Adobe Acrobat ImageConversion EMF EMR_ALPHABLEND Out-Of-Bounds Read Information Disclosure Vulnerability
Vulnerability Details
This vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Adobe Acrobat. 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_ALPHABLEND records in EMF files. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated data structure. An attacker can leverage this in conjunction with other vulnerabilities to execute code in 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/apsb18-30.html
Disclosure Timeline
- 2018-07-27 - Vulnerability reported to vendor
- 2018-10-11 - Coordinated public release of advisory
Credit
Ron Waisberg
