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? -- John Baldwin _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-security To unsubscribe, send any mail to "[email protected]"
