Security update for package canna

Knowledgebase

(Last modified: 12DEC2002)

solutions Security update for package canna SuSE Linux Maintenance Web (98a4d0bbd7fdc09cdce6b4b477f4fa4c)

Applies to

Product(s): SuSE Linux Enterprise Server for S/390
SuSE Linux Enterprise Server 7 for PowerPC
SuSE Linux Enterprise Server 7 for IBM zSeries
SuSE Linux Enterprise Server 8 for x86
SuSE Linux Enterprise Server 8 for IBM iSeries and IBM pSeries
SuSE Linux Enterprise Server 8 for IBM S/390 and IBM zSeries
SuSE Linux Enterprise Server 8 for IBM zSeries
SuSE Linux Openexchange Server 4

Package: canna
Release: 20021212
Obsoletes: none

Indications

This update should be installed on all systems that have the canna package installed.

Contraindications

None.

Problem description

There is a heap overflow vulnerability in the irw_through() function of the canna server which could be exploited by a malicious user to potentially gain privileges of the running canna server or cause a denial of service attack.
By default, the canna package on SuSE Linux comes already with a /etc/hosts.canna file which restricts the access to local users, i.e. only local users could exploit this vulnerability when the default setup of the SuSE canna package was unchanged. There are some other vulnerabilities because requests are not validated in several places, which could be exploited by local and remote users to cause a denial of service attack and to peep some information which might be used to exploit the above heap overflow vulnerability.
For more information see also: http://canna.sourceforge.jp/sec/Canna-2002-01.txt

Solution

Please install the updates provided at the location noted below.

Installation notes

This update is provided as an RPM package that can easily be installed onto a running system by using this command:
rpm -Uvh canna.rpm

links to download packages

Download Source Packages

Download the source code of the patches for maintained products.

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