CVE-2002-0882 in 7910
Summary
by MITRE
The web server for Cisco IP Phone (VoIP) models 7910, 7940, and 7960 allows remote attackers to cause a denial of service (reset) and possibly read sensitive memory via a large integer value in (1) the stream ID of the StreamingStatistics script, or (2) the port ID of the PortInformation script.
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Analysis
by VulDB Data Team • 09/12/2025
The vulnerability identified as CVE-2002-0882 affects Cisco IP Phone models 7910, 7940, and 7960, which are part of Cisco's VoIP communication infrastructure. These devices operate as web servers within their network environment, providing web-based interfaces for configuration and monitoring purposes. The flaw resides in the handling of specific script parameters within the web server implementation, creating a potential attack vector that could compromise the availability and confidentiality of the affected systems. This vulnerability represents a classic case of improper input validation that can lead to system instability and information disclosure.
The technical implementation of this vulnerability stems from insufficient bounds checking in two specific web scripts: StreamingStatistics and PortInformation. When remote attackers provide excessively large integer values in the stream ID parameter of the StreamingStatistics script or the port ID parameter of the PortInformation script, the web server fails to properly validate these inputs. This lack of input sanitization allows the device to process malformed data that exceeds expected parameter ranges, leading to memory corruption or buffer overflow conditions. The vulnerability operates at the application layer of the network stack and specifically targets the web server component that handles these particular scripts. According to CWE classification, this represents a CWE-129: Improper Validation of Array Index vulnerability, where the system fails to validate input values against acceptable ranges before processing them.
The operational impact of this vulnerability extends beyond simple denial of service to potentially expose sensitive system information. When exploited, the vulnerability can cause the affected IP phone devices to reset or crash, resulting in service interruption for voice communications within the network. This denial of service condition directly affects business continuity and can be particularly disruptive in mission-critical environments where reliable communication is essential. Additionally, the vulnerability may allow attackers to read portions of the device's memory, potentially exposing sensitive information such as configuration data, authentication credentials, or system internals. The attack vector requires no authentication and can be executed remotely, making it particularly dangerous as it allows adversaries to compromise network infrastructure without requiring physical access or network credentials.
Mitigation strategies for CVE-2002-0882 should focus on both immediate protective measures and long-term architectural improvements. Cisco has released patches and firmware updates to address this vulnerability, which should be deployed immediately across all affected devices. Network administrators should implement access control measures to limit exposure of these web servers to trusted networks only, reducing the attack surface. The implementation of input validation controls at the application level can help prevent similar issues in the future, with proper bounds checking and parameter validation for all integer inputs. Additionally, network monitoring solutions should be configured to detect unusual traffic patterns that may indicate exploitation attempts. From an ATT&CK framework perspective, this vulnerability maps to T1499.004: Endpoint Denial of Service and T1566.001: Phishing, as it represents a remote exploitation vector that can be used to disrupt services and potentially gain further access to network resources through the exposed memory contents. Organizations should also consider implementing network segmentation and privilege separation to limit the potential impact should exploitation occur.