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Merge branch 'bugfix/sae_h2e_vulnerability_fix' into 'master'

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fix(wifi): Sae check for invalid rejected group

See merge request espressif/esp-idf!33416
This commit is contained in:
Jiang Jiang Jian
2024-09-23 20:32:00 +08:00
parent 0690e53294 f9aa42b137
commit 4530b0e395
3 changed files with 134 additions and 1 deletions
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57
components/wpa_supplicant/esp_supplicant/src/esp_wpa3.c
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@@ -244,6 +244,60 @@ static u8 *wpa3_build_sae_msg(u8 *bssid, u32 sae_msg_type, size_t *sae_msg_len)
return buf;
}
static int wpa3_sae_is_group_enabled(int group)
{
int *groups = NULL;
int default_groups[] = { 19, 0 };
int i;
if (!groups) {
groups = default_groups;
}
for (i = 0; groups[i] > 0; i++) {
if (groups[i] == group) {
return 1;
}
}
return 0;
}
static int wpa3_check_sae_rejected_groups(const struct wpabuf *groups)
{
size_t i, count, len;
const u8 *pos;
if (!groups) {
return 0;
}
pos = wpabuf_head(groups);
len = wpabuf_len(groups);
if (len & 1) {
wpa_printf(MSG_DEBUG,
"SAE: Invalid length of the Rejected Groups element payload: %zu",
len);
return 1;
}
count = len / 2;
for (i = 0; i < count; i++) {
int enabled;
u16 group;
group = WPA_GET_LE16(pos);
pos += 2;
enabled = wpa3_sae_is_group_enabled(group);
wpa_printf(MSG_DEBUG, "SAE: Rejected group %u is %s",
group, enabled ? "enabled" : "disabled");
if (enabled) {
return 1;
}
}
return 0;
}
static int wpa3_parse_sae_commit(u8 *buf, u32 len, u16 status)
{
int ret;
@@ -281,6 +335,9 @@ static int wpa3_parse_sae_commit(u8 *buf, u32 len, u16 status)
wpa_printf(MSG_ERROR, "wpa3: could not parse commit(%d)", ret);
return ret;
}
if (g_sae_data.tmp && wpa3_check_sae_rejected_groups(g_sae_data.tmp->peer_rejected_groups)) {
return -1;
}
ret = sae_process_commit(&g_sae_data);
if (ret) {