[gentoo-announce] [ GLSA 200905-01 ] Asterisk: Multiple vulnerabilities

[news 28]

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Gentoo Linux Security Advisory GLSA 200905-01

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http://security.gentoo.org/

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Severity: Normal

Title: Asterisk: Multiple vulnerabilities

Date: May 02, 2009

Bugs: #218966, #224835, #232696, #232698, #237476, #250748,

#254304

ID: 200905-01

 

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Synopsis

========

 

Multiple vulnerabilities have been found in Asterisk allowing for

Denial of Service and username disclosure.

 

Background

==========

 

Asterisk is an open source telephony engine and toolkit.

 

Affected packages

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

 

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

Package / Vulnerable / Unaffected

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

1 net-misc/asterisk < 1.2.32 >= 1.2.32

 

Description

===========

 

Multiple vulnerabilities have been discovered in the IAX2 channel

driver when performing the 3-way handshake (CVE-2008-1897), when

handling a large number of POKE requests (CVE-2008-3263), when handling

authentication attempts (CVE-2008-5558) and when handling firmware

download (FWDOWNL) requests (CVE-2008-3264). Asterisk does also not

correctly handle SIP INVITE messages that lack a "From" header

(CVE-2008-2119), and responds differently to a failed login attempt

depending on whether the user account exists (CVE-2008-3903,

CVE-2009-0041).

 

Impact

======

 

Remote unauthenticated attackers could send specially crafted data to

Asterisk, possibly resulting in a Denial of Service via a daemon crash,

call-number exhaustion, CPU or traffic consumption. Remote

unauthenticated attackers could furthermore enumerate valid usernames

to facilitate brute force login attempts.

 

Workaround

==========

 

There is no known workaround at this time.

 

Resolution

==========

 

All Asterisk users should upgrade to the latest version:

 

# emerge --sync

# emerge --ask --oneshot --verbose ">=net-misc/asterisk-1.2.32"

 

References

==========

 

[ 1 ] CVE-2008-1897

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-1897

[ 2 ] CVE-2008-2119

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2119

[ 3 ] CVE-2008-3263

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3263

[ 4 ] CVE-2008-3264

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3264

[ 5 ] CVE-2008-3903

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-3903

[ 6 ] CVE-2008-5558

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5558

[ 7 ] CVE-2009-0041

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0041

 

Availability

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

 

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

the Gentoo Security Website:

 

http://security.gentoo.org/glsa/glsa-200905-01.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