Rule:

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Sid:
3679

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Summary:
This event is generated when an attempt is made to exploit a
vulnerability associated with Mozilla Firefox when processing the IFRAME
tag.

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Impact:
A successful attack may permit execution of arbitrary code on a
vulnerable client.

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Detailed Information:
A vulnerability exists in the way Mozilla Firefox handles the value
supplied to the IFRAME tag "src" keyword.  Ordinarily the "src" keyword
is used to supply the the URL of the document to display in the new
frame created by the IFRAME tag. However, if supplied malcious
javascript, it is possible to execute arbitrary code on a vulnerable
client.

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Affected Systems:
	Mozilla Firefox 1.0.3 and previous versions
	Mozilla Suite 1.7.7 and previous versions

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Attack Scenarios:
An attacker can entice a user to visit a malicious website that can
execute arbitrary code on a vulnerable client.

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Ease of Attack:
Simple. Exploits exist.

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False Positives:
High potential for false positives.
This rule is disabled by default.

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False Negatives:
In order to avoid potential evasion techniques, http_inspect should be
configured with "flow_depth 0" so that all HTTP server response traffic
is inspected.

WARNING
Setting flow_depth 0 will cause performance problems in some situations.
WARNING

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Corrective Action:
Upgrade to the most current non-affected version of the product.

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Contributors:
Sourcefire Research Team
Judy Novak <judy.novak@sourcefire.com>
Brian Caswell <bmc@sourcefire.com>

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Additional References

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