CVE-2023-20852 in a+HRD
Summary
by MITRE • 04/27/2023
aEnrich Technology a+HRD has a vulnerability of Deserialization of Untrusted Data within its MSMQ interpreter. An unauthenticated remote attacker can exploit this vulnerability to execute arbitrary system commands to perform arbitrary system operation or disrupt service.
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Analysis
by VulDB Data Team • 09/01/2025
The vulnerability identified as CVE-2023-20852 resides within aEnrich Technology's a+HRD platform, specifically within its Message Queuing (MSMQ) interpreter component. This represents a critical security flaw that falls under the category of deserialization of untrusted data, a well-documented weakness that has been extensively catalogued in the Common Weakness Enumeration database as CWE-502. The vulnerability exists in the way the system processes incoming messages through the MSMQ interface, where it fails to properly validate or sanitize data received from external sources.
The technical implementation of this flaw allows an unauthenticated remote attacker to craft malicious payloads that, when processed by the MSMQ interpreter, trigger unintended code execution. This occurs because the system deserializes data without adequate validation mechanisms, enabling attackers to inject malicious code that gets executed within the context of the running service. The vulnerability's remote exploitability means that attackers do not require any prior authentication credentials to leverage this weakness, making it particularly dangerous in networked environments where the system may be exposed to external traffic.
From an operational impact perspective, this vulnerability provides attackers with the capability to execute arbitrary system commands, which can lead to complete system compromise. The potential attack surface includes unauthorized access to sensitive data, system disruption through service degradation or termination, and the possibility of establishing persistent access within the network. The ability to perform arbitrary system operations means that an attacker could potentially escalate privileges, install malware, or use the compromised system as a pivot point for further attacks against other networked systems. This vulnerability directly aligns with several techniques documented in the MITRE ATT&CK framework under the execution and privilege escalation domains.
Mitigation strategies for CVE-2023-20852 should focus on immediate patching of the affected aEnrich Technology a+HRD platform, as this represents the most effective solution to address the root cause of the vulnerability. Organizations should also implement network segmentation to limit access to the MSMQ interpreter, particularly if the system must remain operational while awaiting patches. Additional defensive measures include implementing strict input validation for all message processing components, deploying intrusion detection systems to monitor for suspicious message patterns, and establishing network-level firewalls to restrict access to the MSMQ ports. Security teams should also conduct thorough network scans to identify any potential exploitation attempts and maintain continuous monitoring for unusual system behavior that might indicate successful exploitation of this vulnerability.