What is the CVSS score of CVE-2020-9484?

CVE-2020-9484 has a CVSS 3.1 base score of 7.0 (High). CVSS vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 56.6%.

Is there a public PoC exploit available for CVE-2020-9484?

Yes, a public proof-of-concept exploit is available for CVE-2020-9484. Prioritise patching immediately. EPSS: 56.6%.

Is there a patch available for CVE-2020-9484?

Yes, a patch is available for CVE-2020-9484. Update the affected software to the latest version immediately.

Tomcat CVE-2020-9484

HIGH

Deserialization of Untrusted Data (CWE-502)

2020-05-20 security@apache.org

GHSA-344f-f5vg-2jfj

Apache RCE Deserialization Tomcat Debian Linux Leap Fedora Ubuntu Linux Agile Engineering Data Management Agile Plm Communications Cloud Native Core Binding Support Function Communications Cloud Native Core Policy Communications Diameter Signaling Router Communications Element Manager Communications Instant Messaging Server Communications Session Report Manager Communications Session Route Manager Database Fmw Platform Hospitality Guest Access Instantis Enterprisetrack Managed File Transfer Mysql Enterprise Monitor Retail Order Broker Siebel Apps Marketing Siebel Ui Framework Transportation Management Workload Manager Epolicy Orchestrator

7.0

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

7.0 HIGH

AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

CVE Published

May 20, 2020 - 19:15 nvd

HIGH 7.0

Blast Radius

ecosystem impact

† from your stack dependencies † transitive graph · vuln.today resolves 4-path depth

2 maven packages depend on org.apache.tomcat.embed:tomcat-embed-core (2 direct, 0 indirect)
2 maven packages depend on org.apache.tomcat:tomcat-catalina (2 direct, 0 indirect)

Ecosystem-wide dependent count for version 10.0.0-M1 and other introduced versions.

DescriptionNVD

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.

AnalysisAI

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;. Rated high severity (CVSS 7.0). This Deserialization of Untrusted Data vulnerability could allow attackers to execute arbitrary code through malicious serialized objects.

Technical ContextAI

This vulnerability is classified as Deserialization of Untrusted Data (CWE-502), which allows attackers to execute arbitrary code through malicious serialized objects. 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. Affected products include: Apache Tomcat, Debian Debian Linux, Opensuse Leap, Fedoraproject Fedora, Canonical Ubuntu Linux.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Avoid deserializing untrusted data. Use safe serialization formats (JSON). Implement integrity checks and type allowlists.