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  1. #1
    Join Date
    Sep 2008
    Location
    NL,IR
    Posts
    1,491

    how disable SUID/GUID

    hello is it important to disable SUID/GUID ?

    how can we do it and why its not secure to enable them

    tnx

  2. #2
    Join Date
    Nov 2003
    Location
    Kherson, Ukraine
    Posts
    267
    You need to be VERY careful if you using custom programs with suid/guid.
    But it safe enough if you using system utilities like Apache's suexec. Sure, you need to keep your system up to date.
    Private remote administrator of Linux servers - www.petrov.ks.ua
    Quality hosting - Host-Web-Site.com

  3. #3
    Join Date
    Apr 2010
    Posts
    44
    Hello,

    When SUID is set, the executable which has the SUID set runs with the ownership of the program owner. That is, if you own an executable, and another person issues the executable, then it runs with your permission and not his. The default is that a program runs with the ownership of the person executing the binary.

    The SGID bit is the same as of SUID, only the case is that it runs with the permission of the group. Another use is it can be set on folders,making nay files or folders created inside the SGID set folder to have a common group ownership.

    SGID and SUID programs can be used by a cracker or a hacker to gain elevated permissions on a system. Thus the server can be compromised. It is advisable not to set SUID and SGID for files and folders under home directory of a user.

  4. #4
    Join Date
    Mar 2010
    Posts
    999
    You can find more information about it here--

    support.microsoft.com/kb/931709

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