forked from pool/wpa_supplicant
81f0769d04
- added patch for bnc#930077 0001-AP-WMM-Fix-integer-underflow-in-WMM-Action-frame-par.patch - added patch for bnc#930078 0001-WPS-Fix-HTTP-chunked-transfer-encoding-parser.patch - added patches for bnc#930079 0001-EAP-pwd-peer-Fix-payload-length-validation-for-Commi.patch 0002-EAP-pwd-server-Fix-payload-length-validation-for-Com.patch 0003-EAP-pwd-peer-Fix-Total-Length-parsing-for-fragment-r.patch 0004-EAP-pwd-server-Fix-Total-Length-parsing-for-fragment.patch 0005-EAP-pwd-peer-Fix-asymmetric-fragmentation-behavior.patch OBS-URL: https://build.opensuse.org/request/show/305848 OBS-URL: https://build.opensuse.org/package/show/hardware/wpa_supplicant?expand=0&rev=56
51 lines
1.8 KiB
Diff
51 lines
1.8 KiB
Diff
From 3035cc2894e08319b905bd6561e8bddc8c2db9fa Mon Sep 17 00:00:00 2001
|
|
From: Jouni Malinen <j@w1.fi>
|
|
Date: Sat, 2 May 2015 19:26:06 +0300
|
|
Subject: [PATCH 4/5] EAP-pwd server: Fix Total-Length parsing for fragment
|
|
reassembly
|
|
|
|
The remaining number of bytes in the message could be smaller than the
|
|
Total-Length field size, so the length needs to be explicitly checked
|
|
prior to reading the field and decrementing the len variable. This could
|
|
have resulted in the remaining length becoming negative and interpreted
|
|
as a huge positive integer.
|
|
|
|
In addition, check that there is no already started fragment in progress
|
|
before allocating a new buffer for reassembling fragments. This avoid a
|
|
potential memory leak when processing invalid message.
|
|
|
|
Signed-off-by: Jouni Malinen <j@w1.fi>
|
|
---
|
|
src/eap_server/eap_server_pwd.c | 10 ++++++++++
|
|
1 file changed, 10 insertions(+)
|
|
|
|
diff --git a/src/eap_server/eap_server_pwd.c b/src/eap_server/eap_server_pwd.c
|
|
index 3189105..2bfc3c2 100644
|
|
--- a/src/eap_server/eap_server_pwd.c
|
|
+++ b/src/eap_server/eap_server_pwd.c
|
|
@@ -942,11 +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 "
|
|
--
|
|
1.9.1
|
|
|