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1. Figure out why "passwd", "chsh", and "su" commands need to be Set-UID programs. What will happen if they are not? If you are not familiar with these programs, you should first learn what they can do. Their source codes are in /usr/src/commands/simple directory.
because if they were not, any user would be able to change passwords, or change things dealing with the os, and they would be just as powerful as the root user. with the those commands being setuid programs, that ensures that roots are the only ones with high access privileges and that normal users are restricted from certain things.
2. Read the OS source codes of Minix, and figure out how SET-UID is implemented in the system. You should answer the following questions, and identify the corresponding codes in Minix:
a. How does the OS recognize whether a file is a Set-UID?
by checking an access right flag
b. What does Minix do when a Set-UID program is executed?
it does a......
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Title: Set-Uid Lab
Approximate Word Count: 941
Approximate Pages: 4 (250 words per double-spaced page)
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Set-Uid Lab
Set-UID lab. ... with the those commands being setuid programs, that ensures that roots
are the ... OS source codes of Minix, and figure out how SET-UID is implemented ... ... -
Minix Security
... Lab Report . ... fd.c #include #include #include #include #include #include main(void) {
int fd; setuid(getuid()); /setgid(getgid());* fd=open(¡§/cs/tested.txt ... ... -
General Information
... Previous in thread: setuid stuff ... LAB DECK, PRESERVATION ROOM - DAY Technicians are
carefully removing some papers from the safe and placing them in a tray of ... ... -
General Information
... Previous in thread: setuid stuff ... LAB DECK, PRESERVATION ROOM - DAY Technicians are
carefully removing some papers from the safe and placing them in a tray of ... ...
