critical
CVE-2021-28235
etcd: Information discosure via debug function
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.
Severity by source
NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GHSA9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Red Hat9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Bitnami9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Trivy's own label is CRITICAL. Rated critical by NVD, GHSA, Bitnami, CBL-Mariner, Photon OS. Rated lower by Red Hat (high), Ubuntu (medium).
Description
Authentication vulnerability found in Etcd-io v.3.4.10 allows remote attackers to escalate privileges via the debug function.
Affected packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| bitnami::Bitnami Vulnerability Database | etcd | 3.4.11 |
| CBL-Mariner 2.0 | etcd | 0:3.5.4-6.cm2 |
| go::GitHub Security Advisory Go | go.etcd.io/etcd/v3 | no fix listed |
| Photon OS 3.0 | calico, coredns, etcd and 2 more | 3.26.1-1.ph3 and 4 more |
| Photon OS 4.0 | calico, calico-cni, calico-felix and 5 more | 3.26.1-1.ph4 and 4 more |
| Photon OS 5.0 | calico, calico-cni, calico-felix and 8 more | 3.26.1-1.ph5 and 4 more |
| debian 10 | etcd | no fix listed |
| debian 11 | etcd | no fix listed |
| debian 12 | etcd | no fix listed |
| debian 13 | etcd | 3.4.30-1 |
| debian 14 | etcd | 3.4.30-1 |
| echo | etcd | 3.4.30-1 |
Show all 45 entries from 23 sources
| Source | Package | Fixed in |
|---|---|---|
| bitnami::Bitnami Vulnerability Database | etcd | 3.4.11 |
| CBL-Mariner 2.0 | etcd | 0:3.5.4-6.cm2 |
| go::GitHub Security Advisory Go | go.etcd.io/etcd/v3 | no fix listed |
| Photon OS 3.0 | calico | 3.26.1-1.ph3 |
| Photon OS 3.0 | coredns | 1.11.1-1.ph3 |
| Photon OS 3.0 | etcd | 3.5.1-10.ph3 |
| Photon OS 3.0 | flannel | 0.22.0-1.ph3 |
| Photon OS 3.0 | kubernetes-dns | 1.22.23-1.ph3 |
| Photon OS 4.0 | calico | 3.26.1-1.ph4 |
| Photon OS 4.0 | calico-cni | 3.26.1-1.ph4 |
| Photon OS 4.0 | calico-felix | 3.26.1-1.ph4 |
| Photon OS 4.0 | calico-k8s-policy | 3.26.1-1.ph4 |
| Photon OS 4.0 | coredns | 1.11.1-1.ph4 |
| Photon OS 4.0 | etcd | 3.5.1-13.ph4 |
| Photon OS 4.0 | flannel | 0.22.0-1.ph4 |
| Photon OS 4.0 | kubernetes-dns | 1.22.20-1.ph4 |
| Photon OS 5.0 | calico | 3.26.1-1.ph5 |
| Photon OS 5.0 | calico-cni | 3.26.1-1.ph5 |
| Photon OS 5.0 | calico-felix | 3.26.1-1.ph5 |
| Photon OS 5.0 | calico-k8s-policy | 3.26.1-1.ph5 |
| Photon OS 5.0 | coredns | 1.11.1-1.ph5 |
| Photon OS 5.0 | flannel | 0.22.0-1.ph5 |
| Photon OS 5.0 | kubernetes | 1.27.3-1.ph5 |
| Photon OS 5.0 | kubernetes-dashboard | 2.7.0-6.ph5 |
| Photon OS 5.0 | kubernetes-kubeadm | 1.27.3-1.ph5 |
| Photon OS 5.0 | kubernetes-kubelet | 1.27.3-1.ph5 |
| Photon OS 5.0 | kubernetes-pause | 1.27.3-1.ph5 |
| debian 10 | etcd | no fix listed |
| debian 11 | etcd | no fix listed |
| debian 12 | etcd | no fix listed |
| debian 13 | etcd | 3.4.30-1 |
| debian 14 | etcd | 3.4.30-1 |
| echo | etcd | 3.4.30-1 |
| rapidfort debian 12 | etcd | 0:3.4.30-1 |
| rapidfort debian 13 | etcd | 0:3.4.30-1 |
| rapidfort ubuntu 20.04 | etcd | 0:3.3.25+dfsg-7ubuntu0.22.10.2 |
| rapidfort ubuntu 22.04 | etcd | 0:3.3.25+dfsg-7ubuntu0.22.10.2 |
| rapidfort ubuntu 24.04 | etcd | 0:3.3.25+dfsg-7ubuntu0.22.10.2 |
| Red Hat | etcd | no fix listed |
| Red Hat | etcd3 | no fix listed |
| ubuntu 18.04-ESM | etcd | 3.2.17+dfsg-1ubuntu0.1+esm2 |
| ubuntu 20.04-ESM | etcd | 3.2.26+dfsg-6ubuntu0.2+esm1 |
| ubuntu 22.04 | etcd | no fix listed |
| ubuntu 22.10 | etcd | 3.3.25+dfsg-7ubuntu0.22.10.2 |
| ubuntu 23.04 | etcd | 3.4.23-4ubuntu0.1 |
References
- http://etcd.com
- https://access.redhat.com/security/cve/CVE-2021-28235
- https://github.com/etcd-io/etcd
- https://github.com/etcd-io/etcd/commit/1f746597ea6ce9f0a4554108bc853f256e150b0b%20%28v3.4.25%29
- https://github.com/etcd-io/etcd/commit/3618ab4b07cc9c0883b6a642da198877e25d612b%20%28v3.4.25%29
- https://github.com/etcd-io/etcd/pull/15648
- https://github.com/etcd-io/etcd/pull/15655
- https://github.com/lucyxss/etcd-3.4.10-test/blob/master/temp4cj.png
