Full Disclosure mailing list archives
Re: Possibility to exploit bash "*" processing
From: Valdis.Kletnieks () vt edu
Date: Wed, 21 Sep 2011 12:55:33 -0400
On Wed, 21 Sep 2011 16:01:24 +0300, Dan Carpenter said:
Seems like a good time to promote David Wheeler's filename proposal: http://www.dwheeler.com/essays/fixing-unix-linux-filenames.html
Unfortunately, David Wheeler's proposal has some implementation issues: 1. Forbid/escape ASCII control characters (bytes 1-31 and 127) in filenames, including newline, escape, and tab. 3. Forbid/escape filenames that aren't a valid UTF-8 encoding. The problem is that the UTF-8 codespace consists *mostly* of multibyte characters, wherein at least one of the bytes, when considered by itself, is an ASCII control character. So if you restrict filenames to valid UTF-8, you *still* lose if the filename is parsed by a non-UTF-8-aware program. And if you eliminate those valid UTF-8 names that include bytes that are ASCII control characters, you just prevented *most* valid UTF-8 names. On the other hand, it's a really nice summary of the issues and *does* have a lot of good info - I hadn't seen that particular use of GLOBIGNORE, for instance. Bottom line - supporting filenames humans actually want to use (as opposed to a fascist FAT 8+3 format) is *hard*. ;)
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Current thread:
- Possibility to exploit bash "*" processing Kirils Solovjovs (Sep 20)
- Re: Possibility to exploit bash "*" processing Valdis . Kletnieks (Sep 20)
- Re: Possibility to exploit bash "*" processing GloW - XD (Sep 20)
- Re: Possibility to exploit bash "*" processing Cédric Jeanneret (Sep 21)
- Re: Possibility to exploit bash "*" processing Jacqui Caren (Sep 21)
- Re: Possibility to exploit bash "*" processing Dan Carpenter (Sep 21)
- Re: Possibility to exploit bash "*" processing Valdis . Kletnieks (Sep 21)
- Re: Possibility to exploit bash "*" processing Andrew Farmer (Sep 21)
- Re: Possibility to exploit bash "*" processing Valdis . Kletnieks (Sep 21)
- Re: Possibility to exploit bash "*" processing Valdis . Kletnieks (Sep 21)
- Re: Possibility to exploit bash "*" processing Valdis . Kletnieks (Sep 20)