CVE-2021-25737GHSA-MFV7-GQ43-W965GO-2022-0908
Holes in EndpointSlice Validation Enable Host Network Hijack
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 1.18.19, 1.19.11, 1.20.7, 1.21.1
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
A security issue was discovered in Kubernetes where a user may be able to redirect pod traffic to private networks on a Node. Kubernetes already prevents creation of Endpoint IPs in the localhost or link-local range, but the same validation was not performed on EndpointSlice IPs.
Timeline
- CVE published
- Record last updated
Affected versions
- Kubernetes Kubernetes
through 1.18.18; through 1.19.10; through 1.20.6; through 1.21.0
- k8s.io/kubernetesGo
From 1.16.0 · fixed in 1.18.19
- k8s.io/kubernetesGo
From 1.19.0 · fixed in 1.19.11
- k8s.io/kubernetesGo
From 1.20.0 · fixed in 1.20.7
- k8s.io/kubernetesGo
From 1.21.0 · fixed in 1.21.1
- k8s.io/kubernetesGo
From 1.16.0 · fixed in 1.18.19; From 1.19.0 · fixed in 1.19.11; From 1.20.0 · fixed in 1.20.7; From 1.21.0 · fixed in 1.21.1