Bug 2076618 (CVE-2021-25746)

Summary: CVE-2021-25746 k8s.io/ingress-nginx: directive injection via annotations
Product: [Other] Security Response Reporter: Guilherme de Almeida Suckevicz <gsuckevi>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: gparvin, jramanat, njean, pahickey, security-response-team, stcannon
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the ingress-nginx controller. When a user creates or updates ingress objects, credentials of the ingress-nginx controller can be obtained by accessing .metadata.annotations.
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Last Closed: 2022-04-26 09:15:56 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Blocks: 2076624    

Description Guilherme de Almeida Suckevicz 2022-04-19 13:56:04 UTC 
A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use `.metadata.annotations` in an Ingress object (in the `networking.k8s.io` or `extensions` API group) to obtain the credentials of the ingress-nginx controller. In the default configuration, that credential has access to all secrets in the cluster. This bug affects ingress-nginx. If you do not have ingress-nginx installed on your cluster, you are not affected. You can check this by running `kubectl get po -n ingress-nginx`. Multitenant environments where non-admin users have permissions to create Ingress objects are most affected by this issue.
Comment 1 Product Security DevOps Team 2022-04-26 09:15:54 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-25746