hostapd: bump to version 2.5

From 5acd23f4581da58683f3cf5e36cb71bbe4070bd7 Mon Sep 17 00:00:00 2001

From: Jouni Malinen <j@w1.fi>

Date: Tue, 28 Apr 2015 17:08:33 +0300

Subject: [PATCH] WPS: Fix HTTP chunked transfer encoding parser

strtoul() return value may end up overflowing the int h->chunk_size and

resulting in a negative value to be stored as the chunk_size. This could

result in the following memcpy operation using a very large length

argument which would result in a buffer overflow and segmentation fault.

This could have been used to cause a denial service by any device that

has been authorized for network access (either wireless or wired). This

would affect both the WPS UPnP functionality in a WPS AP (hostapd with

upnp_iface parameter set in the configuration) and WPS ER

(wpa_supplicant with WPS_ER_START control interface command used).

Validate the parsed chunk length value to avoid this. In addition to

rejecting negative values, we can also reject chunk size that would be

larger than the maximum configured body length.

Thanks to Kostya Kortchinsky of Google security team for discovering and

reporting this issue.

Signed-off-by: Jouni Malinen <j@w1.fi>

Signed-off-by: Baruch Siach <baruch@tkos.co.il>

---

 src/wps/httpread.c | 7 +++++++

 1 file changed, 7 insertions(+)

diff --git a/src/wps/httpread.c b/src/wps/httpread.c

index 2f08f37275c0..d2855e32fd0f 100644

--- a/src/wps/httpread.c

+++ b/src/wps/httpread.c

@@ -533,6 +533,13 @@ static void httpread_read_handler(int sd, void *eloop_ctx, void *sock_ctx)

 					if (!isxdigit(*cbp))

 						goto bad;

 					h->chunk_size = strtoul(cbp, NULL, 16);

+					if (h->chunk_size < 0 ||

+					    h->chunk_size > h->max_bytes) {

+						wpa_printf(MSG_DEBUG,

+							   "httpread: Invalid chunk size %d",

+							   h->chunk_size);

+						goto bad;

+					}

 					/* throw away chunk header

 					 * so we have only real data

 					 */

-- 

2.1.4

From ef566a4d4f74022e1fdb0a2addfe81e6de9f4aae Mon Sep 17 00:00:00 2001

From: Jouni Malinen <j@w1.fi>

Date: Wed, 29 Apr 2015 02:21:53 +0300

Subject: [PATCH] AP WMM: Fix integer underflow in WMM Action frame parser

The length of the WMM Action frame was not properly validated and the

length of the information elements (int left) could end up being

negative. This would result in reading significantly past the stack

buffer while parsing the IEs in ieee802_11_parse_elems() and while doing

so, resulting in segmentation fault.

This can result in an invalid frame being used for a denial of service

attack (hostapd process killed) against an AP with a driver that uses

hostapd for management frame processing (e.g., all mac80211-based

drivers).

Thanks to Kostya Kortchinsky of Google security team for discovering and

reporting this issue.

Signed-off-by: Jouni Malinen <j@w1.fi>

Signed-off-by: Baruch Siach <baruch@tkos.co.il>

---

 src/ap/wmm.c | 3 +++

 1 file changed, 3 insertions(+)

diff --git a/src/ap/wmm.c b/src/ap/wmm.c

index 6d4177c2a847..314e244bc956 100644

--- a/src/ap/wmm.c

+++ b/src/ap/wmm.c

@@ -274,6 +274,9 @@ void hostapd_wmm_action(struct hostapd_data *hapd,

 		return;

 	}

+	if (left < 0)

+		return; /* not a valid WMM Action frame */

+

 	/* extract the tspec info element */

 	if (ieee802_11_parse_elems(pos, left, &elems, 1) == ParseFailed) {

 		hostapd_logger(hapd, mgmt->sa, HOSTAPD_MODULE_IEEE80211,

-- 

2.1.4

This patch combines the following upstream security fixes:

28a069a545b0 EAP-pwd peer: Fix asymmetric fragmentation behavior

3035cc2894e0 EAP-pwd server: Fix Total-Length parsing for fragment reassembly

477c74395acd EAP-pwd peer: Fix Total-Length parsing for fragment reassembly

e28a58be2618 EAP-pwd server: Fix payload length validation for Commit and Confirm

dd2f043c9c43 EAP-pwd peer: Fix payload length validation for Commit and Confirm

Details at 

http://w1.fi/security/2015-4/eap-pwd-missing-payload-length-validation.txt

Signed-off-by: Baruch Siach <baruch@tkos.co.il>

---

diff --git a/src/eap_peer/eap_pwd.c b/src/eap_peer/eap_pwd.c

index f2b092669a42..e58b13a42f73 100644

--- a/src/eap_peer/eap_pwd.c

+++ b/src/eap_peer/eap_pwd.c

@@ -355,6 +355,23 @@ eap_pwd_perform_commit_exchange(struct eap_sm *sm, struct eap_pwd_data *data,

 	BIGNUM *mask = NULL, *x = NULL, *y = NULL, *cofactor = NULL;

 	u16 offset;

 	u8 *ptr, *scalar = NULL, *element = NULL;

+	size_t prime_len, order_len;

+

+	if (data->state != PWD_Commit_Req) {

+		ret->ignore = TRUE;

+		goto fin;

+	}

+

+	prime_len = BN_num_bytes(data->grp->prime);

+	order_len = BN_num_bytes(data->grp->order);

+

+	if (payload_len != 2 * prime_len + order_len) {

+		wpa_printf(MSG_INFO,

+			   "EAP-pwd: Unexpected Commit payload length %u (expected %u)",

+			   (unsigned int) payload_len,

+			   (unsigned int) (2 * prime_len + order_len));

+		goto fin;

+	}

 	if (((data->private_value = BN_new()) == NULL) ||

 	    ((data->my_element = EC_POINT_new(data->grp->group)) == NULL) ||

@@ -554,6 +571,18 @@ eap_pwd_perform_confirm_exchange(struct eap_sm *sm, struct eap_pwd_data *data,

 	u8 conf[SHA256_MAC_LEN], *cruft = NULL, *ptr;

 	int offset;

+	if (data->state != PWD_Confirm_Req) {

+		ret->ignore = TRUE;

+		goto fin;

+	}

+

+	if (payload_len != SHA256_MAC_LEN) {

+		wpa_printf(MSG_INFO,

+			   "EAP-pwd: Unexpected Confirm payload length %u (expected %u)",

+			   (unsigned int) payload_len, SHA256_MAC_LEN);

+		goto fin;

+	}

+

 	/*

 	 * first build up the ciphersuite which is group | random_function |

 	 *	prf

@@ -837,11 +866,23 @@ eap_pwd_process(struct eap_sm *sm, void *priv, struct eap_method_ret *ret,

 	 * if it's the first fragment there'll be a length field

 	 */

 	if (EAP_PWD_GET_LENGTH_BIT(lm_exch)) {

+		if (len < 2) {

+			wpa_printf(MSG_DEBUG,

+				   "EAP-pwd: Frame too short to contain Total-Length field");

+			ret->ignore = TRUE;

+			return NULL;

+		}

 		tot_len = WPA_GET_BE16(pos);

 		wpa_printf(MSG_DEBUG, "EAP-pwd: Incoming fragments whose "

 			   "total length = %d", tot_len);

 		if (tot_len > 15000)

 			return NULL;

+		if (data->inbuf) {

+			wpa_printf(MSG_DEBUG,

+				   "EAP-pwd: Unexpected new fragment start when previous fragment is still in use");

+			ret->ignore = TRUE;

+			return NULL;

+		}

 		data->inbuf = wpabuf_alloc(tot_len);

 		if (data->inbuf == NULL) {

 			wpa_printf(MSG_INFO, "Out of memory to buffer "

@@ -927,6 +968,7 @@ eap_pwd_process(struct eap_sm *sm, void *priv, struct eap_method_ret *ret,

 	/*

 	 * we have output! Do we need to fragment it?

 	 */

+	lm_exch = EAP_PWD_GET_EXCHANGE(lm_exch);

 	len = wpabuf_len(data->outbuf);

 	if ((len + EAP_PWD_HDR_SIZE) > data->mtu) {

 		resp = eap_msg_alloc(EAP_VENDOR_IETF, EAP_TYPE_PWD, data->mtu,

diff --git a/src/eap_server/eap_server_pwd.c b/src/eap_server/eap_server_pwd.c

index 66bd5d2e9179..2bfc3c27647d 100644

--- a/src/eap_server/eap_server_pwd.c

+++ b/src/eap_server/eap_server_pwd.c

@@ -656,9 +656,21 @@ eap_pwd_process_commit_resp(struct eap_sm *sm, struct eap_pwd_data *data,

 	BIGNUM *x = NULL, *y = NULL, *cofactor = NULL;

 	EC_POINT *K = NULL, *point = NULL;

 	int res = 0;

+	size_t prime_len, order_len;

 	wpa_printf(MSG_DEBUG, "EAP-pwd: Received commit response");

+	prime_len = BN_num_bytes(data->grp->prime);

+	order_len = BN_num_bytes(data->grp->order);

+

+	if (payload_len != 2 * prime_len + order_len) {

+		wpa_printf(MSG_INFO,

+			   "EAP-pwd: Unexpected Commit payload length %u (expected %u)",

+			   (unsigned int) payload_len,

+			   (unsigned int) (2 * prime_len + order_len));

+		goto fin;

+	}

+

 	if (((data->peer_scalar = BN_new()) == NULL) ||

 	    ((data->k = BN_new()) == NULL) ||

 	    ((cofactor = BN_new()) == NULL) ||

@@ -774,6 +786,13 @@ eap_pwd_process_confirm_resp(struct eap_sm *sm, struct eap_pwd_data *data,

 	u8 conf[SHA256_MAC_LEN], *cruft = NULL, *ptr;

 	int offset;

+	if (payload_len != SHA256_MAC_LEN) {

+		wpa_printf(MSG_INFO,

+			   "EAP-pwd: Unexpected Confirm payload length %u (expected %u)",

+			   (unsigned int) payload_len, SHA256_MAC_LEN);

+		goto fin;

+	}

+

 	/* build up the ciphersuite: group | random_function | prf */

 	grp = htons(data->group_num);

 	ptr = (u8 *) &cs;

@@ -923,11 +942,21 @@ static void eap_pwd_process(struct eap_sm *sm, void *priv,

 	 * the first fragment has a total length

 	 */

 	if (EAP_PWD_GET_LENGTH_BIT(lm_exch)) {

+		if (len < 2) {

+			wpa_printf(MSG_DEBUG,

+				   "EAP-pwd: Frame too short to contain Total-Length field");

+			return;

+		}

 		tot_len = WPA_GET_BE16(pos);

 		wpa_printf(MSG_DEBUG, "EAP-pwd: Incoming fragments, total "

 			   "length = %d", tot_len);

 		if (tot_len > 15000)

 			return;

+		if (data->inbuf) {

+			wpa_printf(MSG_DEBUG,

+				   "EAP-pwd: Unexpected new fragment start when previous fragment is still in use");

+			return;

+		}

 		data->inbuf = wpabuf_alloc(tot_len);

 		if (data->inbuf == NULL) {

 			wpa_printf(MSG_INFO, "EAP-pwd: Out of memory to "

# Locally calculated

sha256	6fe0eb6bd1c9cbd24952ece8586b6f7bd14ab358edfda99794e79b9b9dbd657f  hostapd-2.4.tar.gz

sha256	8e272d954dc0d7026c264b79b15389ec2b2c555b32970de39f506b9f463ec74a  hostapd-2.5.tar.gz

#

################################################################################

HOSTAPD_VERSION = 2.4

HOSTAPD_VERSION = 2.5

HOSTAPD_SITE = http://hostap.epitest.fi/releases

HOSTAPD_SUBDIR = hostapd

HOSTAPD_CONFIG = $(HOSTAPD_DIR)/$(HOSTAPD_SUBDIR)/.config