Advisory Details

February 23rd, 2018

Adobe Acrobat Pro DC ImageConversion EMF EMR_STRETCHDIBITS cySrc Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability

ZDI-18-177
ZDI-CAN-5227

CVE ID CVE-2017-16397
CVSS SCORE 6.8, AV:N/AC:M/Au:N/C:P/I:P/A:P
AFFECTED VENDORS Adobe
AFFECTED PRODUCTS Acrobat Pro DC
VULNERABILITY DETAILS


This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Adobe Acrobat Pro 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 parsing of EMR_STRETCHDIBITS structures within EMF files. When parsing the cySrc, the process does not properly validate the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute code under the context of the current 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/apsb17-36.html
DISCLOSURE TIMELINE
  • 2017-10-26 - Vulnerability reported to vendor
  • 2018-02-23 - Coordinated public release of advisory
  • 2018-02-23 - Advisory Updated
CREDIT Ke Liu of Tencent's Xuanwu LAB
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