full-disclosure - ZDI-09-022: Apple Safari Malformed SVGList Parsing Code Execution Vulnerability

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Message-ID: <C6386D89.17571%zdi-disclosures@tippingpoint.com>
Date: Tue, 19 May 2009 14:07:05 -0500
From: ZDI Disclosures <zdi-disclosures@...pingpoint.com>
To: FD <full-disclosure@...ts.grok.org.uk>, bugtraq <bugtraq@...urityfocus.com>
Cc: ZDI Disclosures <zdi-disclosures@...pingpoint.com>
Subject: ZDI-09-022: Apple Safari Malformed SVGList
 Parsing Code Execution Vulnerability

ZDI-09-022: Apple Safari Malformed SVGList Parsing Code Execution
Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-09-022
May 13, 2009

-- CVE ID:
CVE-2009-0945

-- Affected Vendors:
Apple

-- Affected Products:
Apple Safari

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 6960.
For further product information on the TippingPoint IPS, visit:

    http://www.tippingpoint.com

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

The specific flaw exists during the parsing of malformed SVGLists via
the SVGPathList data structure, the following lists are affected:
SVGTransformList, SVGStringList, SVGNumberList, SVGPathSegList,
SVGPointList, SVGLengthList. When a negative index argument is suppled
to the insertItemBefore() method, a memory corruption occurs resulting
in the ability to execute arbitrary code.

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

http://support.apple.com/kb/HT3549

-- Disclosure Timeline:
2009-03-19 - Vulnerability reported to vendor
2009-05-13 - Coordinated public release of advisory

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

-- 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/

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