Use After Free in Foxit Reader
CVE-2018-9956
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Foxit Reader 9.0.1.1049. 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 XFA Button elements. When setting the title attribute, the process does not properly validate the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code under the context of the current process. Was ZDI-CAN-5617.
Vulnerability class: Use-After-Free
EPSS: 0.027 (84.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Foxit Reader — versions 9.0.1.1049
- Foxitsoftware Foxit_reader
- Foxitsoftware Phantompdf
Weakness classification (CWE)
References
- zdi-disclosures@trendmicro.com (x_refsource_CONFIRM, Patch, Vendor Advisory)
- zdi-disclosures@trendmicro.com (VDB Entry, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2018-9956?
- CVE-2018-9956 is a high-severity vulnerability in Foxit Reader, classified under Use After Free. CVSS score: 8.8/10. Published 2018-05-17.
- How severe is CVE-2018-9956?
- High severity. CVSS v3 base score is 8.8 out of 10.