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Home >> Browse Vulnerability Assessment Database >> Red Hat Local Security Checks >> RHSA-2002-261: Canna

Vulnerability Assessment Details

RHSA-2002-261: Canna

Vulnerability Assessment Summary
Check for the version of the Canna packages

Detailed Explanation for this Vulnerability Assessment

The Canna server, used for Japanese character input, has two security
vulnerabilities including an exploitable buffer overflow that permits a
user to gain 'bin' user rights. Updated packages for Red Hat Linux
Advanced Server are available.

[Updated 13 Jan 2003]
Added fixed packages for the Itanium (IA64) architecture.

[Updated 06 Feb 2003]
Added fixed packages for Advanced Workstation 2.1

Canna is a kana-kanji conversion server which is necessary for Japanese
language character input.

A buffer overflow bug in the Canna server up to and including version 3.5b2
permits a local user to gain the rights of the user 'bin' which can
lead to further exploits. The Common Vulnerabilities and Exposures project
( has assigned the name CVE-2002-1158 to this issue.

In addition, it was discovered that request validation was lacking in Canna
server versions 3.6 and earlier. A malicious remote user could exploit this
vulnerability to leak information or cause a denial of service attack.

Red Hat Linux Advanced Server ships with a Canna package vulnerable
to these issues
however, the package is normally only installed when
Japanese language support is selected during installation.

All users of Canna are advised to upgrade to these errata packages which
contain a backported security fix and are not vulnerable to this issue.

Red Hat would like to thank hsj and AIDA Shinra for the responsible
disclosure of these issues.

Solution :
Network Security Threat Level: High

Networks Security ID:

Vulnerability Assessment Copyright: This script is Copyright (C) 2004 Tenable Network Security

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