CVE-2021-27741 in Commerce Management Center
Summary
by MITRE • 08/13/2021
" Security vulnerability in HCL Commerce Management Center allowing XML external entity (XXE) injection"
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Analysis
by VulDB Data Team • 08/18/2021
The vulnerability identified as CVE-2021-27741 represents a critical security flaw within the HCL Commerce Management Center platform that exposes the system to XML external entity injection attacks. This vulnerability specifically affects the management center component of the HCL Commerce suite, which serves as the administrative interface for configuring and managing e-commerce operations. The flaw exists in how the system processes XML data inputs, particularly when handling external entity references within XML documents. Security researchers have identified that this vulnerability could enable attackers to exploit the system's XML parser to access internal resources, potentially leading to unauthorized data access, system compromise, or further exploitation within the network environment.
The technical implementation of this XXE vulnerability stems from insufficient input validation and sanitization within the XML processing mechanisms of the HCL Commerce Management Center. When the system receives XML data containing external entity references, it fails to properly restrict or disable the resolution of external entities, allowing malicious actors to craft XML payloads that can trigger unauthorized resource access. This flaw aligns with CWE-611, which specifically addresses improper restriction of XML external entity reference, and represents a classic XXE injection attack vector. The vulnerability operates by leveraging the XML parser's default behavior of resolving external entity references, potentially enabling attackers to read local files, perform server-side request forgery attacks, or even execute remote code depending on the underlying system configuration and available resources.
The operational impact of this vulnerability extends beyond simple data exposure, as it provides attackers with potential pathways for privilege escalation and lateral movement within the affected environment. An attacker who successfully exploits this XXE vulnerability could gain access to sensitive administrative functions within the HCL Commerce Management Center, potentially compromising the entire e-commerce platform. The attack surface includes not only the direct exposure of internal system resources but also the possibility of using the management center as a foothold for accessing backend databases or other connected systems. This vulnerability particularly affects organizations that rely heavily on HCL Commerce for their e-commerce operations, as compromise of the management center could result in complete system takeover, data breaches, and significant business disruption. The impact is further amplified by the fact that the management center typically contains administrative credentials and system configuration data that could be leveraged for more extensive attacks.
Mitigation strategies for CVE-2021-27741 should focus on implementing robust XML input validation and disabling external entity resolution within the affected system. Organizations should immediately apply the vendor-provided security patches and updates to address the vulnerability, while also implementing proper XML parser configurations that disable external entity processing. Network segmentation and access controls should be reinforced to limit access to the management center to only authorized administrative personnel. Security monitoring should be enhanced to detect unusual XML processing activities or attempts to access external resources through the system. Additionally, organizations should consider implementing web application firewalls and input sanitization mechanisms to prevent malformed XML data from reaching the vulnerable components. The remediation approach should align with established security frameworks such as the OWASP Top Ten and NIST cybersecurity guidelines, particularly focusing on input validation and secure coding practices to prevent similar vulnerabilities from emerging in future system implementations.