etcd Key name can be accessed via LeaseTimeToLive API

### Impact LeaseTimeToLive API allows access to key names (not value) associated to a lease when `Keys` parameter is true, even a user doesn't have read permission to the keys. The impact is limited to a cluster which enables auth (RBAC). ### Patches < v3.4.26 and < v3.5.9 are affected. ### Workarounds No. ### Reporter Yoni Rozenshein

CVSS 3.1

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

Severity from

GitHub (reviewed advisory)

Weakness

CWE-200

Also known as

BIT-etcd-2023-32082, CVE-2023-32082

• github.com/etcd-io/etcd/security/advisories/GHSA-3p4g-rcw5-8298
• nvd.nist.gov/vuln/detail/CVE-2023-32082
• github.com/etcd-io/etcd/pull/15656
• github.com/etcd-io/etcd
• github.com/etcd-io/etcd/blob/main/CHANGELOG/CHANGELOG-3.4.md
• github.com/etcd-io/etcd/blob/main/CHANGELOG/CHANGELOG-3.5.md