-----BEGIN PGP SIGNED MESSAGE----- __________________________________________________________ The U.S. Department of Energy Computer Incident Advisory Capability ___ __ __ _ ___ / | /_\ / \___ __|__ / \ \___ __________________________________________________________ INFORMATION BULLETIN Samba Servers Vulnerability September 30, 1997 18:00 GMT Number H-110 ______________________________________________________________________________ PROBLEM: A vulnerability has been discovered in all versions of Samba. PLATFORM: Servers running on Intel based platforms, specific to Intel Linux servers. DAMAGE: May allow unauthorized remote users to obtain root access. SOLUTION: Samba version 1.9.17p2 is available from the ftp address listed below. ______________________________________________________________________________ VULNERABILITY An exploit for this security hole has been posted to the ASSESSMENT: internet so system administrators should assume that this hole is being actively exploited. ______________________________________________________________________________ [ Start AUSCERT Advisory ] - ------------------------------------------------------------------------------ From: Andrew Tridgell Subject: Security bugfix for Samba Date: Fri, 26 Sep 1997 23:48:49 +1000 Security bugfix for Samba ------------------------- A security hole in all versions of Samba has been recently discovered. The security hole allows unauthorized remote users to obtain root access on the Samba server. An exploit for this security hole has been posted to the internet so system administrators should assume that this hole is being actively exploited. The exploit for the security hole is very architecture specific and has been only demonstrated to work for Samba servers running on Intel based platforms. The exploit posted to the internet is specific to Intel Linux servers. It would be very difficult to produce an exploit for other architectures but it may be possible. A new release of Samba has now been made that fixes the security hole. The new release is version 1.9.17p2 and is available from ftp://samba.anu.edu.au/pub/samba/samba-1.9.17p2.tar.gz This release also adds a routine which logs a message if anyone attempts to take advantage of the security hole. The message (in the Samba log files) will look like this: ERROR: Invalid password length 999 your machine may be under attack by a user exploiting an old bug Attack was from IP=aaa.bbb.ccc.ddd where aaa.bbb.ccc.ddd is the IP address of the machine performing the attack. Please report any attacks to the appropriate authority. The Samba Team samba-bugs@samba.anu.edu.au - ------------------------------------------------------------------------------ [ End AUSCERT Advisory ] ______________________________________________________________________________ CIAC wishes to acknowledge the contributions of AUSCERT & Andrew Tridgell (Samba) for the information contained in this bulletin. ______________________________________________________________________________ CIAC, the Computer Incident Advisory Capability, is the computer security incident response team for the U.S. Department of Energy (DOE) and the emergency backup response team for the National Institutes of Health (NIH). CIAC is located at the Lawrence Livermore National Laboratory in Livermore, California. CIAC is also a founding member of FIRST, the Forum of Incident Response and Security Teams, a global organization established to foster cooperation and coordination among computer security teams worldwide. 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If you are not part of these communities, please contact your agency's response team to report incidents. Your agency's team will coordinate with CIAC. The Forum of Incident Response and Security Teams (FIRST) is a world-wide organization. A list of FIRST member organizations and their constituencies can be obtained via WWW at http://www.first.org/. This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial products, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. 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