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North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Cisco Vulnerability Testing Results
Hi all, First post.. I hope this is ok ... We tested the Cisco vulnerability and I wanted to share our results with you ... The attack code we used is the same code that was posted to the Full Disclosure list. Compiled on a Redhat Linux 6.2 machine. Testing scenario is this : Linux Machine (10.0.0.2/24) Cisco 2514 Ethernet0 (10.0.0.1/24) is in from the attacker Ethernet1 (192.168.0.1/24) is output to the 2501 Cisco 2501 Ethernet0 (192.168.0.2/24) is in from the 2514 First attack was to the 2514, ran the program as thus : ./sc 192.168.0.1 1 This produced unexpected results. Cisco indicated that the vulnerability was on the interface specified in the packets. However, after running this, it was actually the INPUT interface that the input queue increased on. In our test, this was Ethernet0, not Ethernet1 as expected. Next attach was to the 2501 : ./sc 192.168.0.2 2 This produced expected results. Input queue did increase on the 2501. Next we tried a pass-through attack : ./sc 192.168.0.2 0 ./sc 192.168.0.2 1 No interfaces on either Cisco were affected. It seems that pass-through attacks are not possible. The attack *must* terminate on an IP on one of the router interfaces. An additional test to both routers using a high TTL value was also run. No interfaces were affected. This is in-line with Cisco's posting. Code was then upgraded on the 2514 to 12.0.27 (non-vulnerable) .. Tests were run again. This time, the 2514 was not affected by any tests. The 2501 was still vulnerable. I will be testing ACL's in a moment, but I wanted to get these results out and see if they were on-par with any testing anyone else has done. -- --------------------------- Jason H. Frisvold Backbone Engineering Supervisor Penteledata Engineering [email protected] RedHat Engineer - RHCE # 807302349405893 Cisco Certified - CCNA # CSCO10151622 MySQL Core Certified - ID# 205982910 --------------------------- "Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world." -- Albert Einstein [1879-1955] Attachment:
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