Bug 1173121 - (CVE-2020-11013) VUL-0: CVE-2020-11013: helm: information disclosure via the lookup function
(CVE-2020-11013)
VUL-0: CVE-2020-11013: helm: information disclosure via the lookup function
Status: RESOLVED INVALID
Classification: Novell Products
Product: SUSE Security Incidents
Classification: Novell Products
Component: Incidents
unspecified
Other Other
: P5 - None : Normal
: ---
Assigned To: Security Team bot
Security Team bot
https://smash.suse.de/issue/258454/
:
Depends on:
Blocks:
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Reported: 2020-06-18 14:54 UTC by Wolfgang Frisch
Modified: 2020-06-18 14:55 UTC (History)
1 user (show)

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Found By: Security Response Team
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Marketing QA Status: ---
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Description Wolfgang Frisch 2020-06-18 14:54:06 UTC
CVE-2020-11013

Their is an information disclosure vulnerability in Helm from version 3.1.0 and before version 3.2.0. `lookup` is a Helm template function introduced in Helm v3. It is able to lookup resources in the cluster to check for the existence of specific resources and get details about them. This can be used as part of the process to render templates. The documented behavior of `helm template` states that it does not attach to a remote cluster. However, a the recently added `lookup` template function circumvents this restriction and connects to the cluster even during `helm template` and `helm install|update|delete|rollback --dry-run`. The user is not notified of this behavior. Running `helm template` should not make calls to a cluster. This is different from `install`, which is presumed to have access to a cluster in order to load resources into Kubernetes. Helm 2 is unaffected by this vulnerability. A malicious chart author could inject a `lookup` into a chart that, when rendered through `helm template`, performs unannounced lookups against the cluster a user's `KUBECONFIG` file points to. This information can then be disclosed via the output of `helm template`. This issue has been fixed in Helm 3.2.0

References:
https://bugzilla.redhat.com/show_bug.cgi?id=1848513
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2020-11013
http://people.canonical.com/~ubuntu-security/cve/2020/CVE-2020-11013.html
https://github.com/helm/helm/releases/tag/v3.2.0
https://github.com/helm/helm/security/advisories/GHSA-q8q8-93cv-v6h8
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-11013
Comment 2 Wolfgang Frisch 2020-06-18 14:54:51 UTC
No supported version of helm is affected by this issue.