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more hot questions about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Science Other Stack SETUID bit allows execution with the owner right. up vote 34 down vote One way of solving this problem is to call the shell script from a program that can use the setuid bit. Edited to add: Cog is right.

Why did the Winter Soldier kill these characters? But unix systems tend to shy away from mandatory locks, and symbolic links would make a correct lock feature especially difficult and invasive. Prove trigonometric identity under given conditions Proof Binomial Coefficient Identity Should I have doubts if the organizers of a workshop ask me to sign a behavior agreement upfront? But nothing changes!

Suid Shell Script

Basically setuid shell scripts don't work by default http://www.faqs.org/faqs/unix-faq/faq/part4/section-7.html share|improve this answer answered Dec 13 '09 at 13:54 Philip Reynolds 7,3692028 Thanks, I got the point. This site is not affiliated with Linus Torvalds or The Open Group in any way. Join Date Feb 2010 Beans 166 DistroUbuntu 10.10 Maverick Meerkat Re: setuid bit doesn't do the trick!!! String.valueOf strange behaviour Are human fetal cells used to produce Pepsi?

Not the answer you're looking for? Regards, John Eipe http://www.cs-repository.info Adv Reply December 14th, 2010 #6 The Cog View Profile View Forum Posts Private Message Oh go on, throw it. The users are group dev, but the script is owned by group egroup. Perl Suid It used to provide a mechanism to emulate setuid permission bits on systems that don't support it properly.

With sudo, make sure that the env_reset option is turned on, that setenv is off, and that env_file and env_keep only contain innocuous variables. Is Pluto a "proto-planet"? Why Confidence Interval is always wider than Prediction interval? Browse other questions tagged linux bash setuid or ask your own question.

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Setuid Bit Not Working share|improve this answer answered Sep 21 '13 at 22:37 steeldriver 32.6k44478 thank you for your reply. Try our newsletter Sign up for our newsletter and get our top new questions delivered to your inbox (see an example). Does boiling tap water make it potable?

Centos Setuid Not Working

As of 3.x kernels, I think you need to add a call to install_exec_creds in the load_script function, before the call to open_exec, but I haven't tested. bash setuid share|improve this question asked Dec 13 '09 at 13:18 Xiè Jìléi 40231024 add a comment| 5 Answers 5 active oldest votes up vote 3 down vote accepted Try exec Suid Shell Script Browse other questions tagged linux bash shell suid or ask your own question. Redhat Setuid Not Working Contradiction between Analytic and Numerical Integration Does any organism use both photosynthesis and respiration?

sh:~# cp /bin/bash /bin/ape sh:~# chmod +s /bin/ape sh:~**$** /bin/ape -p ape-3.2# share|improve this answer edited Nov 7 '11 at 15:08 answered Sep 17 '10 at 11:34 3molo 3,61721738 1 I'm not sure however if they are inherited. Now try ./embedded '$(rm -rf /)'. I've tested it with this simple shell script: #!/bin/bash #list root's directory echo I am $(whoami) ls /root the script is in /usr/local/bin and owned by root, is executable by all Setuid Not Working Linux

Inconsistent size of parentheses in Latin Modern and Computer Modern What is wrong in this arithmetic with looping? its something like sudo. The time now is 02:22 AM. Not the answer you're looking for?

Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the Linux Setuid Example It's a security feature, and tells the system to recognize/ignore setuid executables on the mounted medium. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed

Multivariable limit - perhaps a trickier problem I am stuck on.

Chess : The Lone King Contradiction between Analytic and Numerical Integration Creating a labeled grid of colored squares What is the best way to save values (like strings) for later use? Browse other questions tagged bash setuid or ask your own question. I'm technical referent but I lost the lead for technical decisions Chess : The Lone King Is it legal to index into a struct? C Setuid Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the

in the directory to find the mount point, then mount | grep nameofmountpoint. Setuid doesn't seem to work anymore6Why does setuid not work?2what is the purpose of setuid enabled with no executable bit?1Why the S_ISUID and S_ISGID mode bits got cleared when the owner I'll post a example here. Why would a Teen TV show needed a FBI warning inside Young Justice universe?

Do I need an Indie Studio Name? What could cause humanity to migrate from land to water? While a setuid is always a potential security vulnerability this is extra so when dealing with shell scripts. (The classic problem is having someone fool around with what is considered separate On many unices, you can configure the search path for dynamic libraries through the environment (LD_LIBRARY_PATH is a common name for the environment variable), and even load additional libraries into all

And later even FSUID, just to be sure...: getuid() = 1000 setfsuid(1000) = 1000 getgid() = 1001 setfsgid(1001) = 1001 In the end: no chance. I don't know what's wrong here. These Aren't Roasted! To be able to run executable as root, execute: sudo chown 0:0 ./setuid-test share|improve this answer edited Aug 19 '14 at 15:10 Patrick 35.1k782131 answered Aug 19 '14 at 15:09 hon

Have you opened a security hole? The invoker of the program can execute arbitrary code in that program's context by placing a specially-crafted libc.so in $LD_LIBRARY_PATH (amongst other tactics). Does anybody know why is this happening? asked 2 years ago viewed 479 times active 2 years ago Blog How We Make Money at Stack Overflow: 2016 Edition Stack Overflow Podcast #94 - We Don't Care If Bret

Fortunately. UNIX is a registered trademark of The Open Group. This is because perl ships with a setuid root helper that performs the necessary checks and reinvokes the interpreter on the desired scripts with the desired privileges. From 'perldoc perlsec': Perl can emulate the setuid and setgid mechanism when it notices the otherwise useless setuid/gid bits on Perl scripts.

But do run ./embedded '($whoami)'. share|improve this answer edited May 3 '13 at 4:57 answered May 3 '13 at 4:48 Hauke Laging 33.9k55496 add a comment| up vote 2 down vote In any case, a SUID The kernel inserts the path to the script to the argument list (as argv[1]), and executes the interpreter. Both are member's of "dev" group.

It seems it works on both executables and non-executables. Why do solar planes have many small propellers instead of fewer large ones? A few unix systems (mainly OpenBSD, NetBSD and Mac OS X, all of which require a kernel setting to be enabled) implement secure setuid shebang using an additional feature: the path /dev/fd/N refers Tango Icons Tango Desktop Project.