CVE-2021-1464
📋 TL;DR
This vulnerability in Cisco SD-WAN vManage Software allows authenticated remote attackers to bypass authorization checks and access restricted configuration data. The issue stems from insufficient input validation in certain commands. Organizations using affected Cisco SD-WAN vManage versions are at risk.
💻 Affected Systems
- Cisco SD-WAN vManage Software
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers could access sensitive network configuration data, potentially enabling further attacks or network disruption.
Likely Case
Unauthorized access to configuration information that could reveal network architecture and security settings.
If Mitigated
Limited impact with proper network segmentation and monitoring in place.
🎯 Exploit Status
Requires authenticated access and knowledge of vulnerable commands.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 20.3.4, 20.4.2, 20.5.1 or later
Vendor Advisory: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vman-auth-bypass-Z3Zze5XC
Restart Required: Yes
Instructions:
1. Backup current configuration. 2. Download appropriate patch from Cisco Software Center. 3. Apply patch following Cisco SD-WAN upgrade procedures. 4. Verify successful upgrade and functionality.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vManage from untrusted networks.
- Enhance monitoring and alerting for unusual access patterns to vManage configuration endpoints.
🔍 How to Verify
Check if Vulnerable:
Check vManage software version via CLI: show version | include vManageCheck Version:
show version | include vManageVerify Fix Applied:
Verify version is 20.3.4, 20.4.2, 20.5.1 or later using: show version | include vManage📡 Detection & Monitoring
Log Indicators:
- Unusual access patterns to configuration endpoints
- Multiple failed authorization attempts followed by successful access
Network Indicators:
- Unusual traffic to vManage configuration APIs from unexpected sources
SIEM Query:
source="vmanage" AND (event_type="config_access" OR event_type="authorization_failure")🔗 References
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdw-sqlinj-HDJUeEAX
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-vdaemon-bo-RuzzEA2
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vman-auth-bypass-Z3Zze5XC
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vman-authorization-b-GUEpSLK
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vman-cmdinj-nRHKgfHX
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vman-dir-trav-Bpwc5gtm
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vman-xml-ext-entity-q6Z7uVUg
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vmanage-cql-inject-c7z9QqyB
- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-vmanage-info-disclos-gGvm9Mfu
