TUCoPS :: Browsers :: b06-1676.htm

Mozilla Firefox Tag Parsing Code Execution Vulnerability
ZDI-06-009: Mozilla Firefox Tag Parsing Code Execution Vulnerability
ZDI-06-009: Mozilla Firefox Tag Parsing Code Execution Vulnerability

ZDI-06-009: Mozilla Firefox Tag Parsing Code Execution Vulnerability
April 14, 2006

-- CVE ID:

-- Affected Vendor:

-- Affected Products:
Firefox 1.0 through 1.0.7
Thunderbird 1.5 through
Thunderbird 1.0 through 1.0.7
SeaMonkey 1.0
Mozilla Suite 1.7 through 1.7.12

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability since December 13, 2005 by Digital Vaccine protection
filter ID 3977. For further product information on the TippingPoint IPS:


-- Vulnerability Details:
This vulnerability allows attackers to execute arbitrary code on
vulnerable installations of the Mozilla/Firefox web browser and
Thunderbird e-mail client. User interaction is required to exploit this
vulnerability in that the target must visit a malicious page or open a
malicious e-mail.

The specific flaw exists within nsHTMLContentSink.cpp, during the
parsing of HTML tags as they appear in a specific order. The flaw
results in a memory corruption that leads to an attacker controlled
function pointer dereference from the stack and eventually execution of
arbitrary code.

-- Vendor Response:
Mozilla has issued an update to correct this vulnerability. Further
details are available at:


-- Disclosure Timeline:
2005.12.13 - Vulnerability reported to vendor
2005.12.13 - Digital Vaccine released to TippingPoint customers
2006.04.14 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by an anonymous researcher.

-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, a division of 3Com, The Zero Day Initiative
(ZDI) represents a best-of-breed model for rewarding security
researchers for responsibly disclosing discovered vulnerabilities.

Researchers interested in getting paid for their security research
through the ZDI can find more information and sign-up at:


The ZDI is unique in how the acquired vulnerability information is used.
3Com does not re-sell the vulnerability details or any exploit code.
Instead, upon notifying the affected product vendor, 3Com provides its
customers with zero day protection through its intrusion prevention
technology. Explicit details regarding the specifics of the
vulnerability are not exposed to any parties until an official vendor
patch is publicly available. Furthermore, with the altruistic aim of
helping to secure a broader user base, 3Com provides this vulnerability
information confidentially to security vendors (including competitors)
who have a vulnerability protection or mitigation product.

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