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

Package:	tar/unzip
Issue Date: 	October 20, 2002	
Priority:	high
Advisory ID: 	YDU-20021020-10


1. 	Topic:

	Updated tar and unzip packages are available.


2. 	Problem:

	"The unzip and tar utilities contain vulnerabilities which can allow
	arbitrary files to be overwritten during archive extraction.

	The unzip and tar utilities are used for manipulating archives, which
	are multiple files stored inside of a single file.

	A directory traversal vulnerability in unzip version 5.42 and earlier,
	as well as GNU tar 1.13.19 and earlier, allows attackers to overwrite
	arbitrary files during archive extraction via a ".." (dot dot) in an
	extracted filename. The Common Vulnerabilities and Exposures project
	(cve.mitre.org) has assigned the name CAN-2001-1267 and CAN-2001-1268 to
	this issue.

	In addition, unzip version 5.42 and earlier also allows attackers to
	overwrite arbitrary files during archive extraction via filenames in the
	archive that begin with the "/" (slash) character. The Common
	Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name
	CAN-2001-1269 to this issue.

	During testing of the fix to GNU tar, it was discovered that GNU tar
	1.13.25 was still vulnerable to a modified version of the same problem. Red
	Hat has provided a patch to tar 1.3.25 to correct this problem. The Common
	Vulnerabilities and Exposures project (cve.mitre.org) has assigned the name
	CAN-2002-0399 to this issue."
	(from Red Had advisory)


3. 	Solution:

   	a) Updating via apt...
   	We suggest that you use the apt-get program to keep your
   	system up-to-date. The following command(s) will retrieve
   	and install the fixed version of this update onto your system:

		apt-get update
		apt-get install tar unzip

   	b) Updating manually...
	Download the updates below and then run the following rpm command.
   	(Please use a mirror site)

		rpm -Fvh [filenames]
		ftp://ftp.yellowdoglinux.com/pub/yellowdog/updates/yellowdog-2.3/
			ppc/tar-2.3.9-0.73.3a.ppc.rpm
			ppc/unzip-5.50-2.ppc.rpm


4. Verification

MD5 checksum			  Package
--------------------------------  ----------------------------
218b1aa59c80092225f9d14eaf75676e  ppc/tar-2.3.9-0.73.3a.ppc.rpm
779b7bf8aa001663666675c56a432287  ppc/unzip-5.50-2.ppc.rpm
1de42ffa96d6bdf268da5fc0fdb7c848  SRPMS/tar-2.3.9-0.73.3a.src.rpm
558884cd9555d9d1be0ee906593f20ea  SRPMS/unzip-5.50-2.src.rpm

I 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.terrasoftsolutions.com/ for more
information.

For information regarding the usage of apt-get, see:
http://www.yellowdoglinux.com/support/solutions/ydl_general/apt-get.shtml