CVE-2002-0496 in Talker Server
Summary
by MITRE
The HTTP server for SouthWest Talker server 1.0.0 allows remote attackers to cause a denial of service (server crash) via a malformed URL to port 5002.
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Analysis
by VulDB Data Team • 06/19/2024
The vulnerability described in CVE-2002-0496 represents a classic denial of service flaw affecting the SouthWest Talker server version 1.0.0. This particular implementation of an HTTP server demonstrates a critical weakness in input validation and error handling mechanisms that can be exploited by remote attackers to disrupt service availability. The vulnerability specifically targets the server's handling of malformed URL requests directed at port 5002, which serves as the primary communication endpoint for the application. The flaw occurs when the server processes malformed URL content without proper sanitization or bounds checking, leading to unpredictable behavior that ultimately results in system instability and complete service termination.
From a technical perspective, this vulnerability aligns with CWE-129, which addresses improper validation of input boundaries, and CWE-400, which covers resource exhaustion issues. The attack vector exploits the server's failure to properly validate URL parameters, allowing attackers to craft malicious requests that trigger buffer overflows or memory corruption conditions. When the malformed URL reaches port 5002, the HTTP server's parsing logic encounters unexpected data structures that cause the application to crash or enter an unrecoverable state. The vulnerability demonstrates poor defensive programming practices where the server does not implement adequate exception handling or input sanitization routines that would normally protect against malformed data processing. This type of flaw typically arises from insufficient validation of user-supplied data before processing, creating opportunities for attackers to manipulate the application's execution flow through carefully crafted input sequences.
The operational impact of this vulnerability extends beyond simple service disruption, as it can be leveraged for systematic denial of service attacks that compromise the availability of critical communication services. Organizations relying on the SouthWest Talker server for network communications face significant risks when this vulnerability remains unpatched, as attackers can repeatedly exploit the flaw to maintain service outages. The attack requires minimal technical expertise to execute, making it particularly dangerous as it can be exploited by threat actors with basic networking knowledge. The server crash resulting from this vulnerability eliminates any possibility of graceful degradation or failover mechanisms, leading to complete service interruption. This type of vulnerability also creates opportunities for attackers to perform reconnaissance activities by observing system behavior patterns during exploitation attempts, potentially revealing additional information about the underlying infrastructure.
Mitigation strategies for CVE-2002-0496 should focus on immediate patch application and comprehensive input validation implementation. The most effective approach involves updating the SouthWest Talker server to a patched version that properly validates all URL parameters and implements robust error handling procedures. Network administrators should also consider implementing firewall rules that restrict access to port 5002 to trusted sources only, while monitoring for suspicious traffic patterns that may indicate exploitation attempts. Additionally, deploying intrusion detection systems that can identify malformed URL requests targeting this specific port will provide early warning capabilities. The vulnerability's characteristics align with ATT&CK technique T1498, which covers network denial of service attacks, and T1595, which addresses reconnaissance through network scanning activities. Organizations should also implement proper logging and monitoring procedures to track access attempts to port 5002 and establish incident response protocols for rapid remediation when exploitation is detected. Regular security assessments should include verification that all HTTP server components properly validate input parameters and implement appropriate defensive measures against malformed data processing.