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Set ss_family when generating random decoys. Fixes #2757.

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dmiller
2025-06-17 21:50:10 +00:00
parent 75f3f97763
commit a600528532
2 changed files with 8 additions and 2 deletions
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3
CHANGELOG
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@@ -1,5 +1,8 @@
#Nmap Changelog ($Id$); -*-text-*-
o [GH#2757] Fix a crash in traceroute when using randomly-generated decoys:
"Assertion `source->ss_family == AF_INET' failed" [Daniel Miller]
o [GH#2899] When IP protocol scanning on IPv6 (-sO -6), skip protocol numbers
that are registered as Extension Header values. When the --data option was
used, these would fail the assertion "len == (u32) ntohs(ip6->ip6_plen)"

7
nmap.cc
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@@ -1780,9 +1780,12 @@ void apply_delayed_options() {
fatal("You are only allowed %d decoys (if you need more redefine MAX_DECOYS in nmap.h)", MAX_DECOYS);
while (i--) {
sockaddr_storage *ss = &o.decoys[o.numdecoys];
memset(ss, 0, sizeof(sockaddr_storage));
ss->ss_family = AF_INET;
do {
((struct sockaddr_in *)&o.decoys[o.numdecoys])->sin_addr.s_addr = get_random_u32();
} while (ip_is_reserved(&o.decoys[o.numdecoys]));
((struct sockaddr_in *)ss)->sin_addr.s_addr = get_random_u32();
} while (ip_is_reserved(ss));
o.numdecoys++;
}
} else {