| Name | CVE-2018-16886 |
| Description | etcd versions 3.2.x before 3.2.26 and 3.3.x before 3.3.11 are vulnerable to an improper authentication issue when role-based access control (RBAC) is used and client-cert-auth is enabled. If an etcd client server TLS certificate contains a Common Name (CN) which matches a valid RBAC username, a remote attacker may authenticate as that user with any valid (trusted) client certificate in a REST API request to the gRPC-gateway. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 923008 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| etcd (PTS) | buster | 3.2.26+dfsg-3 | fixed |
| buster (security) | 3.2.26+dfsg-3+deb10u1 | fixed | |
| bullseye | 3.3.25+dfsg-6 | fixed | |
| bookworm | 3.4.23-4 | fixed | |
| sid, trixie | 3.4.30-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| etcd | source | (unstable) | 3.2.26+dfsg-1 | 923008 |
Introduced by: https://github.com/etcd-io/etcd/commit/0191509637546621d6f2e18e074e955ab8ef374d
Upstream issue: https://github.com/etcd-io/etcd/pull/10366
https://github.com/etcd-io/etcd/commit/bf9d0d8291dc71ecbfb2690612954e1a298154b2
https://github.com/etcd-io/etcd/commit/a9a9466fb8ba11ad7bb6a44d7446fbd072d59887
https://github.com/etcd-io/etcd/commit/99704e2a97e8710da942bdc737417fc9c9a2c03f
https://github.com/etcd-io/etcd/commit/83c051b701d33261eef91a719e4421c81b000ba4