Has anyone else beside me tried this anti-ptrace script? I downloaded it
from packetstormsecurity.com and ran and loaded the module and it works like
a charm. If anyone tries to use ptrace besides root it echo's that event to
the root terminal, and denies it. Well here is a copy of the script
#!/bin/sh
# MAKE ME EXECUTABLE !!!
#
# [EMAIL PROTECTED]:/home/sacrine/TEST# chmod +x anti-ptrace
# [EMAIL PROTECTED]:/home/sacrine/TEST# ./anti-ptrace
# [+] making anti-ptrace.c: OK
# [+] compiling the script: OK
# [+] loading the module : OK
#
echo -n " [+] making anti-ptrace.c: "
cat > anti-ptrace.c <<NETRIC
/*
* Noodoplossing voor de ptrace race vuln
* anti-ptrace.c by sacrine
* netric.org
*/
#define __KERNEL__
#define MODULE
#define LINUX
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/version.h>
#include <linux/slab.h>
#include <linux/sched.h>
#include <linux/fs.h>
#include <linux/ctype.h>
#include <linux/tty.h>
#include <sys/syscall.h>
#include <linux/ptrace.h>
long (*o_ptrace) ( pid_t pid,
void *addr,
void *data );
extern void* sys_call_table[];
int anti_ptrace( pid_t pid,
uid_t uid,
void *addr,
void *data )
{
uid_t o_uid;
if(current->uid == 0)
{
return(o_ptrace(pid,addr,data));
}
printk("warning: ptrace(); violation\n"
"pid=[%i] uid=[%i]\n"
,current->pid
,current->uid);
console_print("warning: non-root users are not allowed to use
ptrace();\n");
return EPERM;
}
int init_module(void)
{
o_ptrace=sys_call_table[SYS_ptrace];
sys_call_table[SYS_ptrace]=anti_ptrace;
printk("anti-ptrace kernel module loaded with pid=[%i]\n",
current->pid);
return(0);
}
void cleanup_module(void)
{
sys_call_table[SYS_ptrace]=o_ptrace;
printk("anti-ptrace kernel module ended with pid=[%i]\n",
current->pid);
}
NETRIC
echo "OK";
echo -n " [+] compiling the script: ";
gcc -c anti-ptrace.c -I/lib/modules/$(uname -r)/build/include
echo "OK";
echo -n " [+] loading the module : ";
/sbin/insmod anti-ptrace.o >/dev/null
echo "OK";
# sacrine [Netric Security]
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