Vulnerability · Published Dec 7, 2020 · Assigned by kubernetes
CVE-2020-8565Incomplete fix for CVE-2019-11250 allows for token leak in logs when logLevel >= 9
Medium 4.7
In plain English
A medium-severity sensitive data in logs in Kubernetes from Kubernetes. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 44% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)4.7Medium
Exploit odds (30 days)0.5%top 55.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
In Kubernetes, if the logging level is set to at least 9, authorization and bearer tokens will be written to log files. This can occur both in API server logs and client tool output like kubectl. This affects <= v1.19.3, <= v1.18.10, <= v1.17.13, < v1.20.0-alpha2.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | kubernetes | 1.20.0-1 | DEBIAN-CVE-2020-8565 |
| Debian:13 | kubernetes | 1.20.0-1 | DEBIAN-CVE-2020-8565 |
| Debian:14 | kubernetes | 1.20.0-1 | DEBIAN-CVE-2020-8565 |
| Go | k8s.io/client-go | 0.17.16 | GHSA-8cfg-vx93-jvxw |
| Go | k8s.io/client-go | 0.20.0-alpha.2 | GO-2021-0064 |
| Go | k8s.io/client-go | 0.19.6 | GHSA-8cfg-vx93-jvxw |
| Go | k8s.io/client-go | 0.20.0-alpha.2 | GHSA-8cfg-vx93-jvxw |
| Go | k8s.io/client-go | 0.18.14 | GHSA-8cfg-vx93-jvxw |
| Go | k8s.io/kubernetes | 1.20.0-alpha.2 | GHSA-8cfg-vx93-jvxw |
| Ubuntu:22.04:LTS | kubernetes | no fix listed | UBUNTU-CVE-2020-8565 |
| Ubuntu:24.04:LTS | kubernetes | no fix listed | UBUNTU-CVE-2020-8565 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Kubernetes | Kubernetes | <= 1.19.3<= 1.18.10<= 1.17.13< 1.20.0-alpha2 |
Weakness: CWE-532 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
References
- Multiple secret leaks when verbose logging is enabled mailing-list, x_refsource_MLIST
- https://github.com/kubernetes/kubernetes/issues/95623 x_refsource_CONFIRM