kentpeacock / rpms / openssh

Forked from rpms/openssh 2 years ago
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diff -up openssh/sshd.c.ip-opts openssh/sshd.c
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--- openssh/sshd.c.ip-opts	2016-07-25 13:58:48.998507834 +0200
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+++ openssh/sshd.c	2016-07-25 14:01:28.346469878 +0200
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@@ -1507,12 +1507,29 @@ check_ip_options(struct ssh *ssh)
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 	if (getsockopt(sock_in, IPPROTO_IP, IP_OPTIONS, opts,
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 	    &option_size) >= 0 && option_size != 0) {
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-		text[0] = '\0';
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-		for (i = 0; i < option_size; i++)
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-			snprintf(text + i*3, sizeof(text) - i*3,
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-			    " %2.2x", opts[i]);
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-		fatal("Connection from %.100s port %d with IP opts: %.800s",
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-		    ssh_remote_ipaddr(ssh), ssh_remote_port(ssh), text);
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+		i = 0;
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+		do {
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+			switch (opts[i]) {
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+				case 0:
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+				case 1:
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+					++i;
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+					break;
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+				case 130:
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+				case 133:
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+				case 134:
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+					i += opts[i + 1];
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+					break;
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+				default:
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+				/* Fail, fatally, if we detect either loose or strict
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+			 	 * source routing options. */
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+					text[0] = '\0';
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+					for (i = 0; i < option_size; i++)
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+						snprintf(text + i*3, sizeof(text) - i*3,
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+							" %2.2x", opts[i]);
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+					fatal("Connection from %.100s port %d with IP options:%.800s",
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+						ssh_remote_ipaddr(ssh), ssh_remote_port(ssh), text);
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+			}
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+		} while (i < option_size);
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 	}
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 	return;
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 #endif /* IP_OPTIONS */