CVE-2022-33739 in CA Clarity
Summary
by MITRE • 06/17/2022
CA Clarity 15.8 and below and 15.9.0 contain an insecure XML parsing vulnerability that could allow a remote attacker to potentially view the contents of any file on the system.
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Analysis
by VulDB Data Team • 06/17/2022
The vulnerability identified as CVE-2022-33739 resides within CA Clarity versions 15.8 and below as well as 15.9.0, representing a critical insecure XML parsing flaw that exposes systems to remote exploitation. This vulnerability falls under the category of insecure deserialization and XML external entity processing issues, which are commonly classified as CWE-611 and CWE-494 respectively within the CWE database. The flaw enables malicious actors to manipulate XML parsing mechanisms and potentially access arbitrary files on the affected system through crafted XML input.
The technical implementation of this vulnerability occurs when the application processes XML data without proper validation or sanitization of external entity references. Attackers can construct malicious XML payloads that exploit the XML parser's handling of external entities, allowing them to traverse the file system and retrieve sensitive information from the server. This weakness typically manifests when the application fails to disable external entity resolution or when it improperly handles user-supplied XML content. The vulnerability is particularly dangerous because it can be exploited remotely without requiring authentication, making it an attractive target for automated attacks.
The operational impact of CVE-2022-33739 extends beyond simple information disclosure, as it can potentially lead to complete system compromise. An attacker who successfully exploits this vulnerability can access configuration files, database credentials, application source code, and other sensitive artifacts that may contain authentication tokens or cryptographic keys. The attack surface includes not only the application files but also system-level resources that could provide further access to network services, user accounts, or other critical infrastructure components. This vulnerability directly aligns with ATT&CK technique T1213.002 for Data from Information Repositories and T1566.001 for Phishing with Malicious File, as it enables unauthorized data access and can be leveraged as a stepping stone for further compromise.
Organizations affected by this vulnerability should immediately implement mitigations including disabling external entity resolution in XML parsers, implementing proper input validation for all XML content, and restricting file system access for the application process. The most effective remediation involves updating to a patched version of CA Clarity that addresses the XML parsing vulnerability, though in the interim, administrators should consider implementing network-level restrictions, web application firewalls, and comprehensive monitoring of XML processing activities. Additionally, implementing principle of least privilege for the application's file system access and conducting thorough security assessments of XML handling components can significantly reduce the attack surface and potential impact of exploitation attempts.