Tor: Denial of Service — GLSA 201507-02

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

Affected Packages

net-misc/tor on all architectures
Affected versions < 0.2.6.7
Unaffected versions >= 0.2.6.7

Background

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

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

Release Date
July 06, 2015

Latest Revision
July 06, 2015: 1

Severity
normal

Exploitable
remote

Bugzilla entries