Insecure DocBook stylesheet option

DocBook is a document markup language that can be transformed into
other formats using a stylesheet. The default stylesheet provided
with Red Hat Linux has an insecure option enabled.

The default stylesheet used when converting a DocBook document to
multiple HTML files allows an untrusted document to write files
outside of the current directory. This is because element
identifiers (specified in the document) are used to form the names of
the output files. If an untrusted document uses a full pathname as an
identifier, it can cause that file to be written to -- as long as the
user performing the conversion has write access.

Updated docbook-utils packages are available that disable this
feature and enable filenames to be generated based on the type
of the element rather than its identifier.

The Common Vulnerabilities and Exposures project (cve.mitre.org) has
assigned the name CAN-2002-0169 to this issue.

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

To update all RPMs for your particular architecture, run:

rpm -Fvh [filenames]

where [filenames] is a list of the RPMs you wish to upgrade. Only those
RPMs which are currently installed will be updated. Those RPMs which are
not installed but included in the list will not be updated. Note that you
can also use wildcards (*.rpm) if your current directory *only* contains
the
desired RPMs.

Please note that this update is also available via Red Hat Network. Many
people find this an easier way to apply updates. To use Red Hat Network,
launch the Red Hat Update Agent with the following command:

up2date

This will start an interactive process that will result in the appropriate
RPMs being upgraded on your system.

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2002-0169
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-0169

docbook, stylesheet