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Vulnerable Machines related to log4j CVE-2021-44228
Description
'This query uses the Azure Defender Security Nested Recommendations data to find machines vulnerable to log4j CVE-2021-44228.
Log4j is an open-source Apache logging library that is used in many Java-based applications. Security Nested Recommendations data is sent to Microsoft Sentinel using the continuous export feature of Azure Defender(refrence link below).
Reference: https://msrc-blog.microsoft.com/2021/12/11/microsofts-response-to-cve-2021-44228-apache-log4j2/
Reference: https://docs.microsoft.com/azure/security-center/continuous-export?tabs=azure-portal
Reference: https://techcommunity.microsoft.com/t5/microsoft-defender-for-cloud/how-defender-for-cloud-displays-machines-affected-by-log4j/ba-p/3037271'
- Rule type
- Scheduled
- Version
- 1.0.3
- Declared status
- Available
- Query frequency
- 1d
- Query period
- 1d
- Trigger
- gt 0
Declared MITRE coverage
KQL query
Original query, unchanged.
SecurityNestedRecommendation
| where RemediationDescription has 'CVE-2021-44228'
| parse ResourceDetails with * 'virtualMachines/' VirtualMachine '"' *
| summarize arg_min(TimeGenerated, *) by TenantId, RecommendationSubscriptionId, VirtualMachine, RecommendationName,Description,RemediationDescription, tostring(AdditionalData),VulnerabilityId
| extend Timestamp = TimeGenerated
Declared entities
Related content
Links established from declared identifiers and solution manifests.
Source provenance
GitHubDisplayed values come from files in Azure/Azure-Sentinel. They describe the published template, not your workspace configuration.
- Commit
9800e51↗- Source identifier
3d71fc38-f249-454e-8479-0a358382ef9a
GSTEP / CATALOG TRACKING
Added to catalog : 16 Sept 2026 · 05:49 UTC
Last change observed : 16 Sept 2026 · 05:49 UTC