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hostapd: Expose the tdls_prohibit option to UCI

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wpa_disable_eapol_key_retries can't prevent attacks against the
Tunneled Direct-Link Setup (TDLS) handshake. Jouni Malinen suggested
that the existing hostapd option tdls_prohibit can be used to further
complicate this possibility at the AP side. tdls_prohibit=1 makes
hostapd advertise that use of TDLS is not allowed in the BSS.

Note: If an attacker manages to lure both TDLS peers into a fake
AP, hiding the tdls_prohibit advertisement from them, it might be
possible to bypass this protection.

Make this option configurable via UCI, but disabled by default.

Signed-off-by: Timo Sigurdsson <public_timo.s@silentcreek.de>
This commit is contained in:
Timo Sigurdsson 2017-11-14 21:41:29 +01:00 committed by Stijn Tintel
parent f997478655
commit 6515887ed9
1 changed files with 6 additions and 1 deletions
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7
package/network/services/hostapd/files/hostapd.sh
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@ -151,6 +151,8 @@ hostapd_common_add_bss_config() {
wpa_group_rekey wpa_pair_rekey wpa_master_rekey
config_add_boolean wpa_disable_eapol_key_retries
config_add_boolean tdls_prohibit
config_add_boolean rsn_preauth auth_cache
config_add_int ieee80211w
config_add_int eapol_version
@ -215,7 +217,7 @@ hostapd_set_bss_options() {
json_get_vars \
wep_rekey wpa_group_rekey wpa_pair_rekey wpa_master_rekey \
wpa_disable_eapol_key_retries \
wpa_disable_eapol_key_retries tdls_prohibit \
maxassoc max_inactivity disassoc_low_ack isolate auth_cache \
wps_pushbutton wps_label ext_registrar wps_pbc_in_m1 wps_ap_setup_locked \
wps_independent wps_device_type wps_device_name wps_manufacturer wps_pin \
@ -232,6 +234,7 @@ hostapd_set_bss_options() {
set_default wmm 1
set_default uapsd 1
set_default wpa_disable_eapol_key_retries 0
set_default tdls_prohibit 0
set_default eapol_version 0
set_default acct_port 1813
@ -252,6 +255,8 @@ hostapd_set_bss_options() {
append bss_conf "ignore_broadcast_ssid=$hidden" "$N"
append bss_conf "uapsd_advertisement_enabled=$uapsd" "$N"
[ "$tdls_prohibit" -gt 0 ] && append bss_conf "tdls_prohibit=$tdls_prohibit" "$N"
[ "$wpa" -gt 0 ] && {
[ -n "$wpa_group_rekey" ] && append bss_conf "wpa_group_rekey=$wpa_group_rekey" "$N"
[ -n "$wpa_pair_rekey" ] && append bss_conf "wpa_ptk_rekey=$wpa_pair_rekey" "$N"