Advisory Details

August 1st, 2017

(Pwn2Own) Adobe Reader DC util streamFromString Uninitialized Memory Information Disclosure Vulnerability

CVE ID	CVE-2017-3056
CVSS SCORE	4.3, AV:N/AC:M/Au:N/C:P/I:N/A:N
AFFECTED VENDORS	Adobe
AFFECTED PRODUCTS	Acrobat Reader DC
VULNERABILITY DETAILS	This vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Adobe Acrobat Reader DC. 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 handling of the util.streamFromString method. The issue results from the lack of proper initialization of memory prior to accessing it. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the process.
ADDITIONAL DETAILS	Adobe has issued an update to correct this vulnerability. More details can be found at: https://helpx.adobe.com/security/products/acrobat/apsb17-11.html
DISCLOSURE TIMELINE	2017-03-19 - Vulnerability reported to vendor 2017-08-01 - Coordinated public release of advisory
CREDIT	willj from Tencent PC Manager

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