vulnerability / NVI-00015251 / Revision 1
Logging operator has Fluentd configuration injection that allows remote code execution
GitHub lists this reviewed advisory for github.com/kube-logging/logging-operator. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
9.9 critical
GitHub source severity; exploitability and local consequence require separate evidence.
As of · GitHub Advisory Database
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
github.com/kube-logging/logging-operator
source listed< 0.0.0-20260608145523-cf437d7f1e05
### Summary The Fluentd configuration renderer in Logging operator writes strings from CRDs such as `Flow` directly into `fluent.conf` without escaping them. As a result, a user who can create `Flow` resources can inject Fluentd configuration by providing values that contain newlines. In the confirmed path, a value in `record_transformer.records` can close the current `` / `` block and add a new `` block. By specifying Fluentd's core `@type exec` plugin in that injected block, an attacker can execute arbitrary commands inside the Fluentd aggregator. ### Details The issue is in `FluentRender` in `pkg/sdk/logging/model/render/fluent.go`. https://github.com/kube-logging/logging-operator/blob/98275d2984aa8d731c4c975b8006aa433fc7bafa/pkg/sdk/logging/model/render/fluent.go#L60-L87 Each parameter is rendered as `key value`, but values are not quoted, and newlines or characters such as `` are not rejected. In addition, `indentedf` builds the string with `fmt.Sprintf` and then splits it on `\n`, so newlines inside CRD values become new lines in the generated Fluentd configuration. One input source is `record_transformer.records`. `ToDirective` passe
03 / Response
What to do next
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
05 / Provenance
Sources you can inspect
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- GHSA-mjqf-28ph-426h ↗
GitHub Advisory Database · vendor advisory
Observed . GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.
Public revision history
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- Revision 1 ·
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