Horizon Alert
Summary of the vulnerability and why it matters
A vulnerability exists within the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS and IOS XE Software. This flaw could permit an unauthenticated, remote attacker to trigger a memory leak or device reload, leading to a denial of service for the affected device. The issue stems from the software's incorrect handling of specific IKEv2 packets.
- Cisco IOS and IOS XE Software IKEv2 module
- Incorrect processing of IKEv2 packets
- Denial of service impacting network operations
Attack Path
How an attacker could exploit the issue
A vulnerability in Cisco's Internet Key Exchange Version 2 (IKEv2) module allows an unauthenticated, remote attacker to cause a denial of service. This occurs when specially crafted IKEv2 packets are sent to an affected device, leading to excessive memory consumption and eventual device reload. The impact is a disruption of network services for organizations relying on the affected devices.
- External network exposure.
- Attacker sends crafted packets.
- Device reloads, causing DoS.
Live Threat
Current exploitation, exposure, and threat context
A vulnerability in Cisco's Internet Key Exchange Version 2 (IKEv2) module could allow an unauthenticated, remote attacker to cause a denial-of-service condition by exploiting a memory leak or causing a device reload. This could disrupt network connectivity for affected organizations. The vulnerability is triggered by sending crafted IKEv2 packets to an affected device.
- Attackers with low skill can exploit.
- No access or conditions are required.
- Business risk is high; treat as urgent.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability involves the Internet Key Exchange Version 2 (IKEv2) module in Cisco IOS Software and Cisco IOS XE Software. It can allow an unauthenticated, remote attacker to cause a denial of service condition by sending crafted IKEv2 packets. Successful exploitation could lead to a memory leak, causing the affected device to reload and disrupt services. The High severity rating and Network attack vector indicate potential significant business risk.
- Find affected Cisco IOS/IOS XE assets.
- Reduce exposure or isolate risk.
- Fix, verify, and monitor.
