ZDI-08-074: Adobe Acrobat PDF Javascript getCosObj Memory Corruption Vulnerability Nov 04 2008 08:54PM
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ZDI-08-074: Adobe Acrobat PDF Javascript getCosObj Memory Corruption



November 4, 2008

-- CVE ID:


-- Affected Vendors:


-- Affected Products:

Adobe Acrobat

-- TippingPoint(TM) IPS Customer Protection:

TippingPoint IPS customers have been protected against this

vulnerability by Digital Vaccine protection filter ID 5941.

For further product information on the TippingPoint IPS, visit:


-- Vulnerability Details:

This vulnerability allows remote attackers to execute code on vulnerable

installations of Adobe Acrobat. User interaction is required in that a

user must visit a malicious web site.

The specific flaw exists when processing malicious javascript contained

in a PDF document. When creating a Collab object and performing a

specific sequence of actions on it, memory corruption occurs potentially

resulting in remote code execution. If successfully exploited full

control of the affected machine running under the credentials of the

currently logged in user can be achieved.

-- Vendor Response:

Adobe has issued an update to correct this vulnerability. More

details can be found at:


-- Disclosure Timeline:

2008-05-12 - Vulnerability reported to vendor

2008-11-04 - Coordinated public release of advisory

-- Credit:

This vulnerability was discovered by:

* Peter Vreudegnhil

-- About the Zero Day Initiative (ZDI):

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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. 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:


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