
Using the setuid bit properly - Unix & Linux Stack Exchange
Make a C wrapper, intended to be used in the shebang line. Setuid it root. Just after start, wrapper will check if script given as an argument is setuid/setgid. if no - drop root priv. if yes - change …
Allow setuid on shell scripts - Unix & Linux Stack Exchange
If setuid scripts are allowed with this implementation, an attacker can invoke an arbitrary script by creating a symbolic link to an existing setuid script, executing it, and arranging to change the …
How are setuid, suid, sudo, and su all related? [duplicate]
2016年1月26日 · When mount use this option then the file system doesn't allow set-user-identifier (setuid) or set-group-identifier (setgid) bits to take effect. sudo: executes a command as …
Is it possible to apply setuid only for a specific user?
2018年11月18日 · The setuid bit is not included in access control lists. It is either on for a file or off. You can get partially toward your goal. You can allow only certain users to execute a …
permissions - Why setuid does not work on executable? - Unix
I know that enabling setuid on scripts has security issues and so is inactive by default, but expect that it works for executables. I created and executable which shows uid as an output following …
setuid - How do real and effective user IDs work? - Unix & Linux …
2018年2月9日 · An early hack in Unix was to make a symbolic link to a setuid shell script and call the link -i. This results in the script being called as sh -i which instead of executing the script …
File permission with setuid and octal 4000 - Unix & Linux Stack …
Setuid, Setgid and Sticky Bits are special types of Unix/Linux file permission sets that permit certain users to run specific programs with elevated privileges. Ultimately the permissions that …
Root privileges can be restored after setuid(1000) in musl libc
musl libc allows you to change uid to root even after supposedly dropping permissions with setuid(1000). I am not able to reproduce the problem with glibc. Code: #define …
setuid - Podman Outer Container Fails to Gracefully Stop with …
2025年1月22日 · In a Podman-in-Podman case, the outer container fails to stop gracefully with SIGTERM when specific capabilities (cap_setuid and cap_setgid) are set to enable the use of …
setuid - why do we need the SUID permission? - Unix & Linux …
2018年9月25日 · This would clearly cause a lot of problems, to mention a few: every root owned executable would need to do UID checks and call setuid() to set process' EUID back to non …