You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
41 lines
1.4 KiB
Diff
41 lines
1.4 KiB
Diff
From d2d1a324ce937628e4d9d9999fe113819b7d4478 Mon Sep 17 00:00:00 2001
|
|
From: Jouni Malinen <jouni@codeaurora.org>
|
|
Date: Wed, 17 Apr 2019 02:21:20 +0300
|
|
Subject: [PATCH 3/3] EAP-pwd peer: Fix reassembly buffer handling
|
|
|
|
Unexpected fragment might result in data->inbuf not being allocated
|
|
before processing and that could have resulted in NULL pointer
|
|
dereference. Fix that by explicitly checking for data->inbuf to be
|
|
available before using it.
|
|
|
|
Signed-off-by: Jouni Malinen <jouni@codeaurora.org>
|
|
---
|
|
src/eap_peer/eap_pwd.c | 9 ++++++++-
|
|
1 file changed, 8 insertions(+), 1 deletion(-)
|
|
|
|
--- a/src/eap_peer/eap_pwd.c
|
|
+++ b/src/eap_peer/eap_pwd.c
|
|
@@ -969,6 +969,13 @@ eap_pwd_process(struct eap_sm *sm, void
|
|
* buffer and ACK the fragment
|
|
*/
|
|
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");
|
|
+ ret->methodState = METHOD_DONE;
|
|
+ ret->decision = DECISION_FAIL;
|
|
+ return NULL;
|
|
+ }
|
|
data->in_frag_pos += len;
|
|
if (data->in_frag_pos > wpabuf_size(data->inbuf)) {
|
|
wpa_printf(MSG_INFO, "EAP-pwd: Buffer overflow attack "
|
|
@@ -995,7 +1002,7 @@ eap_pwd_process(struct eap_sm *sm, void
|
|
/*
|
|
* we're buffering and this is the last fragment
|
|
*/
|
|
- if (data->in_frag_pos) {
|
|
+ if (data->in_frag_pos && data->inbuf) {
|
|
wpa_printf(MSG_DEBUG, "EAP-pwd: Last fragment, %d bytes",
|
|
(int) len);
|
|
pos = wpabuf_head_u8(data->inbuf);
|