Horizon Alert
Summary of the vulnerability and why it matters
This vulnerability in Cisco Identity Services Engine (ISE) allows an authenticated attacker with read-only access to execute commands on the device's operating system. The issue stems from how the system handles user input, potentially enabling an attacker to gain user-level access and then escalate to root privileges. In some configurations, this could also lead to a denial of service, preventing new endpoints from accessing the network.
- Attackers need existing credentials.
- Can lead to full system compromise.
- Could disrupt network access for endpoints.
Attack Path
How an attacker could exploit the issue
An attacker with Read Only Admin credentials can abuse this flaw by sending a crafted HTTP request to a Cisco Identity Services Engine (ISE) device. This could allow them to execute arbitrary commands on the device's operating system, gain user-level access, and then escalate to root privileges. In some deployments, this could also lead to a denial-of-service condition, preventing new endpoints from accessing the network.
- Requires Read Only Admin credentials.
- Targets the web interface.
- Successful exploit grants OS access.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability allows an authenticated attacker with read-only access to execute arbitrary commands, potentially leading to full system control and denial of service. Attackers are incentivized by the direct path to root access and the impact on network access. However, the requirement for prior authenticated access limits its immediate appeal for widespread, unauthenticated exploitation.
- Exploitation requires authentication.
- No public exploit code reported.
- KEV list does not contain this CVE.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
Prioritize immediate containment and patching for Cisco Identity Services Engine (ISE) due to a critical command execution vulnerability. Teams should focus on identifying all deployed ISE instances and assessing their network exposure, especially any potentially accessible from external networks. If an instance is confirmed to be exposed or exploitation is suspected, consider isolating it from the network until a patch can be applied.
- Isolate affected ISE instances.
- Apply Cisco's recommended patch.
- Monitor for exploitation attempts.
