CVE-2021-25742 : A security issue was discovered in ingress-nginx where a user that can create or

A security issue was discovered in ingress-nginx where a user that can create or update ingress objects can use the custom snippets feature to obtain all secrets in the cluster.

Published 2021-10-29 04:15:08

Updated 2021-12-15 14:06:04

Source Kubernetes

View at NVD, CVE.org

Vulnerability category: Input validation

Products affected by CVE-2021-25742

Netapp » Trident » Version: N/A
cpe:2.3:a:netapp:trident:-:*:*:*:*:*:*:*
Matching versions
Kubernetes » Ingress-nginx
Versions before (<) 0.49.1
cpe:2.3:a:kubernetes:ingress-nginx:*:*:*:*:*:*:*:*
Matching versions
Kubernetes » Ingress-nginx » Version: 1.0.0
cpe:2.3:a:kubernetes:ingress-nginx:1.0.0:*:*:*:*:*:*:*
Matching versions

Exploit prediction scoring system (EPSS) score for CVE-2021-25742

EPSS FAQ

0.11%

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

~ 44 %

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

CVSS scores for CVE-2021-25742

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.5	MEDIUM	AV:N/AC:L/Au:S/C:P/I:P/A:N	8.0	4.9	NIST
Access Vector: Network Access Complexity: Low Authentication: Single Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: None
7.6	HIGH	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:L	2.8	4.7	Kubernetes
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: Low Availability: Low
7.1	HIGH	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N	2.8	4.2	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: Low User Interaction: None Scope: Unchanged Confidentiality: High Integrity: Low Availability: None

CWE ids for CVE-2021-25742

CWE-20 Improper Input Validation

The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.

Assigned by: jordan@liggitt.net (Secondary)

References for CVE-2021-25742

https://groups.google.com/g/kubernetes-security-announce/c/mT4JJxi9tQY

[Security Advisory] CVE-2021-25742: Ingress-nginx custom snippets allows retrieval of ingress-nginx serviceaccount token and secrets across all namespaces
Mailing List;Mitigation;Third Party Advisory
https://github.com/kubernetes/ingress-nginx/issues/7837

CVE-2021-25742: Ingress-nginx custom snippets allows retrieval of ingress-nginx serviceaccount token and secrets across all namespaces · Issue #7837 · kubernetes/ingress-nginx · GitHub
Exploit;Issue Tracking;Mitigation;Third Party Advisory
https://security.netapp.com/advisory/ntap-20211203-0001/

CVE-2021-25742 Kubernetes Vulnerability in NetApp Products | NetApp Product Security
Third Party Advisory

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Vulnerability Details : CVE-2021-25742

Products affected by CVE-2021-25742

Exploit prediction scoring system (EPSS) score for CVE-2021-25742

CVSS scores for CVE-2021-25742

CWE ids for CVE-2021-25742

References for CVE-2021-25742