CVE-2004-1680 in Xpressa
Summary
by MITRE
application.cgi in the Pingtel Xpressa handset running firmware 2.1.11.24 allows remote authenticated users to cause a denial of service (VxWorks OS crash) via a long HTTP GET request, possibly triggering a buffer overflow.
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Analysis
by VulDB Data Team • 06/21/2018
The vulnerability identified as CVE-2004-1680 affects the Pingtel Xpressa handset running firmware version 2.1.11.24 and resides within the application.cgi component. This issue represents a classic buffer overflow vulnerability that manifests through HTTP GET requests, demonstrating the critical importance of input validation in embedded systems and VoIP devices. The vulnerability specifically targets the VxWorks operating system kernel, which is commonly used in embedded telecommunications equipment, making this a significant concern for network infrastructure security.
The technical flaw occurs when the application.cgi script processes HTTP GET requests without proper bounds checking on the input parameters. When an authenticated remote attacker sends a specially crafted HTTP GET request containing an excessively long parameter, the system's buffer management fails to handle the overflow gracefully. This vulnerability is classified under CWE-121 as a stack-based buffer overflow, where the excessive input overflows into adjacent memory locations, potentially corrupting critical system data structures. The VxWorks OS crash that results from this overflow represents a denial of service condition that can render the entire handset inoperable.
From an operational perspective, this vulnerability creates a substantial risk for organizations deploying VoIP infrastructure, as it allows attackers to remotely disrupt communication services through authenticated access. The requirement for authentication means that attackers must first compromise legitimate credentials, but once obtained, they can systematically crash devices and disrupt business operations. This vulnerability aligns with ATT&CK technique T1499.004, which describes denial of service attacks targeting network infrastructure. The impact extends beyond individual device compromise to potentially affecting entire communication networks that rely on these handsets for voice services.
The mitigation strategies for this vulnerability primarily involve firmware updates from Pingtel, which would include proper input validation and buffer management routines. Organizations should implement network segmentation to limit access to VoIP devices and establish strict authentication controls to prevent unauthorized access. Additionally, monitoring network traffic for suspicious HTTP GET requests and implementing intrusion detection systems can help detect exploitation attempts. The vulnerability underscores the importance of regular firmware updates and security assessments for embedded systems, particularly those operating in critical communication environments where service availability is paramount for business continuity.