CVE-2021-34839: Foxit PDF Reader Annotation Use-After-Free Remote Code Execution Vulnerability
First published: Wed Aug 04 2021(Updated: )
This vulnerability allows remote attackers to execute arbitrary code 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 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.
Credit: zdi-disclosures@trendmicro.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Foxit PDF Reader | ||
| Foxit PDF Reader | <=11.0.0.49893 | |
| Foxitsoftware Pdf Editor | <=10.1.4.37651 | |
| Foxitsoftware Pdf Editor | =11.0.0.49893 | |
| Microsoft Windows |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is CVE-2021-34839?
CVE-2021-34839 is a vulnerability in Foxit PDF Reader that allows remote attackers to execute arbitrary code.
What is the severity of CVE-2021-34839?
The severity of CVE-2021-34839 is high with a CVSS score of 7.8.
How does CVE-2021-34839 vulnerability work?
CVE-2021-34839 is a use-after-free vulnerability that can be exploited by remote attackers through user interaction such as visiting a malicious page or opening a malicious file.
Which software versions are affected by CVE-2021-34839?
Foxit PDF Reader versions 11.0.0.49893 and Foxitsoftware Pdf Editor versions up to 10.1.4.37651 and 11.0.0.49893 are affected by CVE-2021-34839.
How can I mitigate the CVE-2021-34839 vulnerability?
To mitigate the CVE-2021-34839 vulnerability, it is recommended to update to the latest version of Foxit PDF Reader or apply any patches provided by the vendor.
- collector/zdi-advisory
- alias/ZDI-21-921
- alias/ZDI-CAN-14020
- alias/CVE-2021-34839
- collector/nvd-index
- agent/weakness
- agent/title
- agent/author
- agent/type
- agent/tags
- agent/event
- agent/references
- agent/severity
- agent/description
- agent/last-modified-date
- agent/softwarecombine
- agent/first-publish-date
- vendor/foxit
- canonical/foxit pdf reader
- version/foxit pdf reader/11.0.0.49893
- vendor/foxitsoftware
- canonical/foxitsoftware pdf editor
- version/foxitsoftware pdf editor/10.1.4.37651
- version/foxitsoftware pdf editor/11.0.0.49893
- vendor/microsoft
- canonical/microsoft windows