CVE-2020-9484
7.0 · HIGHOverview
CVE-2020-9484 is a high-severity vulnerability affecting apache tomcat. It was published on May 20, 2020 and has a CVSS 3.1 base score of 7.0 (HIGH).
This vulnerability has a CVSS 3.1 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical Description
When using Apache Tomcat versions 10.0.0-M1 to 10.0.0-M4, 9.0.0.M1 to 9.0.34, 8.5.0 to 8.5.54 and 7.0.0 to 7.0.103 if a) an attacker is able to control the contents and name of a file on the server; and b) the server is configured to use the PersistenceManager with a FileStore; and c) the PersistenceManager is configured with sessionAttributeValueClassNameFilter="null" (the default unless a SecurityManager is used) or a sufficiently lax filter to allow the attacker provided object to be deserialized; and d) the attacker knows the relative file path from the storage location used by FileStore to the file the attacker has control over; then, using a specifically crafted request, the attacker will be able to trigger remote code execution via deserialization of the file under their control. Note that all of conditions a) to d) must be true for the attack to succeed.
Remediation
Check the references section for vendor advisories and patches from apache. Update tomcat to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| apache | tomcat | >= 7.0.0, < 7.0.108 | Affected |
| oracle | communications_diameter_signaling_router | 8.0.0.0 | Affected |
| oracle | communications_element_manager | 8.2.0 | Affected |
| oracle | communications_session_report_manager | 8.2.0 | Affected |
| oracle | communications_session_route_manager | 8.2.0 | Affected |
| oracle | instantis_enterprisetrack | 17.1 | Affected |
| oracle | mysql_enterprise_monitor | 0 | Affected |
References
Frequently Asked Questions
What is CVE-2020-9484?
CVE-2020-9484 is a high-severity vulnerability affecting apache tomcat. It was published on May 20, 2020 and has a CVSS 3.1 base score of 7.0 (HIGH).
How severe is CVE-2020-9484?
This vulnerability has a CVSS 3.1 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2020-9484?
Check the references section for vendor advisories and patches from apache. Update tomcat to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2020-9484?
CyberStrike's AI-powered security agents can automatically detect CVE-2020-9484 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
How CyberStrike Helps
AI agents map your attack surface to find vulnerabilities like this one.
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