CVE-2024-9132
📋 TL;DR
This vulnerability allows administrators to configure insecure captive portal scripts in Arista EOS devices, potentially enabling remote code execution. Attackers could exploit this to execute arbitrary code on affected devices. This affects Arista EOS users with administrative access to captive portal configuration.
💻 Affected Systems
- Arista EOS
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote attacker gains full control of the device through arbitrary code execution, potentially compromising the entire network segment.
Likely Case
Privileged attacker with administrative access executes malicious scripts through the captive portal, leading to device compromise.
If Mitigated
With proper access controls and script validation, impact is limited to configuration errors without code execution.
🎯 Exploit Status
Requires administrative access to configure malicious scripts. Exploitation depends on administrator actions or credential compromise.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check Arista advisory for specific fixed versions
Vendor Advisory: https://www.arista.com/en/support/advisories-notices/security-advisory/20454-security-advisory-0105
Restart Required: No
Instructions:
1. Review Arista advisory for fixed versions. 2. Upgrade affected EOS devices to patched version. 3. Validate captive portal configurations post-upgrade.
🔧 Temporary Workarounds
Restrict Captive Portal Configuration Access
allLimit administrative access to captive portal configuration to trusted personnel only
configure terminal
aaa authorization commands default local
aaa authorization commands console local
Validate Captive Portal Scripts
allImplement script validation and review process for all captive portal configurations
🧯 If You Can't Patch
- Implement strict access controls for administrative accounts
- Monitor and audit all captive portal configuration changes
🔍 How to Verify
Check if Vulnerable:
Check EOS version and review captive portal configurations for potentially malicious scriptsCheck Version:
show version | include Software image versionVerify Fix Applied:
Verify EOS version is patched and review captive portal configuration logs📡 Detection & Monitoring
Log Indicators:
- Unauthorized captive portal configuration changes
- Suspicious script execution in captive portal logs
Network Indicators:
- Unexpected network traffic from captive portal devices
- Anomalous DNS or HTTP requests from portal
SIEM Query:
source="arista-eos" AND (event_type="configuration_change" AND object="captive-portal")