bugtraq - ZDI-10-076: Apple Preview libFontParser SpecialEncoding Remote Code Execution Vulnerability

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Message-ID: <EE499D69B3D0714590B6FE9762B0461104B708697D@emb01.unity.local>
Date: Wed, 14 Apr 2010 22:00:42 -0500
From: ZDI Disclosures <zdi-disclosures@...pingpoint.com>
To: "'full-disclosure@...ts.grok.org.uk'" <full-disclosure@...ts.grok.org.uk>,
	"'bugtraq@...urityfocus.com'" <bugtraq@...urityfocus.com>
Subject: ZDI-10-076: Apple Preview libFontParser SpecialEncoding Remote Code
 Execution Vulnerability

ZDI-10-076: Apple Preview libFontParser SpecialEncoding Remote Code Execution Vulnerability
http://www.zerodayinitiative.com/advisories/ZDI-10-076
April 14, 2010

-- CVE ID:
CVE-2010-1120

-- Affected Vendors:
Apple

-- Affected Products:
Apple Preview

-- TippingPoint(TM) IPS Customer Protection:
TippingPoint IPS customers have been protected against this
vulnerability by Digital Vaccine protection filter ID 9686. 
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 Preview. User interaction is required
in that a target must open a malicious file or visit a malicious page.

The specific flaw exists within the routine
TType1ParsingContext::SpecialEncoding() defined in libFontParser.dylib.
While parsing glyphs from a PDF document, a malformed offset greater
than 0x400 can result in a heap corruption which can be leveraged by an
attacker to execute arbitrary code under the context of the current
user.

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

http://support.apple.com/kb/HT4131

-- Disclosure Timeline:
2010-03-26 - Vulnerability reported to vendor
2010-04-14 - Coordinated public release of advisory

-- Credit:
This vulnerability was discovered by:
    * Charlie Miller

-- About the Zero Day Initiative (ZDI):
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