{"record":{"id":"c7d61216bb20843e","repo":"crowdsecurity/crowdsec","slug":"while-getting-owner-w","errorCode":null,"errorMessage":"while getting owner: %w","messagePattern":"while getting owner: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"error","filePath":"pkg/csplugin/utils_windows.go","lineNumber":91,"sourceCode":"\t\treturn fmt.Errorf(\"while getting current user: %w\", err)\n\t}\n\n\tcurrentUserSid, _, _, err := windows.LookupSID(\"\", currentUser.Username)\n\n\tif err != nil {\n\t\treturn fmt.Errorf(\"while looking up current user sid: %w\", err)\n\t}\n\n\tsd, err := windows.GetNamedSecurityInfo(path, windows.SE_FILE_OBJECT, windows.OWNER_SECURITY_INFORMATION|windows.DACL_SECURITY_INFORMATION)\n\tif err != nil {\n\t\treturn fmt.Errorf(\"while getting owner security info: %w\", err)\n\t}\n\tif !sd.IsValid() {\n\t\treturn errors.New(\"security descriptor is invalid\")\n\t}\n\towner, _, err := sd.Owner()\n\tif err != nil {\n\t\treturn fmt.Errorf(\"while getting owner: %w\", err)\n\t}\n\tif !owner.IsValid() {\n\t\treturn errors.New(\"owner is invalid\")\n\t}\n\n\tif !owner.Equals(systemSid) && !owner.Equals(currentUserSid) && !owner.Equals(adminSid) {\n\t\treturn fmt.Errorf(\"plugin at %s is not owned by SYSTEM, Administrators or by current user, but by %s\", path, owner.String())\n\t}\n\n\tdacl, _, err := sd.DACL()\n\tif err != nil {\n\t\treturn fmt.Errorf(\"while getting DACL: %w\", err)\n\t}\n\n\tif dacl == nil {\n\t\treturn fmt.Errorf(\"no DACL found on plugin, meaning fully permissive access on plugin %s\", path)\n\t}\n","sourceCodeStart":73,"sourceCodeEnd":109,"githubUrl":"https://github.com/crowdsecurity/crowdsec/blob/909b5157986a2b2c2163300fdaef5ed01289f7d2/pkg/csplugin/utils_windows.go#L73-L109","documentation":"After retrieving the security descriptor, CheckPerms extracts the owner SID via (*SECURITY_DESCRIPTOR).Owner() (wrapping Win32 GetSecurityDescriptorOwner) and verifies the SID is valid. This error wraps a failure of the Owner() accessor, which should only fail if the security descriptor memory is malformed.","triggerScenarios":"Calling CheckPerms when sd.Owner() returns a non-nil error — the descriptor returned by GetNamedSecurityInfo is valid per IsValid() but its owner field cannot be read, an extremely rare low-level Win32 condition.","commonSituations":"Corrupted security descriptors produced by faulty backup/restore tools or third-party ACL editors; security software returning mangled descriptor data; filesystem driver issues on exotic storage.","solutions":["Reset the plugin file's ACLs to defaults (`icacls <plugin> /reset`) and re-verify","Re-copy the plugin binary from a trusted source so a fresh security descriptor is created","Read the wrapped %w error for the specific Win32 failure code","If reproducible, check the storage volume/driver for corruption (chkdsk)"],"exampleFix":"// before\nowner, _, err := sd.Owner()\nif err != nil {\n\treturn fmt.Errorf(\"while getting owner: %w\", err)\n}\n// after\nowner, _, err := sd.Owner()\nif err != nil {\n\treturn fmt.Errorf(\"while getting owner of %s security descriptor: %w\", path, err)\n}","handlingStrategy":"try-catch","validationCode":"// pre-validate the descriptor parses cleanly\nsd, err := windows.GetNamedSecurityInfo(path, windows.SE_FILE_OBJECT, windows.OWNER_SECURITY_INFORMATION)\nif err == nil && !sd.IsValid() {\n\treturn errors.New(\"security descriptor is corrupt before check\")\n}","typeGuard":null,"tryCatchPattern":"err := CheckPerms(pluginPath)\nif err != nil && strings.Contains(err.Error(), \"while getting owner\") {\n\tlog.Warnf(\"corrupt owner SID on %s, reset ACLs with: icacls %s /reset\", pluginPath, pluginPath)\n}","preventionTips":["Avoid third-party ACL editors on plugin binaries","Restore files with ACL-preserving tools only","Run chkdsk if descriptor errors appear on many files"],"tags":["windows","acl","security"],"backgroundTag":"internal-invariant-violation","analyzedSha":"909b5157986a2b2c2163300fdaef5ed01289f7d2","analyzedAt":"2026-09-06T12:27:26.012Z","contentChangedAt":"2026-09-06T12:27:26.012Z","schemaVersion":2},"datasetVersion":"2026-09-14T00:17:10.932Z"}