Re: Zeus Admin Server v4.1r2 index.fcgi XSS bug

From: Colin Watson (colinwat_private)
Date: Wed Dec 11 2002 - 03:40:58 PST

  • Next message: Dorin Balanica: "Input Validation Error in vbulletin 2.2.x"

    In article <3DCC12EC.000005.12196at_private>, euronymous wrote:
    >=:=:=::=:=:=::=:=:=::=:=:=::=:=:=::=:=:=::=:=:=::=
    >topic: Zeus Admin Server v4.1r2 index.fcgi XSS bug
    >product: Zeus Admin Server v4.1r2 for linux/x86
    >vendor: http://www.zeus.co.uk
    >risk: very low (authorisation required)
    >date: 11/8/2k2
    >discovered by: euronymous /F0KP /HACKRU Team
    >advisory urls: http://f0kp.iplus.ru/bz/007.txt 
    >               http://xakep.host.sk/bz/007.txt 
    >=:=:=::=:=:=::=:=:=::=:=:=::=:=:=::=:=:=::=:=:=::=
    >	      
    >description
    >-----------
    >in default Zeus installation, you can to access
    >management interface via http://hostname:9090. 
    >
    >[you have to enter correct login/password here]
    >
    >there is some general script, that contain xss bug. 
    >btw, default management login is `admin'..
    >
    >sample attack
    >-------------
    >http://hostname:9090/apps/web/index.fcgi?servers=
    >&section=<script>alert(document.cookie)</script>
    >
    >[it must be in a single string]
    
    Zeus Technology, 21st November 2002.
    "Zeus Admin Server v4.1r2 index.fcgi XSS bug" vendor response.
    
    On November 9th 2002, a cross-site-scripting attack against the Zeus
    Administration Server was reported on bugtraq (incident "Zeus Admin
    Server v4.1r2 index.fcgi XSS bug").
    
    Zeus Technology has investigated this report and confirm that a harmless
    cross-site-scripting exploit is possible under very limited conditions.
    If an attacker tricked a Zeus Administrator into following a carefully
    constructed link when logged into the Administration Server, the
    attacker could retrieve a list of group names, and monitored variable
    names and machines.  This information is not security-sensitive.  Zeus
    Technology agree with the reporter's assessment that the risk is 'very
    low'.
    
    This vulnerability is present in Zeus Web Server 4.0 and 4.1.  It has
    been resolved in Zeus Web Server 4.1r5 (released 19th Nov. 2002) and
    Zeus Web Server 4.2 (released 21st Nov. 2002).
    
    More details
    
    This exploit can be used to retrieve any information stored in cookies
    by the Zeus Administration Server.  To mount an attack, an attacker must
    have prior knowledge of the host and port that the Administration Server
    is running on, and must trick a Zeus Administrator into following a
    carefully constructed link when logged into the Administration Server.
    
    The Zeus Administration Server uses cookies to record several items of
    transient state: the state of the folding list of groups of virtual
    servers, and the list of currently monitored variables and machines if
    real-time monitoring is in place.  It does not use cookies to store any
    security-sensitive information, such as usernames or passwords.
    
    Zeus Technology continue to advise that the Administration Server is
    shut down when not in use as a matter of routine.  Zeus Technology do
    not believe that this vulnerability is serious enough to merit upgrading
    to versions 4.1r5 or 4.2.
    
    Zeus Technology work closely with customers, evaluators, security
    professionals and other researchers to ensure its products are secure
    and free from defects. Any security-related comments received at
    supportat_private, or through any other means are treated with the utmost
    attention.  Zeus Technology regret that the researcher who discovered
    this exploit did not make any attempt to contact the vendor at any time.
    
    [Apologies for the delay in getting this reply to bugtraq.]
    
    Regards,
    
    -- 
    Colin Watson, <colinwat_private>                      Zeus Technology Ltd
    Software Engineer                            Universally Serving the Net
    Tel:+44(0)1223 525000  Fax:+44(0)1223 525100        http://www.zeus.com/
    Zeus House, Cowley Road, Cambridge, CB4 0ZT, ENGLAND
    



    This archive was generated by hypermail 2b30 : Wed Dec 11 2002 - 14:06:03 PST