Security problems in some looking glasses!

From: Zvezdelin Vladov (zvezdi_vat_private)
Date: Mon Oct 01 2001 - 13:10:08 PDT

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    PROBLEM DESCRIPTION:
    ====================
    Some looking glasses (they are many)
    pass control chars through the user interface
    to the router.
    
    Result:
    =======
    User may receive remote access to you router
    and issue commands under the user of your
    looking glass.
    
    All information that regular user (or the
    looking glass user may obtain) are avaialble
    including 
    
    sh in 
    sh ver
    sh route-map
    sh access-l
    sh traffic-shape
    sh log
    
    whatever sensetive the looking glass user has
    access to.
    
    
    WHO IS AFFECTED
    ===============
    
    Not all looking glasses are affected.
    
    If you issue [some control chars] 
    for example to the looking glass prompt box
    and receive "invalid autocommand ...."
    you are not affected, but if you receive
    the prompt of the router, or the resulted command,
    you are affected.
    
    
    FIX
    ===
    Exclude the commands, looking glass user should
    not issue from the current priv level of the
    cisco router. The latter has been commented on
    this list.
    There are maybe others, like changeing the source
    of the looking glass.
    
    Zvezdelin Vladov
    
    
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