Use After Free in Foxit
CVE-2018-3939
An exploitable use-after-free vulnerability exists in the JavaScript engine of Foxit Software's PDF Reader, version 9.1.0.5096. 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 to open the malicious file to trigger this vulnerability. If the browser plugin extension is enabled, visiting a malicious site can also trigger the vulnerability.
Vulnerability class: Use-After-Free
EPSS: 0.023 (81.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Foxit — versions Foxit Software Foxit PDF Reader 9.1.0.5096
- Foxitsoftware Foxit_reader
- Foxitsoftware Phantompdf
- Microsoft Windows
Weakness classification (CWE)
Public proof-of-concept exploits
References
- talos-cna@cisco.com (Technical Description, Exploit, Third Party Advisory, x_refsource_MISC)
- nvd@nist.gov (Patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2018-3939?
- CVE-2018-3939 is a high-severity vulnerability in Foxit, classified under Use After Free. CVSS score: 8.8/10. Published 2018-08-01.
- How severe is CVE-2018-3939?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2018-3939 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.