On Fri, 21 Aug 2015 13:57:48 -0500, Paul Gilmartin <[email protected]> wrote:
>On Fri, 21 Aug 2015 13:04:47 -0500, Mark Zelden wrote: > >>> >>>(And long ago, MVS-OE mentioned "charcase lower" as a preventive.) >>> >I believe this was not in the original design, but provided at a later release >in order to forestall the DoS exposure. > >>>Suppose you have "/u/mzelden". While it's unmounted I do "cd /u/MZelden". >>>Automount issues (something like) an ENQ EXC on MZELDEN.TPLEX.ZFS. >>>While that's in effect you can't mount "/u/mzelden". Not a DoS of your >>>entire system, just of your HOME. (At least this applied to HFS; zFS >>>might be different.) >> >>So, OMVS / ZFS address spaces have the access and it gets mounted >>in a microsecond on my very fast z13 with flash disk. :-) >> >Not for only a microsecond, but for at least as long as it takes to time >out and dismount. And if I can "cd /u/MZelden", for as long as I tarry >there. But that requires that I have at least search authority on the >directory. > >>But seriously, where's the exposure? >> >I believe IBM covered it because they perceived it. Can you try "cd >/u/MZelden" >and observe the result? > SY01:MZELDEN:/u/mzelden:$ cd /u/MZelden cd: /u/MZelden: EDC5121I Invalid argument. SY01:MZELDEN:/u/mzelden:$ Regards, Mark -- Mark Zelden - Zelden Consulting Services - z/OS, OS/390 and MVS ITIL v3 Foundation Certified mailto:[email protected] Mark's MVS Utilities: http://www.mzelden.com/mvsutil.html Systems Programming expert at http://search390.techtarget.com/ateExperts/ ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: INFO IBM-MAIN
