Is setuid safe?

setuid and setgid files are dangerous because they might give an unauthorized user root access, or at least access to run a program in another user’s name. However, it is very difficult to be so sure, as hackers may have cracked root’s password.

Are shell scripts dangerous?

Although they are less harmful for scripts these days (because scripts cannot be run setuid in any modern OS), they can still cause incorrect behavior. For setuid binaries, they are even more dangerous.

What are the disadvantages of shell scripting?

Disadvantages of shell scripts

• Prone to costly errors, a single mistake can change the command which might be harmful.
• Slow execution speed.
• Design flaws within the language syntax or implementation.
• Not well suited for large and complex task.
• Provide minimal data structure unlike other scripting languages. etc.

Is the shell script sensitive?

Yes. Bash scripts are sensitive to line-endings, both in the script itself and in data it processes.

What is the purpose of setuid and setgid bits?

The Unix access rights flags setuid and setgid (short for “set user ID” and “set group ID”) allow users to run an executable with the file system permissions of the executable’s owner or group respectively and to change behaviour in directories.

Can shell scripts be run on Windows?

With the arrival of Windows 10’s Bash shell, you can now create and run Bash shell scripts on Windows 10. You can also incorporate Bash commands into a Windows batch file or PowerShell script.

How do shell scripts work?

The basic steps involved with shell scripting are writing the script, making the script accessible to the shell and giving the shell execute permission. Shell scripts contain ASCII text and are written using a text editor, word processor or graphical user interface (GUI).

What are advantages of shell script?

Advantages and disadvantages The many advantages include easy program or file selection, quick start, and interactive debugging. A shell script can be used to provide a sequencing and decision-making linkage around existing programs, and for moderately sized scripts the absence of a compilation step is an advantage.

What is difference between shell and bash scripting?

Shell scripting is scripting in any shell, whereas Bash scripting is scripting specifically for Bash. In practice, however, “shell script” and “bash script” are often used interchangeably, unless the shell in question is not Bash.

How do you ignore a case in Unix?

Case-insensitive file searching with the find command The key to that case-insensitive search is the use of the -iname option, which is only one character different from the -name option. The -iname option is what makes the search case-insensitive.

Are all Bash variables strings?

Unlike many other programming languages, Bash does not segregate its variables by “type.” Essentially, Bash variables are character strings, but, depending on context, Bash permits arithmetic operations and comparisons on variables.

Can a shell script exploit a setuid file?

A attacker can exploit setuid binaries using a shell script or by providing false data. Users normally should not have setuid programs installed, especially setuid to users other than themselves. For example, you should not find setuid enabled binary for root under /home/vivek/crack. These are usually Trojan Horses kind of programs.

Why does Linux ignore the setuid bit on shell scripts?

Due to the increased likelihood of security flaws, many operating systems ignore the setuid attribute when applied to executable shell scripts. Assuming I’m willing to accept those risks, is there any way to tell Linux to treat the setuid bit the same on shell scripts as it does on executables? If not, is there a common workaround for this problem?

Is there a security problem with a setuid?

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 arguments by modifying the IFS environment variable.) As others have mentioned, this is by design.

Is it safe to install setuid on root?

Setuid Programs Risk. A attacker can exploit setuid binaries using a shell script or by providing false data. Users normally should not have setuid programs installed, especially setuid to users other than themselves. For example, you should not find setuid enabled binary for root under /home/vivek/crack.

https://www.youtube.com/watch?v=2gHp_CgUets