From: Bruce Barnett <spamhater42+U030124070218@grymoire.com>
Subject: Re: NON-trivial regular expression problem (could not find on google)
Date: 24 Jan 2003 11:20:11 GMT [thread overview]
Message-ID: <b0r7hb$3uo$0@208.20.133.66> (raw)
In-Reply-To: 7606630f.0301181219.60384da2@posting.google.com
democrat@india.com (Instant Democracy) writes:
> The task is to eliminate patterns such as
> DIRNAME/../
> from the path because they are redundant.
I assume that you are also trying to deal with security issues.
(Someone trying deliberately to gain access to fles outside of a directory)
Don't forget to include these cases:
DIRNAME/./../
DIRNAME/././../ etc.
And also consider whatever quoting/conversions might occur.
Hex encoding? Backslashes?
How are "//" interpreted? Some cases these are treated as a single slash.
Other cases it's the top of the directory.
A/DIRNAME//../ - is this A, or / ?
--
Sending unsolicited commercial e-mail to this account incurs a fee of
$500 per message, and acknowledges the legality of this contract.
prev parent reply other threads:[~2003-01-24 11:20 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-01-18 20:19 NON-trivial regular expression problem (could not find on google) Instant Democracy
2003-01-18 21:38 ` Harry Putnam
2003-01-18 21:46 ` Kai Großjohann
2003-01-18 22:52 ` AW
2003-01-18 23:03 ` Edi Weitz
2003-01-19 0:27 ` Larry Clapp
2003-01-19 0:36 ` Dr. Yuan Liu
2003-01-19 0:53 ` John W. Krahn
2003-01-19 1:05 ` William Park
2003-01-19 12:17 ` Peter J. Acklam
2003-01-19 19:26 ` Dr. Yuan Liu
2003-01-20 9:15 ` Peter J. Acklam
2003-01-24 18:56 ` Yuan Liu
2003-01-24 11:20 ` Bruce Barnett [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='b0r7hb$3uo$0@208.20.133.66' \
--to=spamhater42+u030124070218@grymoire.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.