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Jakub Jelen |
5878eb |
diff -up openssh/sshd.c.ip-opts openssh/sshd.c
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Dmitry Belyavskiy |
089d79 |
--- openssh/sshd-session.c.ip-opts 2016-07-25 13:58:48.998507834 +0200
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Dmitry Belyavskiy |
089d79 |
+++ openssh/sshd-session.c 2016-07-25 14:01:28.346469878 +0200
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Dmitry Belyavskiy |
f79c12 |
@@ -1507,12 +1507,32 @@ check_ip_options(struct ssh *ssh)
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Jakub Jelen |
5878eb |
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Jakub Jelen |
5878eb |
if (getsockopt(sock_in, IPPROTO_IP, IP_OPTIONS, opts,
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Jan F. Chadima |
49d0cf |
&option_size) >= 0 && option_size != 0) {
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Jan F. Chadima |
49d0cf |
- text[0] = '\0';
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Jan F. Chadima |
49d0cf |
- for (i = 0; i < option_size; i++)
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Jan F. Chadima |
49d0cf |
- snprintf(text + i*3, sizeof(text) - i*3,
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Jakub Jelen |
5878eb |
- " %2.2x", opts[i]);
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Jakub Jelen |
5878eb |
- fatal("Connection from %.100s port %d with IP opts: %.800s",
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Jakub Jelen |
5878eb |
- ssh_remote_ipaddr(ssh), ssh_remote_port(ssh), text);
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Jan F. Chadima |
49d0cf |
+ i = 0;
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Jan F. Chadima |
49d0cf |
+ do {
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Jakub Jelen |
5878eb |
+ switch (opts[i]) {
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Jan F. Chadima |
49d0cf |
+ case 0:
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Jan F. Chadima |
49d0cf |
+ case 1:
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Jan F. Chadima |
49d0cf |
+ ++i;
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Jan F. Chadima |
49d0cf |
+ break;
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Petr Lautrbach |
94c6f8 |
+ case 130:
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Petr Lautrbach |
94c6f8 |
+ case 133:
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Petr Lautrbach |
94c6f8 |
+ case 134:
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Dmitry Belyavskiy |
f79c12 |
+ if (i + 1 < option_size && opts[i + 1] >= 2) {
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Dmitry Belyavskiy |
f79c12 |
+ i += opts[i + 1];
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Dmitry Belyavskiy |
f79c12 |
+ break;
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Dmitry Belyavskiy |
f79c12 |
+ }
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Dmitry Belyavskiy |
f79c12 |
+ /* FALLTHROUGH */
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Petr Lautrbach |
94c6f8 |
+ default:
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Jan F. Chadima |
49d0cf |
+ /* Fail, fatally, if we detect either loose or strict
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Dmitry Belyavskiy |
f79c12 |
+ * or incorrect source routing options. */
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Jan F. Chadima |
49d0cf |
+ text[0] = '\0';
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Jan F. Chadima |
49d0cf |
+ for (i = 0; i < option_size; i++)
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Jan F. Chadima |
49d0cf |
+ snprintf(text + i*3, sizeof(text) - i*3,
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Jakub Jelen |
5878eb |
+ " %2.2x", opts[i]);
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Jakub Jelen |
5878eb |
+ fatal("Connection from %.100s port %d with IP options:%.800s",
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Jakub Jelen |
5878eb |
+ ssh_remote_ipaddr(ssh), ssh_remote_port(ssh), text);
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Jan F. Chadima |
49d0cf |
+ }
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Jan F. Chadima |
49d0cf |
+ } while (i < option_size);
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Jan F. Chadima |
49d0cf |
}
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Jakub Jelen |
5878eb |
return;
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Jan F. Chadima |
49d0cf |
#endif /* IP_OPTIONS */
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