TippingPoint Zero Day Initiative
 

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

ZDI-17-281: April 11th, 2017

CVE ID

CVSS Score

Affected Vendors

Affected Products

TippingPoint™ IPS Customer Protection

TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID 27520. For further product information on the TippingPoint IPS:

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.

Vendor Response

Adobe has issued an update to correct this vulnerability. More details can be found at:

Disclosure Timeline

    2017-03-19 - Vulnerability reported to vendor
    2017-04-11 - Coordinated public release of advisory

Credit

This vulnerability was discovered by:
    Tencent Security - Team Sniper (Keen Lab and PC Mgr)