GLSA 201507-02: Tor: Denial of Service

http://security.gentoo.org/

Severity:	normal
Title:	Tor: Denial of Service
Date:	07/06/2015
Bugs:	#545940
ID:	201507-02

Synopsis

Two vulnerabilities have been found in Tor, the worst of which can allow remote attackers to cause a Denial of Service condition.

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	< 0.2.6.7	>= 0.2.6.7	All supported architectures

Description

Tor does not handle data correctly when specifically crafted data is sent, and also fails to properly verify a descriptor provided by a hidden service directory.

Impact

A remote attacker could cause a Denial of Service condition in both a Tor client or a Tor server.

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-0.2.6.7"

References

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201507-02.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.