[gentoo-announce] [ GLSA 200904-11 ] Tor: Multiple vulnerabilities

[news 28]

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Gentoo Linux Security Advisory GLSA 200904-11

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http://security.gentoo.org/

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Severity: High

Title: Tor: Multiple vulnerabilities

Date: April 08, 2009

Bugs: #250018, #256078, #258833

ID: 200904-11

 

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Synopsis

========

 

Multiple vulnerabilities in Tor might allow for heap corruption, Denial

of Service, escalation of privileges and information disclosure.

 

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 < 0.2.0.34 >= 0.2.0.34

 

Description

===========

 

* Theo de Raadt reported that the application does not properly drop

privileges to the primary groups of the user specified via the "User"

configuration option (CVE-2008-5397).

 

* rovv reported that the "ClientDNSRejectInternalAddresses"

configuration option is not always enforced (CVE-2008-5398).

 

* Ilja van Sprundel reported a heap-corruption vulnerability that

might be remotely triggerable on some platforms (CVE-2009-0414).

 

* It has been reported that incomplete IPv4 addresses are treated as

valid, violating the specification (CVE-2009-0939).

 

* Three unspecified vulnerabilities have also been reported

(CVE-2009-0936, CVE-2009-0937, CVE-2009-0938).

 

Impact

======

 

A local attacker could escalate privileges by leveraging unintended

supplementary group memberships of the Tor process. A remote attacker

could exploit these vulnerabilities to cause a heap corruption with

unknown impact and attack vectors, to cause a Denial of Service via CPU

consuption or daemon crash, and to weaken anonymity provided by the

service.

 

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-0.2.0.34"

 

References

==========

 

[ 1 ] CVE-2008-5397

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5397

[ 2 ] CVE-2008-5398

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5398

[ 3 ] CVE-2009-0414

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0414

[ 4 ] CVE-2009-0936

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0936

[ 5 ] CVE-2009-0937

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0937

[ 6 ] CVE-2009-0938

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0938

[ 7 ] CVE-2009-0939

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0939

 

Availability

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

 

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

the Gentoo Security Website:

 

http://security.gentoo.org/glsa/glsa-200904-11.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 ( -at -) gentoo.org or alternatively, you may file a bug at

http://bugs.gentoo.org.

 

License

=======

 

Copyright 2009 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