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Neohapsis > Archives > Bugtraq> 2002-03

From: secureconectiva.com.br
Date: Wed Mar 06 2002 - 13:44:16 CST

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CONECTIVA LINUX SECURITY ANNOUNCEMENT
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PACKAGE : radiusd-cistron
SUMMARY : Multiple vulnerabilities
DATE : 2002-03-06 16:43:00
ID : CLA-2002:466
RELEVANT
RELEASES : 5.0, prg graficos, ecommerce, 5.1, 6.0, 7.0

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DESCRIPTION
Cistron RADIUS is an authentication and accounting server for
terminal servers that speak the RADIUS (Remote Authentication Dial In
User Service) protocol.

Alan DeKok reported[1] some vulnerabilities in multiple RADIUS server
implementations (including radius-cistron).

radius-cistron prior to 1.6.6 was vulnerable to:

- A buffer overflow in a message digest calculation[2] that could let
an attacker to sucessfully run a Deny of Service (DoS) attack againt
the server. If the attacker also knows the shared secret (discovering
it is not a trivial task), there's a possibility to exploit this
vulnerability to execute arbitrary code in the remote machine (with
root privileges).

- A failure to check the vendor-length of vendor-specific attributes,
also possibiliting a Denial of Service attack against RADIUS
servers.

There's a complete advisory[3] with more information available from
CERT® addressing these vulnerabilities.

SOLUTION
All radius-cistron users should upgrade. This update will
automatically restart the service if it's running.

REFERENCES:
1.http://online.securityfocus.com/archive/1/239943
2.http://online.securityfocus.com/bid/3530
3.http://www.cert.org/advisories/CA-2002-06.html

ADDITIONAL INSTRUCTIONS
Users of Conectiva Linux version 6.0 or higher may use apt to perform
upgrades of RPM packages:
- add the following line to /etc/apt/sources.list if it is not there yet
(you may also use linuxconf to do this):

rpm [cncbr] ftp://atualizacoes.conectiva.com.br 6.0/conectiva updates

(replace 6.0 with the correct version number if you are not running CL6.0)

- run: apt-get update
- after that, execute: apt-get upgrade

Detailed instructions reagarding the use of apt and upgrade examples
can be found at http://distro.conectiva.com.br/atualizacoes/#apt?idioma=en

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All packages are signed with Conectiva's GPG key. The key and instructions
on how to import it can be found at
http://distro.conectiva.com.br/seguranca/chave/?idioma=en
Instructions on how to check the signatures of the RPM packages can be
found at http://distro.conectiva.com.br/seguranca/politica/?idioma=en
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All our advisories and generic update instructions can be viewed at
http://distro.conectiva.com.br/atualizacoes/?idioma=en

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subscribe: conectiva-updates-subscribepapaleguas.conectiva.com.br
unsubscribe: conectiva-updates-unsubscribepapaleguas.conectiva.com.br
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