RHEL 2.1 : Canna (RHSA-2002:261)
High Nessus Plugin ID 12336
SynopsisThe remote Red Hat host is missing one or more security updates.
DescriptionThe Canna server, used for Japanese character input, has two security vulnerabilities including an exploitable buffer overflow that allows a local user to gain 'bin' user privileges. 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 allows a local user to gain the privileges of the user 'bin' which can lead to further exploits. The Common Vulnerabilities and Exposures project (cve.mitre.org) 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. (CVE-2002-1159)
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.
SolutionUpdate the affected Canna, Canna-devel and / or Canna-libs packages.