CVE-2021-31999
Last modified
CVE-2021-31999 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. A Reliance on Untrusted Inputs in a Security Decision vulnerability in Rancher allows users in the cluster to act as others users in the cluster by forging the "Impersonate-User" or "Impersonate-Group" headers. This issue affects: Rancher versions prior to 2.5.9. EPSS estimates a 1.05% chance of exploitation in the next 30 days.
Description
A Reliance on Untrusted Inputs in a Security Decision vulnerability in Rancher allows users in the cluster to act as others users in the cluster by forging the "Impersonate-User" or "Impersonate-Group" headers. This issue affects: Rancher versions prior to 2.5.9. Rancher versions prior to 2.4.16.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Rancher | Rancher | < 2.4.16 |
| Rancher | Rancher | >= 2.5.0, < 2.5.9 |
References
- https://bugzilla.suse.com/show_bug.cgi?id=1187084Issue Tracking, Release Notes, Third Party Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1187084Issue Tracking, Release Notes, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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