↳ GitHub sourceAnalytics ruleInformational
Execution of software vulnerable to webp buffer overflow of CVE-2023-4863
Description
'This query looks at device, process, and network events from Defender for Endpoint that may be vulnerable to buffer overflow defined in CVE-2023-4863. Results are not an indicator of malicious activity.'
- Rule type
- Scheduled
- Version
- 1.1.3
- Declared status
- Available
- Query frequency
- 1h
- Query period
- 1h
- Trigger
- gt 0
Declared MITRE coverage
Declared sources
Metadata from the source file. No dependencies inferred from KQL.
Connectors
Data types
KQL query
Original query, unchanged.
//CVE-2023-4863 Process activity with .webp files on devices where CVE-2023-4863 is unpatched
//This query shows all process activity with .webp files on vulnerable machines and is not an indicator of malicious activity
let VulnDevices = DeviceTvmSoftwareVulnerabilities
| where CveId == "CVE-2023-4863"
| distinct DeviceId;
union DeviceProcessEvents, DeviceNetworkEvents, DeviceEvents
| where DeviceId in (VulnDevices) and (InitiatingProcessCommandLine has(".webp") or ProcessCommandLine has(".webp"))
| extend Name = tostring(split(AccountUpn, "@")[0]), UPNSuffix = tostring(split(AccountUpn, "@")[1])
| extend HostName = tostring(split(DeviceName, ".")[0]), DomainIndex = toint(indexof(DeviceName, '.'))
| extend HostNameDomain = iff(DomainIndex != -1, substring(DeviceName, DomainIndex + 1), DeviceName)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
26e81021-2de6-4442-a74a-a77885e96911
GSTEP / CATALOG TRACKING
Added to catalog : 16 Sept 2026 · 05:49 UTC
Last change observed : 16 Sept 2026 · 05:49 UTC