Advisory Details

July 14th, 2015

Adobe Acrobat Reader ANStartApproval Javascript API Restrictions Bypass Vulnerability

CVE ID	CVE-2015-4435
CVSS SCORE	6.8, AV:N/AC:M/Au:N/C:P/I:P/A:P
AFFECTED VENDORS	Adobe
AFFECTED PRODUCTS	Reader DC
VULNERABILITY DETAILS	This vulnerability allows remote attackers to bypass API restrictions on vulnerable installations of Adobe Reader. 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 the ANStartApproval method. By creating a specially crafted PDF with specific Javascript instructions, it is possible to bypass the Javascript API restrictions. A remote attacker could exploit this vulnerability to execute arbitrary code.
ADDITIONAL DETAILS	Adobe has issued an update to correct this vulnerability. More details can be found at: https://helpx.adobe.com/security/products/reader/apsb15-15.html
DISCLOSURE TIMELINE	2015-06-01 - Vulnerability reported to vendor 2015-07-14 - Coordinated public release of advisory
CREDIT	kernelsmith - HP Zero Day Initiative

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