Vulnerability · Published Aug 4, 2021 · Assigned by zdi
CVE-2021-34837
High 7.8
In plain English
A high-severity use-after-free in PDF 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).
Official description
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Foxit PDF Reader 11.0.0.49893. 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 Annotation objects. 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 vulnerability to execute code in the context of the current process. Was ZDI-CAN-14018.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Foxit | PDF Reader | 11.0.0.49893 |
Weakness: CWE-416 · Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
References
- https://www.foxit.com/support/security-bulletins.html x_refsource_MISC
- https://www.zerodayinitiative.com/advisories/ZDI-21-919/ x_refsource_MISC