China tried to upgrade the Great Firewall but may have left it vulnerable to attack

• Researchers have identified vulnerabilities in China's Great Firewall
• The firewall attempts to block QUIC connections
• Blocking attempts leave the state exposed

Upgrades to China’s Great Firewall (GFW) have not gone as planned, and the resulting ‘critical flaw’ reduces the effectiveness of the firewall in moderating traffic loads, researchers have found. Attempts by China to censor a specific type of internet traffic in the country have left the state at risk and vulnerable to attack;

‘We [..] demonstrate that this censorship mechanism can be weaponized to block UDP traffic between arbitrary hosts in China and the rest of the world. We collaborate with various open-source communities to integrate circumvention strategies into Mozilla Firefox, the quic-go library, and all major QUIC-based circumvention tools.’

The paper was written by researchers from activist group Great Firewall Report, as well as Stanford University, University of Massachusetts Amherst, and the University of ...