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Zero Day Initiative Advisory 10-265

Zero Day Initiative Advisory 10-265
Posted Dec 10, 2010
Authored by Tipping Point | Site zerodayinitiative.com

Zero Day Initiative Advisory 10-265 - This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Mozilla Firefox. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within Firefox's management of the JSSLOT_ARRAY_COUNT annotation. This value represents the number of items filled within a given Array object. If an attacker creates an array to a high enough value, an initialization routine can be made to mis-allocate a buffer. This can be abused by an attacker to corrupt memory and subsequently execute arbitrary code under the context of the user running the browser.

tags | advisory, remote, arbitrary
advisories | CVE-2010-3767
MD5 | e0312be2eef4bc2b936dd5cfe202c10a

Zero Day Initiative Advisory 10-265

Change Mirror Download
ZDI-10-265: Mozilla Firefox NewIdArray Integer Overflow Remote Code Execution Vulnerability

http://www.zerodayinitiative.com/advisories/ZDI-10-265

December 9, 2010

-- CVE ID:
CVE-2010-3767

-- CVSS:
9, (AV:N/AC:L/Au:N/C:P/I:P/A:C)

-- Affected Vendors:
Mozilla Firefox

-- Affected Products:
Mozilla Firefox 3.6.x

-- Vulnerability Details:
This vulnerability allows remote attackers to execute arbitrary code on
vulnerable installations of Mozilla Firefox. User interaction is
required to exploit this vulnerability in that the target must visit a
malicious page or open a malicious file.

The specific flaw exists within Firefox's management of the
JSSLOT_ARRAY_COUNT annotation. This value represents the number of items
filled within a given Array object. If an attacker creates an array to a
high enough value, an initialization routine can be made to mis-allocate
a buffer. This can be abused by an attacker to corrupt memory and
subsequently execute arbitrary code under the context of the user
running the browser.

-- Vendor Response:
Mozilla Firefox has issued an update to correct this vulnerability. More
details can be found at:

http://www.mozilla.org/security/announce/2010/mfsa2010-81.html

-- Disclosure Timeline:
2010-09-24 - Vulnerability reported to vendor
2010-12-09 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
* regenrecht

-- About the Zero Day Initiative (ZDI):
Established by TippingPoint, 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:

http://www.zerodayinitiative.com

The ZDI is unique in how the acquired vulnerability information is
used. TippingPoint does not re-sell the vulnerability details or any
exploit code. Instead, upon notifying the affected product vendor,
TippingPoint 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, TippingPoint
provides this vulnerability information confidentially to security
vendors (including competitors) who have a vulnerability protection or
mitigation product.

Our vulnerability disclosure policy is available online at:

http://www.zerodayinitiative.com/advisories/disclosure_policy/

Follow the ZDI on Twitter:

http://twitter.com/thezdi


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