Fedora 27: 2017-12-17 Moderate: Tor Remote DoS Security Update

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.

update to upstream release 0.3.1.9. Fixes various CVEs: CVE-2017-8819: Replay-cache ineffective for v2 onion services CVE-2017-8820: Remote DoS attack against

directory authorities CVE-2017-8821: An attacker can make Tor ask for a password

CVE-2017-8822: Relays can pick themselves in a circuit path CVE-2017-8823: Use-after-free in onion service v2

su -c 'dnf upgrade tor' at the command line.

For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

All packages are signed with the Fedora Project GPG key. More details on the

GPG keys used by the Fedora Project can be found at

https://fedoraproject.org/security/

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