CVE-2021-31456: Foxit Reader Annotation Use-After-Free Remote Code Execution Vulnerability
First published: Fri May 07 2021(Updated: )
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 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-13102.
Credit: zdi-disclosures@trendmicro.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Foxitsoftware Phantompdf | <=9.7.5.29616 | |
| Foxitsoftware Phantompdf | >=10.0.0.0<=10.1.37598 | |
| Foxitsoftware Reader | <=10.1.3.37598 | |
| Microsoft Windows |
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Reference Links
Frequently Asked Questions
What is CVE-2021-31456?
CVE-2021-31456 is a vulnerability that allows remote attackers to execute arbitrary code on affected installations of Foxit Reader 10.1.1.37576.
How does CVE-2021-31456 work?
CVE-2021-31456 is a use-after-free vulnerability that is exploited when a user visits a malicious page or opens a malicious file.
How severe is CVE-2021-31456?
CVE-2021-31456 has a severity rating of 7.8 (high).
Which software versions are affected by CVE-2021-31456?
CVE-2021-31456 affects Foxit Reader 10.1.1.37576 and some versions of Foxitsoftware Phantompdf.
How can I fix CVE-2021-31456?
To fix CVE-2021-31456, users should update to the latest version of Foxit Reader or Foxitsoftware Phantompdf.
- collector/zdi-advisory
- alias/ZDI-21-545
- alias/ZDI-CAN-13102
- alias/CVE-2021-31456
- agent/references
- agent/type
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- vendor/foxit
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- version/foxitsoftware phantompdf/10.0.0.0
- version/foxitsoftware phantompdf/10.1.37598
- canonical/foxitsoftware reader
- version/foxitsoftware reader/10.1.3.37598
- vendor/microsoft
- canonical/microsoft windows