SRC-2017-0008 : Adobe Reader DC execMenuItem Off-by-One Heap Buffer Overflow Remote Code Execution Vulnerability

CVE ID:

CVE-2017-11220

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 execute arbitrary code on vulnerable installations of Adobe 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 when calling the execMenuItem function. The issue results from the lack of proper validation of a heap buffer allowing an attacker to trigger an off-by-one heap overflow. On some platforms, an attacker can leverage this vulnerability to execute code under the context of the current process.

Vendor Response:

Adobe has issued an update to correct these vulnerabilities. More details can be found at:
https://helpx.adobe.com/security/products/acrobat/apsb17-24.html

Disclosure Timeline:

• 2017-03-16 – Verified and acquired by Beyond Security
• 2017-08-08 – Coordinated public release of advisory

Credit:

This vulnerability was discovered by Steven Seeley of Source Incite

Acknowledgments:

Source Incite would like to acknowledge Beyond Security’s SSD program for the help with co-ordination of this vulnerability. More details can be found on their blog at https://blogs.securiteam.com/index.php/archives/3275.