Horizon Alert
Summary of the vulnerability and why it matters
The VPN web server component within Cisco Secure Firewall ASA and FTD Software is susceptible to a vulnerability. This flaw allows an authenticated, remote attacker to execute arbitrary code on an affected device. The primary impact can lead to the complete compromise of the affected device.
- Vulnerable VPN web server component
- Improper input validation in HTTP(S) requests
- Complete device compromise
Attack Path
How an attacker could exploit the issue
A remote attacker with valid credentials can exploit a vulnerability in the Cisco Secure Firewall VPN web server. This vulnerability arises from improper handling of user-supplied input in HTTP(S) requests. By sending specially crafted requests, an attacker could execute arbitrary code with root privileges, leading to a complete compromise of the affected device.
- Required exposure: External VPN web server access.
- Attacker starting point: Authenticated VPN user.
- Trigger and result: Crafted HTTP request leads to arbitrary code execution.
Live Threat
Current exploitation, exposure, and threat context
A vulnerability exists in Cisco Secure Firewall ASA and FTD software that could allow an authenticated, remote attacker to execute arbitrary code. This is due to improper handling of user-supplied input in HTTP(S) requests. Successful exploitation could lead to the execution of code as root, potentially resulting in complete compromise of the affected device. The U.S. CISA has identified this vulnerability as a significant threat, adding it to its Known Exploited Vulnerabilities catalog.
- Attacker skill level: Moderate.
- Required access: Valid VPN credentials.
- Business risk or urgency: Critical, requires immediate attention.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
A critical vulnerability exists in Cisco Secure Firewall ASA and FTD software that could allow an authenticated attacker to execute arbitrary code on the device. This is due to improper input validation in HTTP(S) requests. Successful exploitation could lead to complete device compromise.
- Find affected Cisco ASA and FTD assets.
- Isolate exposed VPN web server components.
- Apply vendor updates and verify remediation.
- Monitor for related malicious activity.
