Yellow Dog Linux Security Announcement
--------------------------------------

Package:	docbook-utils	
Issue Date: 	May 02, 2002	
Priority:	medium		
Advisory ID: 	YDU-20020502-7


1. 	Topic:

	Updated docbook-utils packages are available.


2. 	Problem:

	"DocBook is a document markup language that can be transformed
	into other formats using a stylesheet. The default stylesheet
	provided with [Yellow Dog] 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."
	(from the Red Hat Advisory)


3. 	Solution:

   	a) Updating via yup...
   	We suggest that you use the Yellow Dog Update Program (yup)
   	to keep your system up-to-date. The following command(s) will
   	automatically retrieve and install the fixed version of
   	this update onto your system:

		yup update docbook-utils 

   	b) Updating manually...
   	The update can also be retrieved manually from our ftp site
   	below along with the rpm command that should be used to install
   	the update.  (Please use a mirror site)

   		ftp://ftp.yellowdoglinux.com/pub/yellowdog/updates/yellowdog-2.2/ppc/
		rpm -Fvh docbook-utils-*0.6.9-25.noarch.rpm

4. Verification

MD5 checksum			  Package
--------------------------------  ----------------------------
c6640f77bd37f9a57573d2cac907cb45  ppc/docbook-utils-0.6.9-25.noarch.rpm
21cefbc5a74eedec36f99b2fc8b706ba  ppc/docbook-utils-pdf-0.6.9-25.noarch.rpm
53387163a53e663259603a617b1cd0c9  SRPMS/docbook-utils-0.6.9-25.src.rpm

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


5. Misc.

Terra Soft has setup a moderated mailing list where these security, bugfix, and package
enhancement announcements will be posted. See http://lists.yellowdoglinux.com/ for more
information.

For information regarding the usage of yup, the Yellow Dog Update Program, see 
http://http://www.yellowdoglinux.com/support/solutions/ydl_general/yup.shtml