CVE-2021-34970: 
Foxit PDF Reader vulnerability analysis and mitigation

CVE-2021-34970 is a format string vulnerability discovered in Foxit PDF Reader's print method. The vulnerability was disclosed on October 15, 2021, affecting Foxit PDF Reader installations. This vulnerability allows remote attackers to disclose sensitive information through improper validation of user-supplied strings used as format specifiers (ZDI Advisory).

The vulnerability exists within the implementation of the print method in Foxit PDF Reader. The specific flaw stems from the lack of proper validation of user-supplied strings before using them as format specifiers. The vulnerability has been assigned a CVSS score of 3.3 (AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N), indicating a low severity level (ZDI Advisory).

When successfully exploited, this vulnerability allows attackers to disclose sensitive information on affected installations of Foxit PDF Reader. The vulnerability requires user interaction, specifically requiring the target to visit a malicious page or open a malicious file. An attacker can potentially leverage this vulnerability in conjunction with other vulnerabilities to execute arbitrary code in the context of the current process (ZDI Advisory).

The vulnerability requires user interaction for successful exploitation. An attacker would need to convince a user to visit a malicious page or open a malicious file. The local attack vector and requirement for user interaction somewhat limit the exploitability of this vulnerability (ZDI Advisory).

Foxit has released an update to correct this vulnerability. Users are advised to update their Foxit PDF Reader installations to the latest version available through the vendor's security bulletins page (ZDI Advisory).