hostapd: merge fixes for WPA packet number reuse with replayed messages and key reinstallation

Fixes:
- CERT case ID: VU#228519
- CVE-2017-13077
- CVE-2017-13078
- CVE-2017-13079
- CVE-2017-13080
- CVE-2017-13081
- CVE-2017-13082
- CVE-2017-13086
- CVE-2017-13087
- CVE-2017-13088

For more information see:
https://w1.fi/security/2017-1/wpa-packet-number-reuse-with-replayed-messages.txt

Backport of bbda81ce3077dfade2a43a39f772cfec2e82a9a5

Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 68 insertions, 0 deletions

diff --git a/package/network/services/hostapd/patches/012-FT-Do-not-allow-multiple-Reassociation-Response-fram.patch b/package/network/services/hostapd/patches/012-FT-Do-not-allow-multiple-Reassociation-Response-fram.patch
new file mode 100644
index 0000000000..12904faf1f
--- /dev/null
+++ b/package/network/services/hostapd/patches/012-FT-Do-not-allow-multiple-Reassociation-Response-fram.patch
@@ -0,0 +1,68 @@
+From: Jouni Malinen <j@w1.fi>
+Date: Fri, 22 Sep 2017 12:06:37 +0300
+Subject: [PATCH] FT: Do not allow multiple Reassociation Response frames
+
+The driver is expected to not report a second association event without
+the station having explicitly request a new association. As such, this
+case should not be reachable. However, since reconfiguring the same
+pairwise or group keys to the driver could result in nonce reuse issues,
+be extra careful here and do an additional state check to avoid this
+even if the local driver ends up somehow accepting an unexpected
+Reassociation Response frame.
+
+Signed-off-by: Jouni Malinen <j@w1.fi>
+---
+
+--- a/src/rsn_supp/wpa.c
++++ b/src/rsn_supp/wpa.c
+@@ -2568,6 +2568,9 @@ void wpa_sm_notify_assoc(struct wpa_sm *
+ #ifdef CONFIG_TDLS
+ 	wpa_tdls_assoc(sm);
+ #endif /* CONFIG_TDLS */
++#ifdef CONFIG_IEEE80211R
++	sm->ft_reassoc_completed = 0;
++#endif /* CONFIG_IEEE80211R */
+ 
+ #ifdef CONFIG_P2P
+ 	os_memset(sm->p2p_ip_addr, 0, sizeof(sm->p2p_ip_addr));
+--- a/src/rsn_supp/wpa_ft.c
++++ b/src/rsn_supp/wpa_ft.c
+@@ -153,6 +153,7 @@ static u8 * wpa_ft_gen_req_ies(struct wp
+ 	u16 capab;
+ 
+ 	sm->ft_completed = 0;
++	sm->ft_reassoc_completed = 0;
+ 
+ 	buf_len = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
+ 		2 + sm->r0kh_id_len + ric_ies_len + 100;
+@@ -681,6 +682,11 @@ int wpa_ft_validate_reassoc_resp(struct
+ 		return -1;
+ 	}
+ 
++	if (sm->ft_reassoc_completed) {
++		wpa_printf(MSG_DEBUG, "FT: Reassociation has already been completed for this FT protocol instance - ignore unexpected retransmission");
++		return 0;
++	}
++
+ 	if (wpa_ft_parse_ies(ies, ies_len, &parse) < 0) {
+ 		wpa_printf(MSG_DEBUG, "FT: Failed to parse IEs");
+ 		return -1;
+@@ -781,6 +787,8 @@ int wpa_ft_validate_reassoc_resp(struct
+ 		return -1;
+ 	}
+ 
++	sm->ft_reassoc_completed = 1;
++
+ 	if (wpa_ft_process_gtk_subelem(sm, parse.gtk, parse.gtk_len) < 0)
+ 		return -1;
+ 
+--- a/src/rsn_supp/wpa_i.h
++++ b/src/rsn_supp/wpa_i.h
+@@ -128,6 +128,7 @@ struct wpa_sm {
+ 	size_t r0kh_id_len;
+ 	u8 r1kh_id[FT_R1KH_ID_LEN];
+ 	int ft_completed;
++	int ft_reassoc_completed;
+ 	int over_the_ds_in_progress;
+ 	u8 target_ap[ETH_ALEN]; /* over-the-DS target AP */
+ 	int set_ptk_after_assoc;