Horizon Alert
Summary of the vulnerability and why it matters
This vulnerability in Apache Camel allows for remote code execution if an attacker can send a crafted message to a JMS queue or topic that a Camel application is consuming. Because the affected component deserializes message content without proper validation, it can be tricked into running malicious code, especially if specific libraries are present. This is a serious concern for applications using Camel for message processing.
- Critical impact: Allows full system compromise.
- Broad reach: Affects multiple Apache Camel versions and related components.
- Default configuration risk: Enabled by default for JMS message handling.
Attack Path
How an attacker could exploit the issue
An attacker could exploit this by sending a specially crafted JMS ObjectMessage to a queue or topic that a vulnerable Apache Camel application is consuming. If the application is configured to process these messages using the default `mapJmsMessage` option, it will deserialize the payload without proper checks, allowing the attacker to execute arbitrary code on the Camel application's server by leveraging deserialization gadgets.
- Unauthenticated network access required.
- Target: JMS message queue/topic.
- Camel app must consume messages.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability allows for remote code execution through deserialization of untrusted JMS messages when mapJmsMessage is enabled. While the attack requires an attacker to send a crafted message to a queue or topic consumed by a Camel application, it presents a significant risk if successful. The default configuration for mapJmsMessage increases the likelihood of exploitation in vulnerable environments.
- Exploitable with crafted messages.
- No public exploits observed.
- Affects multiple Camel components.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
Prioritize patching Apache Camel services running versions from 3.0.0 to 4.14.6, 4.15.0 to 4.18.1, and 4.19.0. If patching is not immediately feasible, implement network segmentation or strict access controls to prevent unauthenticated systems from publishing messages to JMS queues or topics consumed by Camel applications. Monitor for deserialization exploitation patterns in JMS message processing.
- Upgrade to Apache Camel 4.20.0 or 4.14.7/4.18.2.
- Isolate JMS brokers from untrusted networks.
- Log and alert on deserialization errors.
