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[gentoo-announce] [ GLSA 201507-02 ] Tor: Denial of Service

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Gentoo Linux Security Advisory GLSA 201507-02

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https://security.gentoo.org/

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Severity: Normal

Title: Tor: Denial of Service

Date: July 06, 2015

Bugs: #545940

ID: 201507-02

 

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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

-------------------------------------------------------------------

1 net-misc/tor < 0.2.6.7 >= 0.2.6.7

 

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

==========

 

[ 1 ] CVE-2015-2928

http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-2928

[ 2 ] CVE-2015-2929

http://nvd.nist.gov/nvd.cfm?cvename=CVE-2015-2929

[ 3 ] Upstream announcement

https://blog.torproject.org/blog/tor-02512-and-0267-are-released

 

Availability

============

 

This GLSA and any updates to it are available for viewing at

the Gentoo Security Website:

 

https://security.gentoo.org/glsa/201507-02

 

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 ( -at -) gentoo.org or alternatively, you may file a bug at

https://bugs.gentoo.org.

 

License

=======

 

Copyright 2015 Gentoo Foundation, Inc; referenced text

belongs to its owner(s).

 

The contents of this document are licensed under the

Creative Commons - Attribution / Share Alike license.

 

http://creativecommons.org/licenses/by-sa/2.5

 

 

 

 

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