Re: cisco 7200 performance issue

From: Glenn Forbes Fleming Larratt (glratt_at_rice.edu)
Date: 05/22/03

  • Next message: Gary Flynn: "Re: Possible Intrusion Attempt?" 
    Date: Thu, 22 May 2003 15:31:37 -0500 (CDT)
To: <incidents@securityfocus.com>

    You may want to check -

    http://www.cisco.com/warp/public/707/ssh-packet-suite-vuln.shtml

            -g

    On Wed, 21 May 2003, Luciano Z wrote:

    > Hi!
    >
    > I was responding an incident last night and saw a
    > strange performance problem with a cisco 7200.
    >
    > When I issued a "sh interface" on the two fast
    > ethernets of my box it was show that I got only 6Mbps
    > traffic and normal packet per second rate but when I
    > "sh logg" the box I got a lot of
    > "%RCMD-4-RSHPORTATTEMPT: Attempted to connect to
    > RSHELL from x.y.z.w" messages with spoofed sources.
    >
    > Investigating a little more I discovered that this
    > traffic was pushing the CPU to 98% to 100% of
    > utilization. Back to the output of "sh logg" I saw
    > that the box was logging 2 to 3 RSHELL messages per
    > second. In my opinion this coulndīt affect the CPU so
    > much. The router have 256M of RAM and itīs a 7200!
    >
    > I coulndīt gather more info about this incident
    > because it stopped before I could get the data. The
    > strange thing itīs that the high CPU utilization
    > stopped too.
    >
    > I donīt know if this is a problem of this cisco model
    > or if Iīm missing something. Any ideias?
    >
    > []
    > lwulff
    >

                                    Glenn Forbes Fleming Larratt
                                    Rice University Network Management
                                    glratt@rice.edu

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