Horizon Alert
Summary of the vulnerability and why it matters
The web server component within Cisco IP Phones is susceptible to a vulnerability stemming from inadequate validation of incoming HTTP requests. This flaw could permit an unauthorized remote attacker to gain root-level privileges and execute arbitrary code on the affected device. Alternatively, such an attack could force the IP phone to restart, leading to a denial-of-service condition.
- Vulnerable component: Cisco IP Phones web server.
- Core weakness: Improper HTTP request validation.
- Main business impact: Unauthorized code execution or denial of service.
Attack Path
How an attacker could exploit the issue
The vulnerability allows an unauthenticated, remote attacker to gain root-level control or cause a denial-of-service. This is achieved by exploiting a weakness in how the web server handles HTTP requests, specifically a lack of proper input validation. An attacker can send a specially crafted HTTP request to the targeted device's web server.
- Exposure via accessible web server.
- Attacker sends crafted HTTP request.
- Attacker gains root control or causes DoS.
Live Threat
Current exploitation, exposure, and threat context
A vulnerability exists in the web server of Cisco IP Phones that could allow an attacker to execute code with root privileges or cause a denial of service. This is due to a flaw in how the web server handles HTTP requests. An attacker could exploit this by sending a specially crafted HTTP request to a targeted device.
- Likely attacker skill level: High.
- Required access or conditions: Network access.
- Business risk or urgency: High.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability could allow an unauthenticated, remote attacker to execute code with root privileges on an affected device or cause a denial-of-service condition. The issue stems from improper input validation of HTTP requests. An attacker could exploit this by sending a crafted HTTP request to the web server of a targeted Cisco IP Phone. This could result in unauthorized code execution or device interruption, impacting network availability and potentially leading to data compromise.
- Identify all Cisco IP phones.
- Restrict network access to phone web interfaces.
- Apply vendor updates and verify remediation.
- Monitor network for suspicious activity.
