CVE-2020-37211 in Nsauditor SpotIM
Summary
by MITRE • 02/11/2026
SpotIM 2.2 contains a denial of service vulnerability that allows attackers to crash the application by inputting a large buffer in the registration name field. Attackers can generate a 1000-character payload and paste it into the 'Name' field to trigger an application crash.
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Analysis
by VulDB Data Team • 02/11/2026
The vulnerability identified as CVE-2020-37211 affects SpotIM version 2.2 and represents a classic buffer overflow condition that manifests as a denial of service attack. This flaw specifically targets the application's registration name field processing mechanism, where insufficient input validation allows malicious actors to exploit memory handling limitations within the software architecture. The vulnerability operates through a straightforward yet effective attack vector that demonstrates poor boundary checking and memory management practices in the application's user input processing pipeline.
The technical implementation of this vulnerability stems from inadequate input sanitization and buffer size enforcement within the registration form handling code. When an attacker submits a 1000-character payload through the Name field, the application fails to properly validate or truncate the input before processing it through internal memory buffers. This condition creates a scenario where the application's memory allocation routines cannot accommodate the excessive input length, leading to stack corruption or heap overflow conditions that ultimately result in application termination. The vulnerability aligns with CWE-121, which categorizes buffer overflow conditions occurring in stack-based buffers, and CWE-122, which addresses heap-based buffer overflows, both of which fall under the broader category of memory safety issues in software development practices.
The operational impact of this vulnerability extends beyond simple application disruption to potentially enable more sophisticated attack scenarios within a broader threat landscape. While the immediate effect is a denial of service condition that prevents legitimate users from registering or accessing the service, the vulnerability could serve as a stepping stone for attackers seeking to establish persistent access or escalate privileges within the affected system. The attack requires minimal technical expertise and can be executed through simple copy-paste operations, making it particularly dangerous in environments where automated attack tools or script kiddies might leverage the flaw. This vulnerability directly maps to ATT&CK technique T1499.004, which covers network denial of service attacks, and potentially to T1071.004 for application layer protocol manipulation.
Mitigation strategies for CVE-2020-37211 should focus on implementing robust input validation and boundary checking mechanisms within the application's registration processing code. The most effective immediate solution involves implementing strict character length limits for the Name field, typically restricting input to reasonable lengths such as 255 characters or fewer, depending on the application's legitimate use cases. Additionally, developers should implement proper buffer management techniques including dynamic memory allocation with appropriate bounds checking, input sanitization routines, and exception handling for malformed inputs. The application should also incorporate defensive programming practices such as stack canaries, address space layout randomization, and input length validation before any processing occurs. Organizations should also consider implementing rate limiting and monitoring mechanisms to detect and prevent abuse of this vulnerability through automated attack patterns while maintaining visibility into potential exploitation attempts through log analysis and intrusion detection systems.