`setuid` is a file permission flag under Unix-like systems that will run an executable with the file owner's permissions rather than the invoking user's. On some systems (FreeBSD), it further works identically to the related `setgid` flag on directories, causing new files to inherit the directory's permissions rather than the current user's.
Questions tagged [setuid]
254 questions
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1 answer
Need help improving a small C program
I wanted to launch a bash script (read: bash not sh script) as a root not as the user calling it, however bash ignore setuid on scripts, so I chose to write a very small script that takes a script/arguments and call it with setuid set.
This worked…
kalbasit
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1 answer
How to set a specific setuid in a shellcode
I'm using the following assembly code found here to setuid(0) and get a shell during a buffer overflow
xor rdi,rdi
mov al,0x69
syscall
xor rdx,rdx
movabs rbx,0x68732f6e69622fff
shr rbx,0x8
push rbx
mov rdi,rsp
xor rax,rax
push …
l1ge
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- 3
0
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0 answers
Passing value to modified syscall function gets changed
I am trying to pass uid_t value as a parameter to modified syscall function (set_uid) and when I pass 30 from caller function, the value gets changed to random number such as 2154135383.
This is modified setuid()
asmlinkage int new_setuid(uid_t…
ctsmicha
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- 1
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Running jailkit from non-root process
I have a webserver which will frequently spawn a latex interpreter (written in python). This interpreter lives inside a chroot jail made using jailkit so it has to be started as root.
I don't want the server to run as root and I can't setuid the…
0
votes
1 answer
How to make nscd generate core dump files?
nscd service crashed without a core dump file.
ulimit -c is unlimited.
Someone says that that's because nscd use "setuid" when the "server-user" is set in /etc/nscd.conf.
Then I added a "#" to delete it at the beginning of the "server-user" line in…
june an
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0 answers
setuid must be string getting error when trying to deploy my node js app to google cloud platform
I m getting this error when I try to deploy it to google cloud platform.
I m using Redis NODEjs
Error msg:
Unhandled rejection StatusCodeError: 401 - "{\"error\":\"Something strange occurred. Please contact the app…
Qalib Abbas
- 11
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1 answer
setuid on svn update wrapper not working?
I have an svn repository which belongs to user 'foo' and is accessed through Apache, and I'm trying to run svn update from the post-commit hook, on a directory which is also owned by foo.
I created a C wrapper owned by foo and setted the suid bit,…
Ivan
- 1
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setuid bit on shared object
I know that to have a .so loaded, the e'x'ecute bit must be set. However, I wonder what is the effect of +s (setuid) bit on the .so ?
If the main program is not "setuid" set, but the .so it loads is setuid, does it change the uid ? I found not but…
Bhasker
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- 1
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1 answer
composer gives false warning when run as a non-root user with setuid bit set
I configured my php executable i.e /usr/local/bin/php with a setuid for user deploy. So that if any user calls that php binary it should be executed as deploy only. As you can see below php binary is chowned by a non-root user deploy. But when I…
SkyRar
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run setuid as www-data in python
I have a python script running as www-data but I would like it to have separate r/w/e permissions to the rest of the scripts. So I created a user to use however can't get the script to run as that user (it's a cgi script and I want all but this one…
Joseph Walden
- 11
- 1
0
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1 answer
Questions about setuid
I have a problem with running the following C program:
#include
void main()
{
if (access("/root/main.c",R_OK)==0)
{
printf("/root/main.c can be read\n");
}
else
{
printf("can't be read\n");
…
lwp007
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0 answers
setuid(###) followed by getuid() fails in C program with permissions bit set
I'm trying something very simple with setuid followed by getuid in a C program that is not working unless the user is the owner of the c program. I am setting the permissions bit using chmod 7777 in addition to thesetuid. Here is the C…
daveg
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0 answers
setuid not working, linux rhel6, simple example
This is a repost after being referred to "Calling a script from a setuid root C program - script does not run as root" for a solution
My problem is different in that I do not want to run the C program (and c-shell script called inside) as root. …
daveg
- 1,051
- 11
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0
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1 answer
Trying to understand buffer-overflow and setuid. I don't get privileges
I am trying to understand about buffer overflow and setuid. I use this source :
#include
#include
#include
int main(void){
char prog[]="/bin/ls -hal";
char in[8]={0};
printf("Name of a dir to list : ");
…
user6125411
0
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1 answer
setuid has same effect as sudo?
does setting uid has the same effect that sudo has?
What happens if setuid'ed executable open whoami with popen? Do I get 'root'?
manatails008
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