predictable WebSocket mask

curl's WebSocket code did not update the 32-bit mask pattern for each new outgoing frame as the specification says. Instead it used a fixed mask that persisted and was used throughout the entire connection. A predictable mask pattern allows for a malicious server to induce traffic between the two...

Drupal core - Denial of service

The way page caching was implemented allows a denial of service attack. An attacker has to have the ability to post content on the site. He or she would then be able to poison the page cache, so that it returns cached 404 page not found errors for existing pages. If the page cache is not enabled,...