83 lines
2.7 KiB
Diff
83 lines
2.7 KiB
Diff
From ecbb0b3dc122b0d290987cf9c84010bbe53e1022 Mon Sep 17 00:00:00 2001
|
|
From: Jouni Malinen <jouni@qca.qualcomm.com>
|
|
Date: Fri, 4 Mar 2016 17:20:18 +0200
|
|
Subject: [PATCH 1/5] WPS: Reject a Credential with invalid passphrase
|
|
|
|
WPA/WPA2-Personal passphrase is not allowed to include control
|
|
characters. Reject a Credential received from a WPS Registrar both as
|
|
STA (Credential) and AP (AP Settings) if the credential is for WPAPSK or
|
|
WPA2PSK authentication type and includes an invalid passphrase.
|
|
|
|
This fixes an issue where hostapd or wpa_supplicant could have updated
|
|
the configuration file PSK/passphrase parameter with arbitrary data from
|
|
an external device (Registrar) that may not be fully trusted. Should
|
|
such data include a newline character, the resulting configuration file
|
|
could become invalid and fail to be parsed.
|
|
|
|
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
|
|
---
|
|
src/utils/common.c | 12 ++++++++++++
|
|
src/utils/common.h | 1 +
|
|
src/wps/wps_attr_process.c | 10 ++++++++++
|
|
3 files changed, 23 insertions(+)
|
|
|
|
diff --git a/src/utils/common.c b/src/utils/common.c
|
|
index 450e2c6..27b7c02 100644
|
|
--- a/src/utils/common.c
|
|
+++ b/src/utils/common.c
|
|
@@ -697,6 +697,18 @@ int is_hex(const u8 *data, size_t len)
|
|
}
|
|
|
|
|
|
+int has_ctrl_char(const u8 *data, size_t len)
|
|
+{
|
|
+ size_t i;
|
|
+
|
|
+ for (i = 0; i < len; i++) {
|
|
+ if (data[i] < 32 || data[i] == 127)
|
|
+ return 1;
|
|
+ }
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+
|
|
size_t merge_byte_arrays(u8 *res, size_t res_len,
|
|
const u8 *src1, size_t src1_len,
|
|
const u8 *src2, size_t src2_len)
|
|
diff --git a/src/utils/common.h b/src/utils/common.h
|
|
index 701dbb2..a972240 100644
|
|
--- a/src/utils/common.h
|
|
+++ b/src/utils/common.h
|
|
@@ -488,6 +488,7 @@ const char * wpa_ssid_txt(const u8 *ssid, size_t ssid_len);
|
|
|
|
char * wpa_config_parse_string(const char *value, size_t *len);
|
|
int is_hex(const u8 *data, size_t len);
|
|
+int has_ctrl_char(const u8 *data, size_t len);
|
|
size_t merge_byte_arrays(u8 *res, size_t res_len,
|
|
const u8 *src1, size_t src1_len,
|
|
const u8 *src2, size_t src2_len);
|
|
diff --git a/src/wps/wps_attr_process.c b/src/wps/wps_attr_process.c
|
|
index eadb22f..e8c4579 100644
|
|
--- a/src/wps/wps_attr_process.c
|
|
+++ b/src/wps/wps_attr_process.c
|
|
@@ -229,6 +229,16 @@ static int wps_workaround_cred_key(struct wps_credential *cred)
|
|
cred->key_len--;
|
|
#endif /* CONFIG_WPS_STRICT */
|
|
}
|
|
+
|
|
+
|
|
+ if (cred->auth_type & (WPS_AUTH_WPAPSK | WPS_AUTH_WPA2PSK) &&
|
|
+ (cred->key_len < 8 || has_ctrl_char(cred->key, cred->key_len))) {
|
|
+ wpa_printf(MSG_INFO, "WPS: Reject credential with invalid WPA/WPA2-Personal passphrase");
|
|
+ wpa_hexdump_ascii_key(MSG_INFO, "WPS: Network Key",
|
|
+ cred->key, cred->key_len);
|
|
+ return -1;
|
|
+ }
|
|
+
|
|
return 0;
|
|
}
|
|
|
|
--
|
|
1.9.1
|
|
|