Vulnerability · Published Jul 14, 2023 · Assigned by GitHub_M
CVE-2023-34236Information Disclosure Vulnerability in Weave GitOps Terraform Controller
High 8.5
In plain English
A high-severity information exposure in tf-controller from weaveworks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 62% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Weave GitOps Terraform Controller (aka Weave TF-controller) is a controller for Flux to reconcile Terraform resources in a GitOps way. A vulnerability has been identified in Weave GitOps Terraform Controller which could allow an authenticated remote attacker to view sensitive information. This vulnerability stems from Weave GitOps Terraform Runners (`tf-runner`), where sensitive data is inadvertently printed - potentially revealing sensitive user data in their pod logs. In particular, functions `tfexec.ShowPlan`, `tfexec.ShowPlanRaw`, and `tfexec.Output` are implicated when the `tfexec` object set its `Stdout` and `Stderr` to be `os.Stdout` and `os.Stderr`. An unauthorized remote attacker could exploit this vulnerability by accessing these prints of sensitive information, which may contain configurations or tokens that could be used to gain unauthorized control or access to resources managed by the Terraform controller. A successful exploit could allow the attacker to utilize this sensitive data, potentially leading to unauthorized access or control of the system. This vulnerability has been addressed in Weave GitOps Terraform Controller versions `v0.14.4` and `v0.15.0-rc.5`. Users are urged to upgrade to one of these versions to mitigate the vulnerability. As a temporary measure until the patch can be applied, users can add the environment variable `DISABLE_TF_LOGS` to the tf-runners via the runner pod template of the Terraform Custom Resource. This will prevent the logging of sensitive information and mitigate the risk of this vulnerability.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Go | github.com/weaveworks/tf-controller | 0.14.4 | GHSA-6hvv-j432-23cv |
| Go | github.com/weaveworks/tf-controller | 0.15.0-rc.5 | GHSA-6hvv-j432-23cv |
| Go | github.com/weaveworks/tf-controller | 0.14.4, 0.15.0-rc.5 | GO-2023-1925 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| weaveworks | tf-controller | < 0.14.4>= 0.15.0-rc.1, < 0.15.0-rc.5 |
Weakness: CWE-200 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
References
- https://github.com/weaveworks/tf-controller/security/advisories/GHSA-6hvv-j432-23cv x_refsource_CONFIRM
- https://github.com/weaveworks/tf-controller/issues/637 x_refsource_MISC
- https://github.com/weaveworks/tf-controller/issues/649 x_refsource_MISC
- https://github.com/weaveworks/tf-controller/commit/28282bc644054e157c3b9a3d38f1f9551ce09074 x_refsource_MISC
- https://github.com/weaveworks/tf-controller/commit/6323b355bd7f5d2ce85d0244fe0883af3881df4e x_refsource_MISC
- https://github.com/weaveworks/tf-controller/commit/9708fda28ccd0466cb0a8fd409854ab4d92f7dca x_refsource_MISC
- https://github.com/weaveworks/tf-controller/commit/98a0688036e9dbcf43fa84960d9a1ef3e09a69cf x_refsource_MISC