What is the CVSS score of CVE-2020-11998?

CVE-2020-11998 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 51.2%.

Is there a patch available for CVE-2020-11998?

Yes, a patch is available for CVE-2020-11998. Update the affected software to the latest version immediately.

Activemq CVE-2020-11998

CRITICAL

2020-09-10 security@apache.org

RCE Apache Java Oracle Activemq Communications Diameter Signaling Router Flexcube Private Banking Communications Element Manager Communications Session Report Manager Communications Session Route Manager Enterprise Repository

9.8

CVSS 3.1 · NVD

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Vulnerability Assessment

Impact	CVSS score of 9.8 (CRITICAL). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived	This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system.

Act Now Prioritize within 24-48h. Why: CRITICAL severity.

Patch available 51.2% exploitation probability (EPSS)

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AnalysisAI

A regression has been introduced in the commit preventing JMX re-bind. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affected Packages

maven org.apache.activemq:activemq-parent fix: 5.15.13

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in maven

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

A regression has been introduced in the commit preventing JMX re-bind. By passing an empty environment map to RMIConnectorServer, instead of the map that contains the authentication credentials, it leaves ActiveMQ open to the following attack: https://docs.oracle.com/javase/8/docs/technotes/guides/management/agent.html "A remote client could create a javax.management.loading.MLet MBean and use it to create new MBeans from arbitrary URLs, at least if there is no security manager. In other words, a rogue remote client could make your Java application execute arbitrary code." Mitigation: Upgrade to Apache ActiveMQ 5.15.13 Affected products include: Apache Activemq, Oracle Communications Diameter Signaling Router, Oracle Communications Element Manager, Oracle Communications Session Report Manager, Oracle Communications Session Route Manager.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 9.8 CRITICAL

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

DescriptionNVD

Threat Intelligence Overview

EPSS Score

51.2%

Top 1% exploitable

Data Quality

2 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity CRITICAL

CISA KEV No

Public POC No

EPSS 51.2%

Patch available Yes

Active threat No

Deciding rule

CRITICAL severity

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact· derived

Medium

Priority Score

100

Low Medium High Critical

KEV: 0

EPSS: +51

CVSS: +49

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Remote Code Execution CRITICAL

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Affected Products (CPE)NVD

cpe:2.3:a:apache:activemq:5.15.12:*:*:*:*:*:*:*

cpe:2.3:a:oracle:communications_diameter_signaling_router:*:*:*:*:*:*:*:*

cpe:2.3:a:oracle:communications_element_manager:*:*:*:*:*:*:*:*

cpe:2.3:a:oracle:communications_session_report_manager:*:*:*:*:*:*:*:*

cpe:2.3:a:oracle:communications_session_route_manager:*:*:*:*:*:*:*:*

cpe:2.3:a:oracle:enterprise_repository:11.1.1.7.0:*:*:*:*:*:*:*

cpe:2.3:a:oracle:flexcube_private_banking:12.0.0:*:*:*:*:*:*:*

cpe:2.3:a:oracle:flexcube_private_banking:12.1.0:*:*:*:*:*:*:*

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References

Advisories & patches

PATCH https://www.oracle.com//security-alerts/cpujul2021.html PATCH https://www.oracle.com/security-alerts/cpuApr2021.html PATCH https://www.oracle.com/security-alerts/cpuoct2021.html ADVISORY http://activemq.apache.org/security-advisories.data/CVE-2020-11998-announcement.txt REF https://lists.apache.org/thread.html/r946488fb942fd35c6a6e0359f52504a558ed438574a8f14d36d7dcd7%40%3Ccommits.activemq.apache.org%3E REF https://lists.apache.org/thread.html/rb2fd3bf2dce042e0ab3f3c94c4767c96bb2e7e6737624d63162df36d%40%3Ccommits.activemq.apache.org%3E REF https://www.oracle.com/security-alerts/cpujan2021.html

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