wpa-supplicant: Fix CVE-2015-4141, CVE-2015-4143, CVE-2015-4144, CVE-2015-4145, CVE-2015-4146

wpa-supplicant: backport patch to fix CVE-2015-4141,
 CVE-2015-4143, CVE-2015-4144, CVE-2015-4145, CVE-2015-4146

Backport patch to fix CVE-2015-4141, CVE-2015-4143, CVE-2015-4144, CVE-2015-4145, CVE-2015-4146.
This patch is originally from:

For CVE-2015-4141:
http://w1.fi/security/2015-2/0001-WPS-Fix-HTTP-chunked-transfer-encoding-parser.patch

For CVE-2015-4143:
http://w1.fi/security/2015-4/0001-EAP-pwd-peer-Fix-payload-length-validation-for-Commi.patch
http://w1.fi/security/2015-4/0002-EAP-pwd-server-Fix-payload-length-validation-for-Com.patch

For CVE-2015-4144 and CVE-2015-4145:
http://w1.fi/security/2015-4/0003-EAP-pwd-peer-Fix-Total-Length-parsing-for-fragment-r.patch
http://w1.fi/security/2015-4/0004-EAP-pwd-server-Fix-Total-Length-parsing-for-fragment.patch

For CVE-2015-4146:
http://w1.fi/security/2015-4/0005-EAP-pwd-peer-Fix-asymmetric-fragmentation-behavior.patch

Signed-off-by: Fan Xin <fan.xin at jp.fujitsu.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 53 insertions, 0 deletions

diff --git a/meta/recipes-connectivity/wpa-supplicant/wpa-supplicant/0001-WPS-Fix-HTTP-chunked-transfer-encoding-parser.patch b/meta/recipes-connectivity/wpa-supplicant/wpa-supplicant/0001-WPS-Fix-HTTP-chunked-transfer-encoding-parser.patch
new file mode 100644
index 0000000000..2568ea1124
--- /dev/null
+++ b/meta/recipes-connectivity/wpa-supplicant/wpa-supplicant/0001-WPS-Fix-HTTP-chunked-transfer-encoding-parser.patch
@@ -0,0 +1,53 @@
+Upstream-Status: Backport
+
+Signed-off-by: Fan Xin <fan.xin@jp.fujitsu.com>
+
+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>
+---
+ src/wps/httpread.c | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+diff --git a/src/wps/httpread.c b/src/wps/httpread.c
+index 2f08f37..d2855e3 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
+ 					 */
+-- 
+1.9.1
+