CVE-2022-29943 in TPS-5189
Summary
by MITRE • 05/04/2022
Talend Administration Center has a vulnerability that allows an authenticated user to use XML External Entity (XXE) processing to achieve read access as root on the remote filesystem. The issue is fixed for versions 8.0.x in TPS-5189, versions 7.3.x in TPS-5175, and versions 7.2.x in TPS-5201. Earlier versions of Talend Administration Center may also be impacted; users are encouraged to update to a supported version.
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Analysis
by VulDB Data Team • 05/07/2022
The vulnerability identified as CVE-2022-29943 represents a critical XML External Entity processing flaw within Talend Administration Center that enables authenticated users to escalate privileges and gain root-level file system access on remote systems. This vulnerability falls under the CWE-611 category of Improper Restriction of XML External Entity Reference, which is a well-documented weakness that has been exploited in numerous high-profile security incidents. The flaw specifically affects the XML parsing functionality within the administration center's processing mechanisms, allowing maliciously crafted XML input to trigger unintended file system operations.
The technical implementation of this vulnerability exploits the lack of proper XML entity validation within the Talend Administration Center's input processing pipeline. When an authenticated user submits specially crafted XML data, the system fails to properly sanitize external entity references, enabling the XML parser to resolve external entities that can access local file system resources. This processing chain ultimately allows the attacker to read files with root privileges, effectively bypassing normal access controls and escalating their privileges to the highest system level. The vulnerability is particularly concerning because it requires only authentication, making it accessible to users with legitimate administrative credentials who may not be properly vetted or monitored.
From an operational impact perspective, this vulnerability creates a severe risk for organizations relying on Talend Administration Center for data integration and management tasks. The ability to read files as root provides attackers with unrestricted access to sensitive system information, configuration files, database credentials, and potentially the entire system filesystem. This could lead to complete system compromise, data exfiltration, and persistence mechanisms being established. The vulnerability also impacts compliance requirements, as it could expose sensitive data that organizations are required to protect under various regulatory frameworks such as gdpr, hipaa, and pci dss standards.
Organizations should immediately implement mitigation strategies including updating to the patched versions mentioned in the advisory, specifically versions 8.0.x with TPS-5189, 7.3.x with TPS-5175, and 7.2.x with TPS-5201. The recommended remediation approach involves not only applying the official patches but also implementing network segmentation to limit access to the administration center, enforcing strict access controls, and monitoring for unusual XML processing activities. Security teams should also consider implementing web application firewalls to detect and block malicious XML payloads, as well as conducting comprehensive security assessments to identify any potential exploitation attempts. The vulnerability aligns with ATT&CK technique T1566.001 for Initial Access through Valid Accounts, and T1078.004 for Valid Accounts - Cloud Accounts, emphasizing the need for proper credential management and access controls. Organizations should also review their incident response procedures to ensure readiness for potential exploitation of this type of privilege escalation vulnerability.