Horizon Alert
Summary of the vulnerability and why it matters
Cisco IOS XR Software contains a vulnerability in its Cisco Discovery Protocol implementation. This flaw stems from improper validation of string input within specific fields of Cisco Discovery Protocol messages. An attacker in the same network segment as an affected device could potentially exploit this to execute arbitrary code or force a system reload. The primary business impact involves unauthorized code execution with administrative privileges and potential disruption of network services.
- Vulnerable Cisco Discovery Protocol.
- Improper string input validation.
- Arbitrary code execution risk.
- Potential service disruption.
Attack Path
How an attacker could exploit the issue
This vulnerability impacts network devices running Cisco IOS XR Software. An attacker can exploit this by sending a specially crafted Cisco Discovery Protocol message. Successful exploitation may lead to the execution of arbitrary code with administrative privileges or a device reload, affecting operational stability and data integrity.
- Exposure: Devices must be accessible within the same network segment.
- Attacker: An unauthenticated, adjacent network user.
- Trigger: Malicious Cisco Discovery Protocol message.
- Impact: Arbitrary code execution or device reload.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability could allow an attacker to execute arbitrary code with administrative privileges or cause a device reload. The exploit requires the attacker to be on the same network segment as the affected device. The Cisco Discovery Protocol is used for network device discovery.
- Attackers need adjacent network access.
- Exploitation could lead to code execution.
- Business risk and urgency are HIGH.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability impacts Cisco IOS XR Software, potentially allowing an adjacent attacker to execute arbitrary code or reload an affected device. The issue stems from improper validation of Cisco Discovery Protocol messages. Successful exploitation could lead to the execution of code with administrative privileges on the device.
- Identify exposed network assets.
- Reduce network exposure.
- Apply vendor fixes and verify.
- Monitor for related issues.
