Foxit PDF Reader AFSpecial_KeystrokeEx Use-After-Free Information Disclosure Vulnerability
Vulnerability Details
This vulnerability allows remote attackers to disclose sensitive information on affected installations of Foxit PDF Reader. 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 AFSpecial_KeystrokeEx method. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process.
Additional Details
Foxit has issued an update to correct this vulnerability. More details can be found at:
https://www.foxit.com/support/security-bulletins.html
Disclosure Timeline
- 2022-04-27 - Vulnerability reported to vendor
- 2022-08-05 - Coordinated public release of advisory
Credit
Suyue Guo and Wei You from Renmin University of China
