Wireshark 1.6.1 Malformed IKE Packet Denial of Service

Wireshark 1.6.1 Malformed IKE Packet Denial of Service

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I. Summary

A flaw has been identified in Wireshark 1.6.1 concerning IKEv1 protocol dissector and the
function proto_tree_add_item() ,when add more than 1000000 items to a proto_tree,that will
cause a denial of service (denial of service and memory rising ).

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II. Description

Wireshark use the function proto_tree_add_item() to add an item to a proto_tree.When we use
filter expression 'isakmp' to look up a malformed IKE packet (Next Payload = DELETE (12),
Exchange Type = Information (5) with no actual payload data) and click on the resultant list
entry,wireshark will run in the function TRY_TO_FAKE_THIS_ITEM(tree, hfindex, hfinfo),there are
more than 1000000 items in the tree, this will cause an infinite loop,then cause denial of
service and memory rising.

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III. Impact

Denial of service

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IV. Affected

Wireshark 1.6.1, tested with Windows XP SP2. Previous versions may also be affected due to
code reuse.

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V. Solution

There is no known workaround at this time.

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VI. Credit

The penetration test team Of NCNIPC (China) is credited for this vulnerability.