CVE-2020-37196 in Nsauditor Dnss Domain Name Search Software
Summary
by MITRE • 02/11/2026
Dnss Domain Name Search Software contains a denial of service vulnerability that allows attackers to crash the application by providing an oversized registration key. Attackers can generate a 1000-character buffer payload and paste it into the registration key field to trigger an application crash.
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Analysis
by VulDB Data Team • 06/29/2026
The vulnerability identified as CVE-2020-37196 affects Dnss Domain Name Search Software, representing a critical denial of service flaw that compromises system availability and operational integrity. This weakness manifests through improper input validation mechanisms within the software's registration key processing functionality, where the application fails to adequately sanitize or limit the length of user-provided data. The vulnerability stems from a lack of input length constraints and buffer management protocols that should normally prevent oversized data from corrupting memory structures during processing. Attackers can exploit this weakness by crafting a specifically designed 1000-character payload and submitting it through the registration key field, which triggers an unhandled exception or memory corruption that results in complete application termination.
The technical implementation of this vulnerability aligns with CWE-122, which describes buffer overflow conditions where insufficient bounds checking allows attackers to write beyond allocated memory regions. The flaw operates at the application layer where user input is directly processed without proper validation, creating a path for malicious data injection that leads to system instability. When the oversized registration key is processed, the software's internal buffer management fails to handle the excessive data length, causing memory corruption that ultimately results in application crash. This type of vulnerability represents a classic example of insufficient input validation, where the system assumes all input data will conform to expected parameters without implementing necessary safeguards.
The operational impact of CVE-2020-37196 extends beyond simple application disruption to potentially compromise business continuity and service availability for organizations relying on Dnss Domain Name Search Software. System administrators and end-users may experience unexpected service interruptions, particularly during critical operations or high-traffic periods when the software is actively processing registration requests. The vulnerability's exploitation requires minimal technical skill, making it accessible to threat actors across different skill levels and increasing the likelihood of successful attacks. Organizations may face reputational damage and operational downtime as users encounter service disruptions, while security teams must allocate resources to investigate and remediate the issue.
Mitigation strategies for this vulnerability should prioritize immediate implementation of input validation controls and buffer length restrictions within the software's registration key processing logic. Organizations should implement proper bounds checking mechanisms that limit the maximum allowable length of registration keys to prevent oversized payloads from being processed. The solution aligns with ATT&CK technique T1499.004 which addresses denial of service through resource exhaustion or memory corruption. Security patches should include comprehensive input sanitization routines that validate data length and format before processing, combined with proper error handling that prevents crash conditions from occurring. Additionally, implementing rate limiting and monitoring mechanisms can help detect and prevent exploitation attempts while providing early warning capabilities for potential abuse of this vulnerability.