VDB
CVE-2020-8557
CVE-2020-8557
REJECTED
The Kubernetes kubelet component in versions 1.1-1.16.12, 1.17.0-1.17.8 and 1.18.0-1.18.5 do not account for disk usage by a pod which writes to its own /etc/hosts file. The /etc/hosts file mounted in a pod by kubelet is not included by the kubelet eviction manager when calculating ephemeral storage usage by a pod. If a pod writes a large amount of data to the /etc/hosts file, it could fill the storage space of the node and cause the node to fail.
EPSS 0.11% · 29.2th percentile
Risk Scores
EPSS Score
0.11%
29.2th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:24.04:LTS | kubernetes | 0, 1.0 |
| Ubuntu:22.04:LTS | kubernetes | 0, 1.0 |
| Ubuntu:Pro:20.04:LTS | kubernetes | 1.0, 0 |
Exploit Intelligence
- Node disk DOS by writing to container /etc/hosts (hackerone)
- Node disk DOS by writing to container /etc/hosts (hackerone)
- Node disk DOS by writing to container /etc/hosts (hackerone)
- CVE.json (github-poc)
- CVE.json (github-poc)
- CVE.json (github-poc)
- CVE.json (github-poc)
- CVE.json (github-poc)
- CVE.json (github-poc)
- CVE.json (github-poc)
…and 13 more exploits
Timeline
- CVE Published
- Jul 22, 2020 PoC Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Feb 28, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 1, 2022 EPSS Score
- Jul 3, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2020-8557 third-party-advisory
- https://github.com/kubernetes/kubernetes/issues/93032 third-party-advisory
- https://github.com/kubernetes/kubernetes/pull/92916 third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2020-8557 third-party-advisory