CVE-2018-3924 Use after free in Foxit

What is CVE-2018-3924?

CVE-2018-3924 is a high-severity use after free vulnerability in Foxitsoftware Foxit Reader, published on 1 Aug 2018. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

An exploitable use-after-free vulnerability exists in the JavaScript engine of Foxit Software's Foxit PDF Reader version 9.1.5096. A specially crafted PDF document can trigger a previously freed object in memory to be reused, resulting in arbitrary code execution. An attacker needs to trick the user into opening the malicious file to trigger this vulnerability. If the browser plugin extension is enabled, visiting a malicious site can also trigger the vulnerability.

Weakness: CWE-416

Which versions are affected by CVE-2018-3924?

It affects 2 products.

Products include Foxitsoftware Foxit Reader, Foxitsoftware Phantompdf.

How do I fix CVE-2018-3924?

No fix has been published for CVE-2018-3924 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2018-3924 being exploited?

There is no known exploitation of CVE-2018-3924 in the wild and no public exploit code.

Other vulnerabilities in Foxitsoftware Foxit Reader

• CVE-2021-33793 Memory corruption in n/a Critical 9.8
• CVE-2021-38568 Memory corruption in n/a Critical 9.8
• CVE-2021-38572 Path traversal in n/a Critical 9.8
• CVE-2021-38573 Path traversal in n/a Critical 9.8
• CVE-2021-38574 SQL injection in n/a Critical 9.8

All Foxitsoftware Foxit Reader vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-gqjx-6w9v-wr78.