CVE-2021-22363
📋 TL;DR
This vulnerability in Huawei eCNS280_TD devices allows attackers to cause service disruption through improper resource management. Attackers need specific access to exploit it, leading to abnormal service conditions. Affects Huawei eCNS280_TD V100R005C10SPC650 deployments.
💻 Affected Systems
- Huawei eCNS280_TD
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete service outage of affected Huawei eCNS280_TD devices, disrupting telecommunications services dependent on this equipment.
Likely Case
Service degradation or temporary unavailability of affected devices requiring manual intervention to restore normal operation.
If Mitigated
Minimal impact with proper access controls and monitoring in place to detect and respond to exploitation attempts.
🎯 Exploit Status
Exploitation requires performing specific operations on the device; no public exploit code available as per advisory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: V100R005C10SPC650 patch version (contact Huawei for specific patch)
Vendor Advisory: https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20210609-01-resource-en
Restart Required: Yes
Instructions:
1. Contact Huawei support for the specific patch 2. Apply patch following Huawei's deployment procedures 3. Restart affected devices 4. Verify service restoration
🔧 Temporary Workarounds
Restrict Access Controls
allLimit administrative and operational access to affected devices to only authorized personnel
Network Segmentation
allIsolate affected devices in separate network segments with strict firewall rules
🧯 If You Can't Patch
- Implement strict access controls and monitoring for all administrative interfaces
- Deploy network-based intrusion detection to monitor for abnormal resource consumption patterns
🔍 How to Verify
Check if Vulnerable:
Check device version via Huawei CLI: display version | include V100R005C10SPC650Check Version:
display versionVerify Fix Applied:
Verify patch installation via Huawei CLI and confirm service stability through monitoring📡 Detection & Monitoring
Log Indicators:
- Abnormal resource consumption logs
- Service restart events
- Unauthorized access attempts to device management interfaces
Network Indicators:
- Unusual traffic patterns to/from affected devices
- Multiple connection attempts to management ports
SIEM Query:
source="huawei_device" AND (event_type="resource_exhaustion" OR event_type="service_restart")