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40 lines
1.2 KiB
40 lines
1.2 KiB
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 */
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