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Security Advisory                                                       CERT-NL
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Author/Source : Don Stikvoort (CERT-NL)                     Index  :    S-92-23
Distribution  : SURFnet constituency                        Page   :          1
Classification: External                                    Version:      Final
Subject       : additional info concerning DOS CHKDSK bug   Date   :  11-dec-92
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CERT-NL received information from Karel Sprenger, IC/IT, University of 
Amsterdam, about how to track the revision level of the DOS version you're 
working with.
Please regard this information as an addition to advisory S-92-22 . 

The trick is to use a hidden feature of the "ver" command:

  ver /r

will show not only the DOS version, but also it's revision level.

This is particularly useful when in doubt about the shipment date of 
a peticular DOS 5.0 version: ver /r can tell wether yours is the "safe" (with
regards tot the reported problem) revision level A or higher, or whether it is 
not, in which case it is advisable to upgrade your 5.0 version.

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CERT-NL is the Computer Emergency Response Team, located in The
Netherlands. CERT-NL is a Full Member of the Forum of Incident Response
and Security Teams (FIRST). The constituency of CERT-NL are the SURFnet
connected institutions.

Past CERT-NL Security Bulletins and other CERT-NL related material can
be found on the anonymous FTP server of SURFnet bv:
"ftp.nic.surfnet.nl" [192.87.46.3], in the directory "netman/cert-nl".
This information is also available using email. Send an email saying
"help" to "mailserv@nic.surfnet.nl".

In case of computer or network security problems please contact CERT-NL
or the CERT of your own constituency. Please be aware of the fact that
we are are one hour ahead of Universal Time Coordinated (i.e. UTC+0100).
Email:     cert-nl@surfnet.nl
Phone:     +31 30 310290
Fax:       +31 30 340903
Snailmail: SURFnet bv
           Attn. CERT-NL
           P.O. Box 19035
           NL - 3501 DA  UTRECHT
           The Netherlands
A 7*24h phonenumber is available to SURFnet SSC's and FIRST members on request
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