[SAFER 000209.EXP.1.2] Zeus Web Server - obtaining source of CGI scripts

[vanja () RELAYGROUP COM (Vanja Hrustic)]

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      S.A.F.E.R. Security Bulletin 000209.EXP.1.2
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TITLE: Zeus Web Server - obtaining source of CGI scripts
DATE: February 09, 2000
NATURE: Remote user can obtain access to sources of CGI scripts
AFFECTED: Zeus Web Server 3.1.x and 3.3.x
FIXES: Zeus Web Server 3.3.5a is not vulnerable

DETAILS:

Sources of CGI scripts (and other files) can be read by any user, if the
'%00' string is appended to the name of the CGI script.

Following strings can also be appended in order to reveal the source:

%G0
%W0
%EW
%FG
%UW
%VG

PROBLEM:

The Zeus Web server is vulnerable to a problem that allows remote users
to see the source of CGI scripts. Any user can append '%00' to the name
of the CGI script and view the source. Files in directories that are
configured to contain executable scripts (/cgi-bin, for example) are not
the subject to this problem.

FIXES:

Zeus Technology has responded immediately, and fixed the problem in
matter of hours. It is really a pleasure to get such a quick response
from the vendor. All kudos to them.

The fixed version is available at:

ftp://ftp.zeustechnology.com/pub/products/z3

All customers are advised to upgrade.

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   S.A.F.E.R. - Security Alert For Entreprise Resources
          Copyright (c) 2000 The Relay Group
 http://safer.siamrelay.com  ---  security () relaygroup com
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