Re: Solaris sadmind Buffer Overflow Vulnerability

From: Brad Powell (Brad.Powellat_private)
Date: Fri Dec 10 1999 - 13:12:10 PST

  • Next message: Brad Powell: "Re: sadmind again"

    Hi >Alfred,
    
    >
    >The exploit has been sent to Sun and is currently under inspection. When
    >it is publicly available it will be posted to Bugtraq and to the
    >SecurityFocus.com Vuldb.
    
    true, but not via the proper channels until recently :-(
    
    > If someone else posts this vulnerability to the
    >list, we will of course allow it.
    
    
    :-) ;^}
    
    
    >
    > Workaround:
    >
    > Unless you require sadmin (if your using the Solstice AdminSuite you do)
    >we suggest you comment sadmind out from your /etc/inetd.conf entry.
    >
    > By default, the line in /etc/inetd.conf that starts sadmind appears as
    >follows:
    >
    > 100232/10 tli rpc/udp wait root /usr/sbin/sadmind sadmind
    >
    > If you do require this service we suggest you block all access to it from
    >external networks via filtering rulesets on your router(s) or Firewall(s).
    >
    >
    
    You missed a couple other things that will help. Tcp_wrappers on the service,
    Running 'sadmind -S2' and setting the stack to noexec_user_stack =1"
    via /etc/system (from the titan module that does this)
    
    
    * Don't allow executing code on the stack
    *set noexec_user_stack = 1
    * And log it when it happens.
    *set noexec_user_stack_log = 1
    set nfssrv:nfs_portmon = 1
    
    
    ============================================================================
    Brad Powell : bradat_private (WORK: brad.powellat_private)
    Sr. Network Security Architect Sun Microsystems Inc.
    ============================================================================
    The views expressed are those of the author and may not reflect the views
    of Sun Microsystems Inc.
    ============================================================================
    



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