A security vulnerability has been identified in Apache Kafka. It affects all releases since 2.8.0. The vulnerability allows malicious unauthenticated clients to allocate large amounts of memory on brokers. This can lead to brokers hitting OutOfMemoryException and causing denial of service. Example scenarios: - Kafka cluster without authentication: Any clients able to establish a network connection to a broker can trigger the issue. - Kafka cluster with SASL authentication: Any clients able to establish a network connection to a broker, without the need for valid SASL credentials, can trigger the issue. - Kafka cluster with TLS authentication: Only clients able to successfully authenticate via TLS can trigger the issue. We advise the users to upgrade the Kafka installations to one of the 3.2.3, 3.1.2, 3.0.2, 2.8.2 versions.
A possible security vulnerability has been identified in Apache Kafka Connect API.This requires access to a Kafka Connect worker, and the ability to create/modify connectors on it with an arbitrary Kafka client SASL JAAS configand a SASL-based security protocol, which has been possible on Kafka Connect clusters since Apache Kafka Connect 2.3.0.When configuring the connector via the Kafka Connect REST API, an authenticated operator can set the `sasl.jaas.config`property for any of the connector's Kafka clients to "com.sun.security.auth.module.JndiLoginModule", which can be done via the`producer.override.sasl.jaas.config`, `consumer.override.sasl.jaas.config`, or `admin.override.sasl.jaas.config` properties.This will allow the server to connect to the attacker's LDAP serverand deserialize the LDAP response, which the attacker can use to execute java deserialization gadget chains on the Kafka connect server.Attacker can cause unrestricted deserialization of untrusted data (or) RCE vulnerability when there are gadgets in the classpath.Since Apache Kafka 3.0.0, users are allowed to specify these properties in connector configurations for Kafka Connect clusters running with out-of-the-boxconfigurations. Before Apache Kafka 3.0.0, users may not specify these properties unless the Kafka Connect cluster has been reconfigured with a connectorclient override policy that permits them.Since Apache Kafka 3.4.0, we have added a system property ("-Dorg.apache.kafka.disallowed.login.modules") to disable the problematic login modules usagein SASL JAAS configuration. Also by default "com.sun.security.auth.module.JndiLoginModule" is disabled in Apache Kafka Connect 3.4.0. We advise the Kafka Connect users to validate connector configurations and only allow trusted JNDI configurations. Also examine connector dependencies for vulnerable versions and either upgrade their connectors, upgrading that specific dependency, or removing the connectors as options for remediation. Finally,in addition to leveraging the "org.apache.kafka.disallowed.login.modules" system property, Kafka Connect users can also implement their own connectorclient config override policy, which can be used to control which Kafka client properties can be overridden directly in a connector config and which cannot.
Mend Note: After conducting a further research, Mend has assigned this CVE a score of CVSS 3.1 of 6.6.
Library home page: https://kafka.apache.org
Path to dependency file: /microprofile/reactive-messaging-smallrye/kafka/pom.xml
Path to vulnerable library: /home/wss-scanner/.m2/repository/org/apache/kafka/kafka-clients/2.8.1/kafka-clients-2.8.1.jar
Vulnerabilities
**In some cases, Remediation PR cannot be created automatically for a vulnerability despite the availability of remediation
Details
CVE-2022-34917
### Vulnerable Library - kafka-clients-2.8.1.jarLibrary home page: https://kafka.apache.org
Path to dependency file: /microprofile/reactive-messaging-smallrye/kafka/pom.xml
Path to vulnerable library: /home/wss-scanner/.m2/repository/org/apache/kafka/kafka-clients/2.8.1/kafka-clients-2.8.1.jar
Dependency Hierarchy: - :x: **kafka-clients-2.8.1.jar** (Vulnerable Library)
Found in base branch: main
### Vulnerability DetailsA security vulnerability has been identified in Apache Kafka. It affects all releases since 2.8.0. The vulnerability allows malicious unauthenticated clients to allocate large amounts of memory on brokers. This can lead to brokers hitting OutOfMemoryException and causing denial of service. Example scenarios: - Kafka cluster without authentication: Any clients able to establish a network connection to a broker can trigger the issue. - Kafka cluster with SASL authentication: Any clients able to establish a network connection to a broker, without the need for valid SASL credentials, can trigger the issue. - Kafka cluster with TLS authentication: Only clients able to successfully authenticate via TLS can trigger the issue. We advise the users to upgrade the Kafka installations to one of the 3.2.3, 3.1.2, 3.0.2, 2.8.2 versions.
Publish Date: 2022-09-20
URL: CVE-2022-34917
### CVSS 3 Score Details (7.5)Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: None - Integrity Impact: None - Availability Impact: High
For more information on CVSS3 Scores, click here. ### Suggested FixType: Upgrade version
Origin: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-34917
Release Date: 2022-09-20
Fix Resolution: 2.8.2
:rescue_worker_helmet: Automatic Remediation will be attempted for this issue.
CVE-2023-25194
### Vulnerable Library - kafka-clients-2.8.1.jarLibrary home page: https://kafka.apache.org
Path to dependency file: /microprofile/reactive-messaging-smallrye/kafka/pom.xml
Path to vulnerable library: /home/wss-scanner/.m2/repository/org/apache/kafka/kafka-clients/2.8.1/kafka-clients-2.8.1.jar
Dependency Hierarchy: - :x: **kafka-clients-2.8.1.jar** (Vulnerable Library)
Found in base branch: main
### Vulnerability DetailsA possible security vulnerability has been identified in Apache Kafka Connect API.This requires access to a Kafka Connect worker, and the ability to create/modify connectors on it with an arbitrary Kafka client SASL JAAS configand a SASL-based security protocol, which has been possible on Kafka Connect clusters since Apache Kafka Connect 2.3.0.When configuring the connector via the Kafka Connect REST API, an authenticated operator can set the `sasl.jaas.config`property for any of the connector's Kafka clients to "com.sun.security.auth.module.JndiLoginModule", which can be done via the`producer.override.sasl.jaas.config`, `consumer.override.sasl.jaas.config`, or `admin.override.sasl.jaas.config` properties.This will allow the server to connect to the attacker's LDAP serverand deserialize the LDAP response, which the attacker can use to execute java deserialization gadget chains on the Kafka connect server.Attacker can cause unrestricted deserialization of untrusted data (or) RCE vulnerability when there are gadgets in the classpath.Since Apache Kafka 3.0.0, users are allowed to specify these properties in connector configurations for Kafka Connect clusters running with out-of-the-boxconfigurations. Before Apache Kafka 3.0.0, users may not specify these properties unless the Kafka Connect cluster has been reconfigured with a connectorclient override policy that permits them.Since Apache Kafka 3.4.0, we have added a system property ("-Dorg.apache.kafka.disallowed.login.modules") to disable the problematic login modules usagein SASL JAAS configuration. Also by default "com.sun.security.auth.module.JndiLoginModule" is disabled in Apache Kafka Connect 3.4.0. We advise the Kafka Connect users to validate connector configurations and only allow trusted JNDI configurations. Also examine connector dependencies for vulnerable versions and either upgrade their connectors, upgrading that specific dependency, or removing the connectors as options for remediation. Finally,in addition to leveraging the "org.apache.kafka.disallowed.login.modules" system property, Kafka Connect users can also implement their own connectorclient config override policy, which can be used to control which Kafka client properties can be overridden directly in a connector config and which cannot. Mend Note: After conducting a further research, Mend has assigned this CVE a score of CVSS 3.1 of 6.6.
Publish Date: 2023-02-07
URL: CVE-2023-25194
### CVSS 3 Score Details (6.6)Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: High - Privileges Required: High - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: High - Integrity Impact: High - Availability Impact: High
For more information on CVSS3 Scores, click here. ### Suggested FixType: Upgrade version
Origin: https://kafka.apache.org/cve-list
Release Date: 2023-02-07
Fix Resolution: 3.4.0
:rescue_worker_helmet: Automatic Remediation will be attempted for this issue.:rescue_worker_helmet:Automatic Remediation will be attempted for this issue.