CVE-2022-0573: JFrog Artifactory RCE Vulnerability

CVE-2022-0573 Overview

CVE-2022-0573 is an Insecure Deserialization vulnerability affecting JFrog Artifactory versions before 7.36.1 and 6.23.41. The vulnerability allows a low-privileged authenticated user to send a specially crafted request containing a malicious serialized object, which the application processes without sufficient validation. Successful exploitation can lead to Denial of Service (DoS), Privilege Escalation, and Remote Code Execution on the affected Artifactory server.

Critical Impact

This vulnerability allows authenticated attackers to achieve Remote Code Execution, Privilege Escalation, or Denial of Service through insecure deserialization of untrusted data in JFrog Artifactory.

Affected Products

• JFrog Artifactory versions prior to 7.36.1
• JFrog Artifactory versions prior to 6.23.41
• JFrog Artifactory versions 7.35.0 and 7.36.0

Discovery Timeline

• 2022-05-16 - CVE-2022-0573 published to NVD
• 2024-11-21 - Last updated in NVD database

Technical Details for CVE-2022-0573

Vulnerability Analysis

This vulnerability stems from improper handling of serialized data within JFrog Artifactory. The application accepts user-provided serialized objects and deserializes them without adequate validation, which is a classic manifestation of CWE-502 (Deserialization of Untrusted Data). When the Artifactory server receives a crafted serialized payload, it processes the malicious object, potentially allowing an attacker to manipulate application behavior, execute arbitrary code, or crash the service.

The attack requires only low-privileged authentication, significantly lowering the barrier for exploitation. Since Artifactory is commonly deployed as a critical component in DevOps pipelines and CI/CD infrastructure, successful exploitation could compromise software supply chain integrity and provide attackers with lateral movement opportunities within enterprise environments.

Root Cause

The root cause of CVE-2022-0573 is insufficient validation of user-provided serialized objects before deserialization. JFrog Artifactory fails to properly sanitize or restrict the types of objects that can be deserialized from incoming requests. This allows attackers to inject malicious serialized payloads that, when processed by the Java deserialization mechanism, can instantiate arbitrary classes and execute attacker-controlled code.

Attack Vector

The attack vector is network-based and requires low-privileged authentication to the Artifactory instance. An attacker with valid credentials can craft a malicious serialized Java object and submit it through an API endpoint or other input mechanism that processes serialized data. Upon deserialization, the malicious payload executes, potentially achieving:

• Remote Code Execution: Arbitrary code runs in the context of the Artifactory server process
• Privilege Escalation: Attacker gains elevated privileges within the application or underlying system
• Denial of Service: The server becomes unresponsive or crashes due to resource exhaustion or malformed data processing

The vulnerability is exploitable without user interaction once the attacker has authenticated to the system. Due to the nature of insecure deserialization attacks in Java environments, exploitation typically leverages known gadget chains present in libraries on the application's classpath.

Detection Methods for CVE-2022-0573

Indicators of Compromise

• Unusual serialized Java object payloads in HTTP request bodies or parameters targeting Artifactory endpoints
• Unexpected process execution or child processes spawned by the Artifactory Java process
• Anomalous network connections originating from the Artifactory server to external hosts
• Error logs containing deserialization exceptions or class loading failures for unexpected classes

Detection Strategies

• Monitor Artifactory access logs for requests with abnormally large payloads or unusual content types that may contain serialized objects
• Implement network intrusion detection rules to identify known Java deserialization gadget chain signatures in traffic
• Deploy endpoint detection and response (EDR) solutions to detect suspicious process behavior from Artifactory instances
• Analyze Java runtime logs for class instantiation of known gadget chain classes (e.g., Commons Collections, Spring framework gadgets)

Monitoring Recommendations

• Enable detailed access logging on JFrog Artifactory and forward logs to a SIEM for correlation analysis
• Configure alerting for authentication anomalies followed by unusual API activity patterns
• Monitor system resource utilization on Artifactory servers for signs of DoS or cryptominer deployment
• Implement file integrity monitoring on Artifactory installation directories to detect unauthorized modifications

How to Mitigate CVE-2022-0573

Immediate Actions Required

• Upgrade JFrog Artifactory to version 7.36.1 or later (for 7.x branch) or 6.23.41 or later (for 6.x branch)
• Review access controls and remove unnecessary user accounts, particularly those with elevated privileges
• Implement network segmentation to limit exposure of Artifactory instances to trusted networks only
• Enable additional authentication controls such as multi-factor authentication where supported

Patch Information

JFrog has released patched versions to address this vulnerability. Organizations should upgrade to JFrog Artifactory version 7.36.1 or later for the 7.x release branch, or version 6.23.41 or later for the 6.x release branch. Detailed patch information and upgrade instructions are available in the JFrog CVE-2022-0573 Advisory. Additional security advisories can be found on the JFrog Security Advisories Page.

Workarounds

• Restrict network access to Artifactory instances using firewall rules to allow only trusted IP ranges
• Implement a Web Application Firewall (WAF) with rules to inspect and block suspicious serialized payloads
• Review and minimize user permissions to reduce the potential impact of compromised low-privileged accounts
• Consider placing Artifactory behind a reverse proxy with additional request filtering capabilities

# Example: Restrict Artifactory access to trusted networks using iptables
iptables -A INPUT -p tcp --dport 8081 -s 10.0.0.0/8 -j ACCEPT
iptables -A INPUT -p tcp --dport 8081 -j DROP