GLSA 200508-16: Tor: Information disclosure

http://security.gentoo.org/

Severity:	low
Title:	Tor: Information disclosure
Date:	08/25/2005
Bugs:	#102245
ID:	200508-16

Synopsis

A flaw in Tor leads to the disclosure of information and the loss of anonymity, integrity and confidentiality.

Background

Tor is an implementation of second generation Onion Routing, a connection-oriented anonymizing communication service.

Affected packages

Package	Vulnerable	Unaffected	Architecture(s)
net-misc/tor	< 0.1.0.14	>= 0.1.0.14	All supported architectures

Description

The Diffie-Hellman implementation of Tor fails to verify the cryptographic strength of keys which are used during handshakes.

Impact

By setting up a malicious Tor server and enticing users to use this server as first hop, a remote attacker could read and modify all traffic of the user.

Workaround

There is no known workaround at this time.

Resolution

All Tor users should upgrade to the latest version:

    # emerge --sync
    # emerge --ask --oneshot --verbose ">=net-misc/tor-0.1.0.14"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200508-16.xml

Concerns?

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org.