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x-pack/auditbeat/module/system/process Report Linux capabilities #37303

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1 change: 1 addition & 0 deletions CHANGELOG.next.asciidoc
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Original file line number Diff line number Diff line change
Expand Up @@ -166,6 +166,7 @@ Setting environmental variable ELASTIC_NETINFO:false in Elastic Agent pod will d

- Add `ignore_errors` option to audit module. {issue}15768[15768] {pull}36851[36851]
- Fix copy arguments for strict aligned architectures. {pull}36976[36976]
- Add process capabilities to the process module. {issue}36404[36404] {pull}37303[37303]

*Filebeat*

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31 changes: 25 additions & 6 deletions x-pack/auditbeat/module/system/process/process.go
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Expand Up @@ -101,12 +101,13 @@ type MetricSet struct {

// Process represents information about a process.
type Process struct {
Info types.ProcessInfo
UserInfo *types.UserInfo
User *user.User
Group *user.Group
Hashes map[hasher.HashType]hasher.Digest
Error error
Info types.ProcessInfo
UserInfo *types.UserInfo
User *user.User
Group *user.Group
CapabilityInfo *types.CapabilityInfo
Hashes map[hasher.HashType]hasher.Digest
Error error
}

// Hash creates a hash for Process.
Expand Down Expand Up @@ -353,6 +354,17 @@ func (ms *MetricSet) processEvent(process *Process, eventType string, action eve
},
}

if process.CapabilityInfo != nil {
if len(process.CapabilityInfo.Effective) > 0 {
event.RootFields.Put("process.thread.capabilities.effective",
process.CapabilityInfo.Effective)
}
if len(process.CapabilityInfo.Permitted) > 0 {
event.RootFields.Put("process.thread.capabilities.permitted",
process.CapabilityInfo.Permitted)
}
}

if process.UserInfo != nil {
putIfNotEmpty(&event.RootFields, "user.id", process.UserInfo.UID)
putIfNotEmpty(&event.RootFields, "user.group.id", process.UserInfo.GID)
Expand Down Expand Up @@ -488,6 +500,13 @@ func (ms *MetricSet) getProcesses() ([]*Process, error) {
process.UserInfo = &userInfo
}

if capIface, ok := sysinfoProc.(types.Capabilities); ok {
process.CapabilityInfo, err = capIface.Capabilities()
if err != nil && process.Error == nil {
process.Error = fmt.Errorf("failed to load capabilities for PID %d: %w",
sysinfoProc.PID(), err)
}
}
// Exclude Linux kernel processes, they are not very interesting.
if runtime.GOOS == "linux" && userInfo.UID == "0" && process.Info.Exe == "" {
continue
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