09748a3527
Fixes CVE-2017-{13078,13079,13080,13081,13082,13087,13088}.
See these announcements for more information:
https://w1.fi/security/2017-1/wpa-packet-number-reuse-with-replayed-messages.txt
https://www.krackattacks.com/
* gnu/packages/patches/wpa-supplicant-CVE-2017-13082.patch,
gnu/packages/patches/wpa-supplicant-fix-key-reuse.patch,
gnu/packages/patches/wpa-supplicant-fix-nonce-reuse.patch
gnu/packages/patches/wpa-supplicant-fix-zeroed-keys.patch,
gnu/packages/patches/wpa-supplicant-krack-followups.patch: New files.
* gnu/packages/admin.scm (wpa-supplicant-minimal)[source]: Use them.
* gnu/local.mk (dist_patch_DATA): Add them.
182 lines
6.4 KiB
Diff
182 lines
6.4 KiB
Diff
Fix CVE-2017-13082:
|
|
|
|
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-13082
|
|
https://w1.fi/security/2017-1/wpa-packet-number-reuse-with-replayed-messages.txt
|
|
|
|
Patch copied from upstream:
|
|
https://w1.fi/security/2017-1/rebased-v2.6-0001-hostapd-Avoid-key-reinstallation-in-FT-handshake.patch
|
|
|
|
From cf4cab804c7afd5c45505528a8d16e46163243a2 Mon Sep 17 00:00:00 2001
|
|
From: Mathy Vanhoef <Mathy.Vanhoef@cs.kuleuven.be>
|
|
Date: Fri, 14 Jul 2017 15:15:35 +0200
|
|
Subject: [PATCH 1/8] hostapd: Avoid key reinstallation in FT handshake
|
|
|
|
Do not reinstall TK to the driver during Reassociation Response frame
|
|
processing if the first attempt of setting the TK succeeded. This avoids
|
|
issues related to clearing the TX/RX PN that could result in reusing
|
|
same PN values for transmitted frames (e.g., due to CCM nonce reuse and
|
|
also hitting replay protection on the receiver) and accepting replayed
|
|
frames on RX side.
|
|
|
|
This issue was introduced by the commit
|
|
0e84c25434e6a1f283c7b4e62e483729085b78d2 ('FT: Fix PTK configuration in
|
|
authenticator') which allowed wpa_ft_install_ptk() to be called multiple
|
|
times with the same PTK. While the second configuration attempt is
|
|
needed with some drivers, it must be done only if the first attempt
|
|
failed.
|
|
|
|
Signed-off-by: Mathy Vanhoef <Mathy.Vanhoef@cs.kuleuven.be>
|
|
---
|
|
src/ap/ieee802_11.c | 16 +++++++++++++---
|
|
src/ap/wpa_auth.c | 11 +++++++++++
|
|
src/ap/wpa_auth.h | 3 ++-
|
|
src/ap/wpa_auth_ft.c | 10 ++++++++++
|
|
src/ap/wpa_auth_i.h | 1 +
|
|
5 files changed, 37 insertions(+), 4 deletions(-)
|
|
|
|
diff --git a/src/ap/ieee802_11.c b/src/ap/ieee802_11.c
|
|
index 4e04169..333035f 100644
|
|
--- a/src/ap/ieee802_11.c
|
|
+++ b/src/ap/ieee802_11.c
|
|
@@ -1841,6 +1841,7 @@ static int add_associated_sta(struct hostapd_data *hapd,
|
|
{
|
|
struct ieee80211_ht_capabilities ht_cap;
|
|
struct ieee80211_vht_capabilities vht_cap;
|
|
+ int set = 1;
|
|
|
|
/*
|
|
* Remove the STA entry to ensure the STA PS state gets cleared and
|
|
@@ -1848,9 +1849,18 @@ static int add_associated_sta(struct hostapd_data *hapd,
|
|
* FT-over-the-DS, where a station re-associates back to the same AP but
|
|
* skips the authentication flow, or if working with a driver that
|
|
* does not support full AP client state.
|
|
+ *
|
|
+ * Skip this if the STA has already completed FT reassociation and the
|
|
+ * TK has been configured since the TX/RX PN must not be reset to 0 for
|
|
+ * the same key.
|
|
*/
|
|
- if (!sta->added_unassoc)
|
|
+ if (!sta->added_unassoc &&
|
|
+ (!(sta->flags & WLAN_STA_AUTHORIZED) ||
|
|
+ !wpa_auth_sta_ft_tk_already_set(sta->wpa_sm))) {
|
|
hostapd_drv_sta_remove(hapd, sta->addr);
|
|
+ wpa_auth_sm_event(sta->wpa_sm, WPA_DRV_STA_REMOVED);
|
|
+ set = 0;
|
|
+ }
|
|
|
|
#ifdef CONFIG_IEEE80211N
|
|
if (sta->flags & WLAN_STA_HT)
|
|
@@ -1873,11 +1883,11 @@ static int add_associated_sta(struct hostapd_data *hapd,
|
|
sta->flags & WLAN_STA_VHT ? &vht_cap : NULL,
|
|
sta->flags | WLAN_STA_ASSOC, sta->qosinfo,
|
|
sta->vht_opmode, sta->p2p_ie ? 1 : 0,
|
|
- sta->added_unassoc)) {
|
|
+ set)) {
|
|
hostapd_logger(hapd, sta->addr,
|
|
HOSTAPD_MODULE_IEEE80211, HOSTAPD_LEVEL_NOTICE,
|
|
"Could not %s STA to kernel driver",
|
|
- sta->added_unassoc ? "set" : "add");
|
|
+ set ? "set" : "add");
|
|
|
|
if (sta->added_unassoc) {
|
|
hostapd_drv_sta_remove(hapd, sta->addr);
|
|
diff --git a/src/ap/wpa_auth.c b/src/ap/wpa_auth.c
|
|
index 3587086..707971d 100644
|
|
--- a/src/ap/wpa_auth.c
|
|
+++ b/src/ap/wpa_auth.c
|
|
@@ -1745,6 +1745,9 @@ int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event)
|
|
#else /* CONFIG_IEEE80211R */
|
|
break;
|
|
#endif /* CONFIG_IEEE80211R */
|
|
+ case WPA_DRV_STA_REMOVED:
|
|
+ sm->tk_already_set = FALSE;
|
|
+ return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_IEEE80211R
|
|
@@ -3250,6 +3253,14 @@ int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm)
|
|
}
|
|
|
|
|
|
+int wpa_auth_sta_ft_tk_already_set(struct wpa_state_machine *sm)
|
|
+{
|
|
+ if (!sm || !wpa_key_mgmt_ft(sm->wpa_key_mgmt))
|
|
+ return 0;
|
|
+ return sm->tk_already_set;
|
|
+}
|
|
+
|
|
+
|
|
int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
|
|
struct rsn_pmksa_cache_entry *entry)
|
|
{
|
|
diff --git a/src/ap/wpa_auth.h b/src/ap/wpa_auth.h
|
|
index 0de8d97..97461b0 100644
|
|
--- a/src/ap/wpa_auth.h
|
|
+++ b/src/ap/wpa_auth.h
|
|
@@ -267,7 +267,7 @@ void wpa_receive(struct wpa_authenticator *wpa_auth,
|
|
u8 *data, size_t data_len);
|
|
enum wpa_event {
|
|
WPA_AUTH, WPA_ASSOC, WPA_DISASSOC, WPA_DEAUTH, WPA_REAUTH,
|
|
- WPA_REAUTH_EAPOL, WPA_ASSOC_FT
|
|
+ WPA_REAUTH_EAPOL, WPA_ASSOC_FT, WPA_DRV_STA_REMOVED
|
|
};
|
|
void wpa_remove_ptk(struct wpa_state_machine *sm);
|
|
int wpa_auth_sm_event(struct wpa_state_machine *sm, enum wpa_event event);
|
|
@@ -280,6 +280,7 @@ int wpa_auth_pairwise_set(struct wpa_state_machine *sm);
|
|
int wpa_auth_get_pairwise(struct wpa_state_machine *sm);
|
|
int wpa_auth_sta_key_mgmt(struct wpa_state_machine *sm);
|
|
int wpa_auth_sta_wpa_version(struct wpa_state_machine *sm);
|
|
+int wpa_auth_sta_ft_tk_already_set(struct wpa_state_machine *sm);
|
|
int wpa_auth_sta_clear_pmksa(struct wpa_state_machine *sm,
|
|
struct rsn_pmksa_cache_entry *entry);
|
|
struct rsn_pmksa_cache_entry *
|
|
diff --git a/src/ap/wpa_auth_ft.c b/src/ap/wpa_auth_ft.c
|
|
index 42242a5..e63b99a 100644
|
|
--- a/src/ap/wpa_auth_ft.c
|
|
+++ b/src/ap/wpa_auth_ft.c
|
|
@@ -780,6 +780,14 @@ void wpa_ft_install_ptk(struct wpa_state_machine *sm)
|
|
return;
|
|
}
|
|
|
|
+ if (sm->tk_already_set) {
|
|
+ /* Must avoid TK reconfiguration to prevent clearing of TX/RX
|
|
+ * PN in the driver */
|
|
+ wpa_printf(MSG_DEBUG,
|
|
+ "FT: Do not re-install same PTK to the driver");
|
|
+ return;
|
|
+ }
|
|
+
|
|
/* FIX: add STA entry to kernel/driver here? The set_key will fail
|
|
* most likely without this.. At the moment, STA entry is added only
|
|
* after association has been completed. This function will be called
|
|
@@ -792,6 +800,7 @@ void wpa_ft_install_ptk(struct wpa_state_machine *sm)
|
|
|
|
/* FIX: MLME-SetProtection.Request(TA, Tx_Rx) */
|
|
sm->pairwise_set = TRUE;
|
|
+ sm->tk_already_set = TRUE;
|
|
}
|
|
|
|
|
|
@@ -898,6 +907,7 @@ static int wpa_ft_process_auth_req(struct wpa_state_machine *sm,
|
|
|
|
sm->pairwise = pairwise;
|
|
sm->PTK_valid = TRUE;
|
|
+ sm->tk_already_set = FALSE;
|
|
wpa_ft_install_ptk(sm);
|
|
|
|
buflen = 2 + sizeof(struct rsn_mdie) + 2 + sizeof(struct rsn_ftie) +
|
|
diff --git a/src/ap/wpa_auth_i.h b/src/ap/wpa_auth_i.h
|
|
index 72b7eb3..7fd8f05 100644
|
|
--- a/src/ap/wpa_auth_i.h
|
|
+++ b/src/ap/wpa_auth_i.h
|
|
@@ -65,6 +65,7 @@ struct wpa_state_machine {
|
|
struct wpa_ptk PTK;
|
|
Boolean PTK_valid;
|
|
Boolean pairwise_set;
|
|
+ Boolean tk_already_set;
|
|
int keycount;
|
|
Boolean Pair;
|
|
struct wpa_key_replay_counter {
|
|
--
|
|
2.7.4
|
|
|