Despite the architectural improvements over WPA2, WPA3 is not a silver bullet. Shortly after its release, researchers discovered the 'Dragonblood' suite of vulnerabilities, proving that implementation errors can undermine mathematical perfection.
Dragonblood focuses on the SAE handshake. Researchers found that the 'Hunting and Pecking' algorithm used to derive the curve point could leak information via timing attacks and cache-based side channels.
By measuring how long the AP takes to find a valid point, an attacker can deduce information about the password.
The variation in timing allows an attacker to perform a side-channel attack, effectively turning the 'immune' SAE handshake back into a dictionary attack, though it is much slower than WPA2's offline version.
As discussed in the Transition Mode lesson, the ability to force a client into WPA2 mode is the most practical attack against WPA3 deployments.
# Conceptual Attack Sequence
# 1. Send Deauth to Target Client
# 2. Advertise 'Legacy-WiFi' as WPA2-Only
# 3. Client connects via WPA2
# 4. Capture 4-way handshake
# 5. hashcat -m 2500 capture.hccapx wordlist.txt| Attack | Target | Vulnerability | Outcome |
|---|---|---|---|
| Timing Attack | SAE Algorithm | Non-constant time execution | Password Leakage |
| Cache Attack | CPU Cache | Deterministic memory access | Password Leakage |
| Downgrade | Transition Mode | WPA2 Fallback | Full Handshake Capture |
| Sae-Symmetric | SAE State | Poor Randomness | Session Hijacking |
The fix for Dragonblood involved moving from 'Hunting and Pecking' to a 'Hash-to-Curve' algorithm, which ensures constant-time execution regardless of the password.
Firmware updates are the ONLY way to stop Dragonblood attacks; changing the password does not fix the algorithmic leak.
Verify exercises to earn ★ 230 XP and unlock next lab level.