Cisco SPA100 Series Analog Telephone Adapters Web-Based Management Interface File Disclosure Vulnerability

Vulnerability

A vulnerability in the web-based management interface of Cisco SPA100 Series Analog Telephone Adapters (ATAs) could allow an authenticated, remote attacker to view the contents of arbitrary files on an affected device. The issue stems from improper input validation in the web-based management interface [1]. Affected firmware releases are 1.4.1 SR3 and earlier [1].

Exploitation

An attacker must have valid credentials to the web-based management interface. The exploit involves sending a crafted request to the interface, which allows retrieval of arbitrary file contents [1]. No user interaction beyond authentication is required.

Impact

Successful exploitation enables an attacker to read arbitrary files from the device, potentially exposing sensitive information such as configuration details or credentials [1]. This constitutes a confidentiality breach.

Mitigation

Cisco has not released a firmware fix at the time of publication. No workarounds are available [1]. Users should monitor Cisco's advisory for updates and consider upgrading when a fixed version becomes available [1].