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IMPORTANT: Security bugfix for Samba - all versions
---------------------------------------------------
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
The md5 checksum of this new version is:
27ac28ccf084268ba5c8c0b3a0ed12e4 b 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.
The "Samba Survey" containing the current list of Samba users that is
hosted on the Samba Web site has been temporarily suspended to remove
a list of potentially vulnerable sites. All users on this list will
be contacted and encouraged to upgrade.
Any new information will be made available on the Samba WWW site at
To report bugs and ask questions about the fix please email :
samba-bugs@samba.anu.edu.au.
The Samba Team
samba-bugs@samba.anu.edu.au
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========================FORWARDED TEXT ENDS HERE=============================
If you believe that your system has been compromised, contact the CERT
Coordination Center or your representative in the Forum of Incident Response
and Security Teams (FIRST). See .
We strongly urge you to encrypt any sensitive information you send by email.
The CERT Coordination Center can support a shared DES key and PGP. Contact
the CERT staff for more information.
Location of CERT PGP key
ftp://ftp.cert.org/pub/CERT_PGP.key
CERT Contact Information
- ------------------------
Email cert@cert.org
Phone +1 412-268-7090 (24-hour hotline)
CERT personnel answer 8:30-5:00 p.m. EST
(GMT-5)/EDT(GMT-4), and are on call for
emergencies during other hours.
Fax +1 412-268-6989
Postal address
CERT Coordination Center
Software Engineering Institute
Carnegie Mellon University
Pittsburgh PA 15213-3890
USA
CERT publications, information about FIRST representatives, and other
security-related information are available from
ftp://ftp.cert.org/pub/
CERT advisories and bulletins are also posted on the USENET newsgroup
comp.security.announce
To be added to our mailing list for CERT advisories and bulletins, send your
email address to
cert-advisory-request@cert.org
In the subject line, type
SUBSCRIBE your-email-address
* Registered U.S. Patent and Trademark Office.
The CERT Coordination Center is part of the Software Engineering
Institute (SEI). The SEI is sponsored by the U. S. Department of Defense.
This file: ftp://ftp.cert.org/pub/cert_bulletins/VB-97.10.samba
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Timofei Cherkasov; Baltic Group, MIS.
Phone: +7 (812) 278-84-18; Fax:+7 (812) 278-84-17
RadioPage: 20962 +7 (812) 327-87-47, 293-90-11, 293-90-01
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