CVE-2021-31999 - CVE House
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Status published High CVE-2021-31999

Rancher: Privilege escalation vulnerability via malicious Connection header

Vulnerability 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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

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High 8.8

Affected Vendor

Affected Software

Rancher, SUSE Linux Enterprise Server 15
Vulnerable Versions:
Rancher

Timeline

Official Publish: July 15th, 2021
Last Modified: September 17th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses (CWE)

CWE-807

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.