CVE-2022-24280 in Pulsar
Summary
by MITRE • 09/23/2022
Improper Input Validation vulnerability in Proxy component of Apache Pulsar allows an attacker to make TCP/IP connection attempts that originate from the Pulsar Proxy's IP address. When the Apache Pulsar Proxy component is used, it is possible to attempt to open TCP/IP connections to any IP address and port that the Pulsar Proxy can connect to. An attacker could use this as a way for DoS attacks that originate from the Pulsar Proxy's IP address. It hasn’t been detected that the Pulsar Proxy authentication can be bypassed. The attacker will have to have a valid token to a properly secured Pulsar Proxy. This issue affects Apache Pulsar Proxy versions 2.7.0 to 2.7.4; 2.8.0 to 2.8.2; 2.9.0 to 2.9.1; 2.6.4 and earlier.
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Analysis
by VulDB Data Team • 05/22/2025
The CVE-2022-24280 vulnerability represents a critical improper input validation flaw within the Apache Pulsar Proxy component that fundamentally compromises network security controls. This vulnerability exists in the proxy's handling of client requests and allows malicious actors to exploit the system's TCP/IP connection mechanisms in ways that were never intended. The flaw specifically affects the proxy's ability to properly validate and sanitize incoming connection requests, creating a pathway for attackers to initiate outbound network connections from the proxy's own IP address. This issue manifests as a significant operational risk because it enables attackers to leverage the legitimate proxy infrastructure to conduct network reconnaissance and denial-of-service attacks without requiring direct access to the underlying network infrastructure. The vulnerability is particularly concerning because it operates at the network layer, bypassing traditional application-level security controls that would normally prevent such unauthorized connection attempts.
The technical implementation of this vulnerability stems from insufficient validation of user-supplied input parameters within the proxy's connection handling logic. When legitimate clients make requests through the Pulsar Proxy, the system fails to properly validate the target addresses and ports specified in these requests, allowing crafted inputs to be interpreted as valid connection parameters. This flaw enables what security researchers classify as a form of network tunneling or proxy abuse, where the attacker's malicious requests are processed through the legitimate proxy infrastructure. The vulnerability affects multiple version ranges including 2.7.0-2.7.4, 2.8.0-2.8.2, 2.9.0-2.9.1, and 2.6.4 and earlier, indicating a widespread exposure across the Apache Pulsar ecosystem. From a cybersecurity perspective, this vulnerability maps to CWE-20, which specifically addresses improper input validation, and represents a classic case of a privilege escalation vector that can be exploited to gain unauthorized network access. The issue is particularly dangerous because it operates at the network protocol level rather than application logic, making it difficult to detect through traditional application security controls and potentially allowing for lateral movement within network environments.
The operational impact of CVE-2022-24280 extends far beyond simple network disruption, creating opportunities for sophisticated attack vectors that align with multiple ATT&CK framework techniques including T1071.004 for application layer protocol usage and T1498 for network denial of service. Attackers can leverage this vulnerability to conduct distributed denial-of-service attacks by making the proxy appear as the source of malicious traffic, potentially overwhelming target systems and making attribution difficult. The vulnerability also enables reconnaissance activities where attackers can scan internal network ranges using the proxy as a pivot point, effectively bypassing network segmentation controls. Furthermore, the attack surface is amplified by the fact that this vulnerability requires only a valid authentication token to exploit, meaning that even partially compromised systems could become launching points for broader attacks. Organizations using Apache Pulsar in production environments face significant risk of being used as amplification points for larger attack campaigns, particularly in cloud environments where network traffic patterns are closely monitored for security purposes. The vulnerability's potential for abuse in botnet operations and as a tool for network reconnaissance makes it particularly attractive to advanced persistent threat actors and cybercriminal organizations.
Mitigation strategies for CVE-2022-24280 must address both immediate operational concerns and long-term architectural security improvements. Organizations should implement immediate patching of affected Apache Pulsar Proxy versions to ensure that the input validation logic is properly enforced. Network-level mitigations include implementing strict egress filtering rules that prevent the proxy from making outbound connections to unauthorized network ranges, combined with comprehensive monitoring of proxy network activity for anomalous connection patterns. From a security architecture perspective, organizations should consider implementing network segmentation controls that isolate the proxy components from critical internal systems, reducing the potential blast radius of any exploitation attempts. The vulnerability's characteristics suggest that implementing robust input validation at the proxy level, including strict parameter sanitization and connection destination verification, would provide effective defense against exploitation attempts. Additionally, organizations should enhance their monitoring capabilities to detect unusual patterns of outbound connection attempts from the proxy, particularly those that deviate from normal operational behavior. The implementation of zero-trust network principles around proxy components would further reduce the risk by ensuring that even authenticated users cannot leverage proxy functionality for unauthorized network access. Regular security assessments and penetration testing should be conducted to validate that the implemented mitigations are effective against this and similar classes of vulnerabilities.