This vulnerability allows remote attackers to disclose sensitive information on vulnerable installations of Foxit Reader 9.2.0.9297. 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 Lower method of a XFA object. 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 buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-6617.

References

• https://nvd.nist.gov/vuln/detail/CVE-2018-17671
• https://www.foxitsoftware.com/support/security-bulletins.php
• https://www.zerodayinitiative.com/advisories/ZDI-18-1150/