Tor is a network of virtual tunnels that allows people and groups to improve their privacy and security on the Internet. It also enables software developers to create new communication tools with built-in privacy features. It provides the foundation for a range of applications that allow organizations and individuals to share information over public networks without compromising their privacy. Individuals can use it to keep remote Websites from tracking them and their family members. They can also use it to connect to resources such as news sites or instant messaging services that are blocked by their local Internet service providers (ISPs).
Changes: This release fixes a critical heap overflow security issue in Tor’s buffers code. Absolutely everybody should upgrade. The bug relied on an incorrect calculation when making data continuous in one of the IO buffers, if the first chunk of the buffer was misaligned by just the wrong amount. The miscalculation would allow an attacker to overflow a piece of heap-allocated memory. Various other fixes and enhancements are included in this release.