Vulnerability · Published May 7, 2021 · Assigned by zdi

CVE-2021-31454

High 7.8

In plain English

A high-severity heap buffer overflow in Reader from Foxit. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 4.0% (higher than 91% of all known vulnerabilities).

Severity (CVSS 3.0)7.8High

Exploit odds (30 days)4.0%top 9.5% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 10.1.1.37576. 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 Decimal element. A crafted leadDigits value in a Decimal element can trigger an overflow of a fixed-length heap-based buffer. An attacker can leverage this vulnerability to execute arbitrary code in the context of the current process. Was ZDI-CAN-13095.

Affected products (as reported)

Vendor	Product	Versions
Foxit	Reader	10.1.1.37576

Weakness: CWE-122 · Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

https://www.foxitsoftware.com/support/security-bulletins.php x_refsource_MISC
https://www.zerodayinitiative.com/advisories/ZDI-21-543/ x_refsource_MISC