Advisory Details

August 1st, 2017

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

ZDI-17-281
ZDI-CAN-4588

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
TREND MICRO CUSTOMER PROTECTION Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 27520. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
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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