1 files changed, 48 insertions, 0 deletions

diff --git a/meta/recipes-connectivity/wpa-supplicant/wpa-supplicant/0001-EAP-pwd-server-Fix-reassembly-buffer-handling.patch b/meta/recipes-connectivity/wpa-supplicant/wpa-supplicant/0001-EAP-pwd-server-Fix-reassembly-buffer-handling.patch
new file mode 100644
index 0000000000..45e6e87dfe
--- /dev/null
+++ b/meta/recipes-connectivity/wpa-supplicant/wpa-supplicant/0001-EAP-pwd-server-Fix-reassembly-buffer-handling.patch
@@ -0,0 +1,48 @@
+From fe76f487e28bdc61940f304f153a954cf36935ea Mon Sep 17 00:00:00 2001
+From: Jouni Malinen <jouni@codeaurora.org>
+Date: Wed, 17 Apr 2019 01:55:32 +0300
+Subject: [PATCH 1/3] EAP-pwd server: Fix reassembly buffer handling
+
+data->inbuf allocation might fail and if that were to happen, the next
+fragment in the exchange could have resulted in NULL pointer
+dereference. Unexpected fragment with more bit might also be able to
+trigger this. Fix that by explicitly checking for data->inbuf to be
+available before using it.
+
+Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
+Signed-off-by: Adrian Bunk <bunk@stusta.de>
+Upstream-Status: Backport
+CVE: CVE-2019-11555
+---
+ src/eap_server/eap_server_pwd.c | 8 +++++++-
+ 1 file changed, 7 insertions(+), 1 deletion(-)
+
+diff --git a/src/eap_server/eap_server_pwd.c b/src/eap_server/eap_server_pwd.c
+index 11bef55..38e2af8 100644
+--- a/src/eap_server/eap_server_pwd.c
++++ b/src/eap_server/eap_server_pwd.c
+@@ -912,6 +912,12 @@ static void eap_pwd_process(struct eap_sm *sm, void *priv,
+         * the first and all intermediate fragments have the M bit set
+         */
+        if (EAP_PWD_GET_MORE_BIT(lm_exch) || data->in_frag_pos) {
++               if (!data->inbuf) {
++                       wpa_printf(MSG_DEBUG,
++                                  "EAP-pwd: No buffer for reassembly");
++                       eap_pwd_state(data, FAILURE);
++                       return;
++               }
+                if ((data->in_frag_pos + len) > wpabuf_size(data->inbuf)) {
+                        wpa_printf(MSG_DEBUG, "EAP-pwd: Buffer overflow "
+                                   "attack detected! (%d+%d > %d)",
+@@ -932,7 +938,7 @@ static void eap_pwd_process(struct eap_sm *sm, void *priv,
+         * last fragment won't have the M bit set (but we're obviously
+         * buffering fragments so that's how we know it's the last)
+         */
+-       if (data->in_frag_pos) {
++       if (data->in_frag_pos && data->inbuf) {
+                pos = wpabuf_head_u8(data->inbuf);
+                len = data->in_frag_pos;
+                wpa_printf(MSG_DEBUG, "EAP-pwd: Last fragment, %d bytes",
+-- 
+2.7.4
+