Ubuntu 18: 2020-a2b1c3d4e5 Fix for Major Memory Leak in Firefox

The Tor network is a group of volunteer-operated servers that allows people to

improve their privacy and security on the Internet. Tor's users employ this

network by connecting through a series of virtual tunnels rather than making a

direct connection, thus allowing both organizations and individuals to share

information over public networks without compromising their privacy. Along the

same line, Tor is an effective censorship circumvention tool, allowing its

users to reach otherwise blocked destinations or content. Tor can also be used

as a building block for software developers to create new communication tools

with built-in privacy features.

This package contains the Tor software that can act as either a server on the

Tor network, or as a client to connect to the Tor network.

Security fix for integer underflow