CVE-2021-4040
CVE-2021-4040 is a medium-severity vulnerability in Redhat Amq Broker with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Medium (CVSS 3.x base score 5.3)
- EPSS exploit prediction: 2% (83rd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Redhat Amq Broker
- Published:
- Last modified:
Description
A flaw was found in AMQ Broker. This issue can cause a partial interruption to the availability of AMQ Broker via an Out of memory (OOM) condition. This flaw allows an attacker to partially disrupt availability to the broker through a sustained attack of maliciously crafted messages. The highest threat from this vulnerability is system availability.
Frequently asked questions
- What is CVE-2021-4040?
- A flaw was found in AMQ Broker. This issue can cause a partial interruption to the availability of AMQ Broker via an Out of memory (OOM) condition. This flaw allows an attacker to partially disrupt availability to the broker through a sustained attack of maliciously crafted messages. The highest threat from this vulnerability is system availability.
- How severe is CVE-2021-4040?
- CVE-2021-4040 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
- Is CVE-2021-4040 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-4040?
- CVE-2021-4040 primarily affects Redhat Amq Broker. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2021-4040?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2021-4040 published?
- CVE-2021-4040 was published on 2022-08-24 and last updated on 2026-06-17.
References
- https://access.redhat.com/security/cve/CVE-2021-4040
- https://bugzilla.redhat.com/show_bug.cgi?id=2028254
- https://github.com/apache/activemq-artemis/pull/3871/commits
- https://issues.apache.org/jira/browse/ARTEMIS-3593
Affected products (2)
- cpe:2.3:a:redhat:amq_broker:*:*:*:*:*:*:*:*
- cpe:2.3:a:apache:artemis:*:*:*:*:*:*:*:*
More vulnerabilities in Redhat Amq Broker
- CVE-2022-1833 — High (CVSS 8.8): A flaw was found in AMQ Broker Operator 7.9.4 installed via UI using OperatorHub where a low-privilege user that has…
- CVE-2021-3763 — Medium (CVSS 4.3): A flaw was found in the Red Hat AMQ Broker management console in version 7.8 where an existing user is able to access…
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