Home/CVE/An issue was discovered in Rancher 2 through 2.1.5. Any project member with access to the default namespace can mount th
CVE

CVE-2018-20321

An issue was discovered in Rancher 2 through 2.1.5. Any project member with access to the default namespace can mount th

An issue was discovered in Rancher 2 through 2.1.5. Any project member with access to the default namespace can mount the netes-default service account in a pod, and then use that pod to execute administrative privileged commands against the k8s cluster. This could be mitigated by isolating the default namespace in a separate project, where only cluster admins can be given permissions to access.

As of 2018-12-20, this bug affected ALL clusters created or imported by Rancher.

HIGH · CVSS 8.8 EPSS 0.00442
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-668Exposure of Resource to Wrong Sphere
▤

Affected Products & Versions

1
suse rancher>= 2.0.0 and <= 2.1.5
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
Go github.com/rancher/rancher MODERATE fixed in 2.1.6
▣

Scoring & Timeline

8.8
HIGH · CVSS v3.0 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD10 Apr 2019 · 02:29 PM
CVSS VectorCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://forums.rancher.com/c/announcementsVendor Advisory
https://rancher.com/blog/2019/2019-01-29-explaining-security-vulnerabilities-addressed-in-rancher-v2-1-6-and-v2-0-11/MitigationVendor Advisory
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