Date: Thu, 18 Feb 1999 17:50:39 -0700
From: Caldera Systems Information <info@calderasystems.com>
To: caldera-announce@rim.caldera.com
Subject: SECURITY [CSSA-1999:004.0] -- Buffer overflow in wu-ftpd

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______________________________________________________________________________
		   Caldera Systems, Inc.  Security Advisory

Subject: 		Buffer overflow in wu-ftpd
Advisory number: 	CSSA-1999:004.0
Issue date: 		1999 Feb 18
Cross reference: 	none
______________________________________________________________________________


1. Problem Description

   There is a buffer overflow in wu-ftpd's handling of the MKD and DELE
   commands with a path name that, combined with the current directory,
   exceeds 1024 bytes.   

   This can be exploited to gain root privileges.


2. Vulnerable Versions

   Systems: 	OpenLinux 1.0, 1.1, 1.2, 1.3.
   Packages: 	< wu-ftpd-2.4.2b17-8.i386.rpm


3. Solutions

   The proper solution is to upgrade to the wu-ftpd-2.4.2b17-8 package. 


4. Location of Fixed Packages

   The upgrade packages can be found on Caldera's FTP site at:

   ftp://ftp.caldera.com/pub/OpenLinux/updates/1.3/current/RPMS/

   The corresponding source code package can be found at:

   ftp://ftp.caldera.com/pub/OpenLinux/updates/1.3/current/SRPMS


5. Installing Fixed Packages

   Upgrade the affected packages with the following commands:

   rpm -q wu-ftpd && rpm -U wu-ftpd-2.4.2b17-8.i386.rpm


6. Verification

   For instructions about verifying the authenticity of these packages refer
   to:

   http://www.calderasystems.com/news/security/verification.html
   
   The MD5 checksums (from the "md5sum" command) for these packages are:

   6b6b1217797ed1f71654eeaf7a3cc492  RPMS/wu-ftpd-2.4.2b17-8.i386.rpm
   20ad071a8cd2d1654fc911be099ff962  SRPMS/wu-ftpd-2.4.2b17-8.src.rpm


7. References

   This and other Caldera security resources are located at:

   http://www.calderasystems.com/news/security/index.html
  
   This security fix closes Caldera's internal Problem Report 4265.


8. Disclaimer

   Caldera Systems, Inc. is not responsible for the misuse of any of the
   information we provide on this website and/or through our security
   advisories. Our advisories are a service to our customers intended to
   promote secure installation and use of Caldera OpenLinux.
______________________________________________________________________________


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