CVE-2020-15113 Improper Preservation of Permissions in etcd
Attackers can read or modify sensitive etcd data if directories are created with insecure permissions due to improper permission preservation.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-15113?
CVE-2020-15113 is a medium-severity vulnerability in Fedoraproject Fedora, published on 5 Aug 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In etcd before versions 3.3.23 and 3.4.10, certain directory paths are created (etcd data directory and the directory path when provided to automatically generate self-signed certificates for TLS connections with clients) with restricted access permissions (700) by using the os.MkdirAll. This function does not perform any permission checks when a given directory path exists already. A possible workaround is to ensure the directories have the desired permission (700).
Weakness: CWE-281
Which versions are affected by CVE-2020-15113?
5 open source packages ship an affected version, including github.com/etcd-io/etcd and etcd. It affects 2 products.
| Package | Affected | Fixed in |
|---|---|---|
github.com/etcd-io/etcd Go | All versions | 3.3.23 |
github.com/etcd-io/etcd Go | All versions | 3.3.23 |
github.com/etcd-io/etcd Go | From 3.4.0-rc.0 | 3.4.10 |
github.com/etcd-io/etcd Go | From 3.4.0-rc.0 | 3.4.10 |
etcd Bitnami | All versions | 3.3.23, 3.4.10 |
Products include Etcd Etcd, Fedoraproject Fedora.
How do I fix CVE-2020-15113?
Upgrade github.com/etcd-io/etcd to a fixed version for your release line: 3.3.23 or 3.4.10.
Is CVE-2020-15113 being exploited?
There is no known exploitation of CVE-2020-15113 in the wild and no public exploit code.
Other vulnerabilities in Fedoraproject Fedora
- CVE-2021-28235 Etcd-io Improper Authentication vulnerability
- CVE-2026-33413 etcd: Authorization bypasses in multiple APIs
- CVE-2022-34038 Denial of service in n/a
- CVE-2018-16886 go.etcd.io/etcd Authentication Bypass
- CVE-2026-59818 etcd: gRPC client listener does not enforce `--client-crl-file` certificate revocation
Sources
Also known as AZL-6390, BIT-etcd-2020-15113, DEBIAN-CVE-2020-15113, GHSA-chh6-ppwq-jh92, UBUNTU-CVE-2020-15113.