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Full Discussion: chmod 777 security risks?
Top Forums UNIX for Dummies Questions & Answers chmod 777 security risks? Post 302097261 by Gary777 on Wednesday 22nd of November 2006 11:13:49 PM
Old 11-23-2006
Thanks Blowtorch

Thanks for the reply Blowtorch,

I am still not clear about the answer though... Lets say someone broke into my garage and the files were not chmod'ed 666 or 777, (all files are 644 right now) are you saying that all they can do is look around and read files? But if the files were 666 or 777 they could do whatever they want to?

Are you also saying that it's possible to gain access to public_html (for instance) but not the root directories?

Ok, regarding my partner, he is not computer savvy but he knows a little HTML, SnippetMaster allows users to "edit LIVE html in the page" from their browser, you can define "snippet" areas within a page that are editable, there are different user levels where you can set different rights/areas that they can edit (it's actually very cool!) The user doesn't need to know; how to use FTP, how to upload or how to do other backend tasks, they just log-in and edit parts of a live page in a WYSIWYG editor within their browser. I use a lot of SSI, PHP, JS and CGI code on our web site and it's possible he could really mess things up if he has upload access.

Lastly, let me ask a question, should I absolutely not chmod 666 or 777 my .shtml and .html files? I guess I could chmod only the base html files that I include via SSI but that means a LOT more work for me...

Happy Holidays!

Gary
 

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mkdir(1)							   User Commands							  mkdir(1)

NAME
mkdir - make directories SYNOPSIS
mkdir [-m mode] [-p] dir... DESCRIPTION
The mkdir command creates the named directories in mode 777 (possibly altered by the file mode creation mask umask(1)). Standard entries in a directory (for instance, the files ".", for the directory itself, and "..", for its parent) are made automatically. mkdir cannot create these entries by name. Creation of a directory requires write permission in the parent directory. The owner-ID and group-ID of the new directories are set to the process's effective user-ID and group-ID, respectively. mkdir calls the mkdir(2) system call. setgid and mkdir To change the setgid bit on a newly created directory, you must use chmod g+s or chmod g-s after executing mkdir. The setgid bit setting is inherited from the parent directory. OPTIONS
The following options are supported: -m mode This option allows users to specify the mode to be used for new directories. Choices for modes can be found in chmod(1). -p With this option, mkdir creates dir by creating all the non-existing parent directories first. The mode given to intermedi- ate directories will be the difference between 777 and the bits set in the file mode creation mask. The difference, how- ever, must be at least 300 (write and execute permission for the user). OPERANDS
The following operand is supported: dir A path name of a directory to be created. USAGE
See largefile(5) for the description of the behavior of mkdir when encountering files greater than or equal to 2 Gbyte ( 2**31 bytes). EXAMPLES
Example 1: Using mkdir The following example: example% mkdir -p ltr/jd/jan creates the subdirectory structure ltr/jd/jan. ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of mkdir: LANG, LC_ALL, LC_CTYPE, LC_MES- SAGES, and NLSPATH. EXIT STATUS
The following exit values are returned: 0 All the specified directories were created successfully or the -p option was specified and all the specified directories now exist. >0 An error occurred. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |CSI |enabled | +-----------------------------+-----------------------------+ |Interface Stability |Standard | +-----------------------------+-----------------------------+ SEE ALSO
rm(1), sh(1), umask(1), intro(2), mkdir(2), attributes(5), environ(5), largefile(5), standards(5) SunOS 5.10 1 Feb 1995 mkdir(1)
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