RHSA-2004:635 - Security Advisory

Topic

An updated ruby package that fixes a denial of service issue for the CGI
instance is now available.

[Updated 17 Jan 2005]
Errata has been updated to include 32-bit libraries on 64-bit architectures.

Description

Ruby is an interpreted scripting language for object-oriented programming.

A flaw was dicovered in the CGI module of Ruby. If empty data is sent by
the POST method to the CGI script which requires MIME type
multipart/form-data, it can get stuck in a loop. A remote attacker could
trigger this flaw and cause a denial of service. The Common
Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name
CAN-2004-0983 to this issue.

Users are advised to upgrade to this erratum package, which contains a
backported patch to cgi.rb.

Solution

Before applying this update, make sure that all previously-released
errata relevant to your system have been applied. Use Red Hat
Network to download and update your packages. To launch the Red Hat
Update Agent, use the following command:

up2date

For information on how to install packages manually, refer to the
following Web page for the System Administration or Customization
guide specific to your system:

http://www.redhat.com/docs/manuals/enterprise/

Affected Products

• Red Hat Enterprise Linux Server 3 x86_64
• Red Hat Enterprise Linux Server 3 ia64
• Red Hat Enterprise Linux Server 3 i386
• Red Hat Enterprise Linux Server 2 i386
• Red Hat Enterprise Linux Workstation 3 x86_64
• Red Hat Enterprise Linux Workstation 3 ia64
• Red Hat Enterprise Linux Workstation 3 i386
• Red Hat Enterprise Linux Workstation 2 i386
• Red Hat Enterprise Linux Desktop 3 x86_64
• Red Hat Enterprise Linux Desktop 3 i386
• Red Hat Enterprise Linux for IBM z Systems 3 s390x
• Red Hat Enterprise Linux for IBM z Systems 3 s390
• Red Hat Enterprise Linux for Power, big endian 3 ppc

Fixes

• BZ - 138362 - CAN-2004-0983 Denial of Service in Ruby

CVEs

• CVE-2004-0983

References

(none)