CVE-2020-14234 in Domino
Summary
by MITRE • 11/22/2020
HCL Domino is susceptible to a Denial of Service vulnerability due to improper validation of user-supplied input, potentially giving an attacker the ability to crash the server. Versions previous to release 9.0.1 FP10 IF6 and release 10.0.1 are affected.
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Analysis
by VulDB Data Team • 12/09/2020
The vulnerability identified as CVE-2020-14234 represents a critical denial of service weakness within HCL Domino server software that stems from inadequate input validation mechanisms. This flaw exists in the server's processing of user-supplied data, creating an exploitable condition where malicious actors can craft specific inputs designed to trigger system instability. The vulnerability affects multiple versions of the Domino platform, specifically those prior to the release of 9.0.1 FP10 IF6 and 10.0.1, indicating a widespread impact across several major releases. The improper validation allows attackers to send malformed or specially crafted requests that can cause the server to crash or become unresponsive, effectively rendering the service unavailable to legitimate users.
The technical exploitation of this vulnerability occurs through the manipulation of input parameters that the Domino server processes without adequate sanitization or validation checks. When the server encounters malformed data in user requests, the insufficient validation logic fails to properly handle the unexpected input, leading to a crash condition that disrupts normal server operations. This type of vulnerability falls under the CWE-20 category of "Improper Input Validation" which is classified as a fundamental weakness in software design that enables various attack vectors including denial of service, information disclosure, and potentially more severe exploits. The vulnerability's impact is amplified by its ability to cause complete service disruption without requiring authentication or elevated privileges, making it particularly dangerous in production environments where server availability is critical.
From an operational standpoint, this vulnerability poses significant risks to organizations relying on Domino servers for email services, collaboration platforms, and business-critical applications. The denial of service condition can result in extended downtime, productivity losses, and potential revenue impacts depending on the organization's dependency on the affected services. Attackers can leverage this vulnerability to disrupt business operations without requiring sophisticated attack capabilities or deep system knowledge, as the exploit can be relatively simple to construct and execute. The vulnerability also creates opportunities for attackers to conduct persistent disruption campaigns or use it as part of broader attack strategies that may include information gathering or privilege escalation attempts. Organizations may face compliance and regulatory challenges if such disruptions occur, particularly in industries with strict availability requirements.
The recommended mitigation strategy involves immediate deployment of the vendor-provided patches and updates for versions 9.0.1 FP10 IF6 and 10.0.1, which contain the necessary fixes to address the input validation issues. System administrators should also implement network-level protections such as rate limiting and input filtering mechanisms to reduce the attack surface and provide additional defense in depth. Monitoring and logging configurations should be enhanced to detect anomalous input patterns that might indicate exploitation attempts. The vulnerability demonstrates the importance of maintaining up-to-date security patches and implementing robust input validation practices across all server applications. Organizations should also consider implementing intrusion detection systems and network segmentation to limit the potential impact of such vulnerabilities. This case highlights the critical nature of proper input validation as outlined in the OWASP Top Ten and aligns with ATT&CK technique T1499.004 for Network Denial of Service, emphasizing the need for comprehensive security measures beyond simple patch management.