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Privilege escalation vulnerability via malicious “Connection” header

High
Disper published GHSA-2vjp-5q24-hqjv Dec 14, 2021

Package

gomod components/apiserver-proxy/internal/proxy (Go)

Affected versions

<1.24.7

Patched versions

1.24.7

Description

Problem Type

Header Manipulation

Impact

Due to insufficient input validation of Kyma, authenticated user can pass a Header of their choice and escalate privileges which can completely compromise the cluster.

Patches

The problem was patched in 1.24.7.

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE ID

CVE-2021-38182

Weaknesses