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[v1.1-cherrypick] ESP32: Drop Invalid RA packets (#33060) #33102

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merged 1 commit into from
Apr 23, 2024
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[v1.1-cherrypick] ESP32: Drop Invalid RA packets (#33060) #33102

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5 changes: 5 additions & 0 deletions src/platform/ESP32/route_hook/ESP32RouteHook.c
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Original file line number Diff line number Diff line change
Expand Up @@ -65,6 +65,11 @@ static void ra_recv_handler(struct netif * netif, const uint8_t * icmp_payload,
{
uint8_t opt_type = icmp_payload[0];
uint8_t opt_len = (uint8_t)(icmp_payload[1] << 3);
if (opt_len == 0 || opt_len > payload_len)
{
ESP_LOGE(TAG, "Invalid ND6 option length");
break;
}

if (opt_type == ND6_OPTION_TYPE_ROUTE_INFO && opt_len >= sizeof(route_option_t) - sizeof(ip6_addr_p_t) &&
!is_self_address(netif, src_addr) && payload_len >= opt_len)
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