[RHSA-2002:062-08] Insecure DocBook stylesheet option

2002-05-03T00:00:00
ID SECURITYVULNS:DOC:2891
Type securityvulns
Reporter Securityvulns
Modified 2002-05-03T00:00:00

Description


               Red Hat, Inc. Red Hat Security Advisory

Synopsis: Insecure DocBook stylesheet option Advisory ID: RHSA-2002:062-08 Issue date: 2002-04-11 Updated on: 2002-04-26 Product: Red Hat Linux Keywords: docbook stylesheet Cross references: RHSA-2002:061 Obsoletes:


  1. Topic:

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.

  1. Relevant releases/architectures:

Red Hat Linux 6.2 - noarch

Red Hat Linux 7.0 - noarch

Red Hat Linux 7.1 - noarch

Red Hat Linux 7.2 - noarch

  1. Problem description:

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.

  1. Solution:

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.

  1. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info):

  2. RPMs required:

Red Hat Linux 6.2:

SRPMS: ftp://updates.redhat.com/6.2/en/os/SRPMS/stylesheets-1.54.13rh-1.1.src.rpm

noarch: ftp://updates.redhat.com/6.2/en/os/noarch/stylesheets-1.54.13rh-1.1.noarch.rpm

Red Hat Linux 7.0:

SRPMS: ftp://updates.redhat.com/7.0/en/os/SRPMS/stylesheets-1.54.13rh-5.1.src.rpm

noarch: ftp://updates.redhat.com/7.0/en/os/noarch/stylesheets-1.54.13rh-5.1.noarch.rpm

Red Hat Linux 7.1:

SRPMS: ftp://updates.redhat.com/7.1/en/os/SRPMS/docbook-utils-0.6-13.2.src.rpm

noarch: ftp://updates.redhat.com/7.1/en/os/noarch/docbook-utils-0.6-13.2.noarch.rpm ftp://updates.redhat.com/7.1/en/os/noarch/docbook-utils-pdf-0.6-13.2.noarch.rpm

Red Hat Linux 7.2:

SRPMS: ftp://updates.redhat.com/7.2/en/os/SRPMS/docbook-utils-0.6.9-2.1.src.rpm

noarch: ftp://updates.redhat.com/7.2/en/os/noarch/docbook-utils-0.6.9-2.1.noarch.rpm ftp://updates.redhat.com/7.2/en/os/noarch/docbook-utils-pdf-0.6.9-2.1.noarch.rpm

  1. Verification:

MD5 sum Package Name

263e520f94a1685cef9f1e4cafc8e485 6.2/en/os/SRPMS/stylesheets-1.54.13rh-1.1.src.rpm 7065d23d1f0c1f7e9903d642f45e2b14 6.2/en/os/noarch/stylesheets-1.54.13rh-1.1.noarch.rpm 5147e48a9799d6c4be9e61986628cc9a 7.0/en/os/SRPMS/stylesheets-1.54.13rh-5.1.src.rpm e1ce94d77e1bb5dbfda409b6f53f9858 7.0/en/os/noarch/stylesheets-1.54.13rh-5.1.noarch.rpm faa79f4d0d834fb4ddb5a82ec9d2ad64 7.1/en/os/SRPMS/docbook-utils-0.6-13.2.src.rpm affe6a01d519aedbf1f25783650e9e2a 7.1/en/os/noarch/docbook-utils-0.6-13.2.noarch.rpm e56145c2247e7cc05f3dddba079db3cd 7.1/en/os/noarch/docbook-utils-pdf-0.6-13.2.noarch.rpm 1d68f5de2052550307fbb3182f751915 7.2/en/os/SRPMS/docbook-utils-0.6.9-2.1.src.rpm e6b43a27e4712ee6a91871605092acab 7.2/en/os/noarch/docbook-utils-0.6.9-2.1.noarch.rpm a45e3dddc9f3269c3db77bd153697df3 7.2/en/os/noarch/docbook-utils-pdf-0.6.9-2.1.noarch.rpm

These packages are GPG signed by Red Hat, Inc. for security. Our key is available at: http://www.redhat.com/about/contact/pgpkey.html

You can verify each package with the following command: rpm --checksig <filename>

If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command: rpm --checksig --nogpg <filename>

  1. References:

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

Copyright(c) 2000, 2001, 2002 Red Hat, Inc.