CVE-2022-23652 : capsule-proxy is a reverse proxy for Capsule Operator which provides multi-tenan

capsule-proxy is a reverse proxy for Capsule Operator which provides multi-tenancy in Kubernetes. In versions prior to 0.2.1 an attacker with a proper authentication mechanism may use a malicious `Connection` header to start a privilege escalation attack towards the Kubernetes API Server. This vulnerability allows for an exploit of the `cluster-admin` Role bound to `capsule-proxy`. There are no known workarounds for this issue.

Published 2022-02-22 20:15:08

Updated 2022-03-01 20:08:43

Source GitHub, Inc.

View at NVD, CVE.org

Vulnerability category: BypassGain privilege

Products affected by CVE-2022-23652

Clastix » Capsule-proxy
Versions before (<) 0.2.1
cpe:2.3:a:clastix:capsule-proxy:*:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2022-23652

EPSS FAQ

0.41%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 74 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2022-23652

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
6.5	MEDIUM	AV:N/AC:L/Au:S/C:P/I:P/A:P	8.0	6.4	NIST
Access Vector: Network Access Complexity: Low Authentication: Single Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
8.8	HIGH	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	2.8	5.9	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High
8.8	HIGH	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	2.8	5.9	GitHub, Inc.
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2022-23652

CWE-287 Improper Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Assigned by: security-advisories@github.com (Primary)

References for CVE-2022-23652

https://github.com/clastix/capsule-proxy/security/advisories/GHSA-9cwv-cppx-mqjm

Privilege escalation using hop-by-hop Connection header · Advisory · clastix/capsule-proxy · GitHub
Third Party Advisory
https://github.com/clastix/capsule-proxy/issues/188

Privilege escalation vulnerability via malicious "Connection" header · Issue #188 · clastix/capsule-proxy · GitHub
Exploit;Issue Tracking;Third Party Advisory
https://github.com/clastix/capsule-proxy/commit/efe91f68ebf8a9e3d21491dc57da7b8a746415d8

bug: cve exploiting malicious connection header · clastix/capsule-proxy@efe91f6 · GitHub
Patch;Third Party Advisory

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Vulnerability Details : CVE-2022-23652

Products affected by CVE-2022-23652

Exploit prediction scoring system (EPSS) score for CVE-2022-23652

CVSS scores for CVE-2022-23652

CWE ids for CVE-2022-23652

References for CVE-2022-23652