CVE-2021-25737
CVSS V2 Medium 4.9
CVSS V3 Medium 4.8
Description
A security issue was discovered in Kubernetes where a user may be able to redirect pod traffic to private networks on a Node. Kubernetes already prevents creation of Endpoint IPs in the localhost or link-local range, but the same validation was not performed on EndpointSlice IPs.
Overview
- CVE ID
- CVE-2021-25737
- Assigner
- jordan@liggitt.net
- Vulnerability Status
- Analyzed
- Published Version
- 2021-09-06T12:15:07
- Last Modified Date
- 2021-10-07T17:55:09
Weakness Enumerations
CPE Configuration (Product)
| CPE | Vulnerable | Operator | Version Start | Version End |
|---|---|---|---|---|
| cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* | 1 | OR | 1.16.0 | 1.18.19 |
| cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* | 1 | OR | 1.19.0 | 1.19.10 |
| cpe:2.3:a:kubernetes:kubernetes:*:*:*:*:*:*:*:* | 1 | OR | 1.20.0 | 1.20.7 |
| cpe:2.3:a:kubernetes:kubernetes:1.21.0:-:*:*:*:*:*:* | 1 | OR |
CVSS Version 2
- Version
- 2.0
- Vector String
- AV:N/AC:M/Au:S/C:P/I:P/A:N
- Access Vector
- NETWORK
- Access Compatibility
- MEDIUM
- Authentication
- SINGLE
- Confidentiality Impact
- PARTIAL
- Integrity Impact
- PARTIAL
- Availability Impact
- NONE
- Base Score
- 4.9
- Severity
- MEDIUM
- Exploitability Score
- 6.8
- Impact Score
- 4.9
CVSS Version 3
- Version
- 3.1
- Vector String
- CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
- Attack Vector
- NETWORK
- Attack Compatibility
- LOW
- Privileges Required
- HIGH
- User Interaction
- REQUIRED
- Scope
- CHANGED
- Confidentiality Impact
- LOW
- Availability Impact
- NONE
- Base Score
- 4.8
- Base Severity
- MEDIUM
- Exploitability Score
- 1.7
- Impact Score
- 2.7
References
| Reference URL | Reference Tags |
|---|---|
| https://github.com/kubernetes/kubernetes/issues/102106 | Patch Third Party Advisory |
| https://groups.google.com/g/kubernetes-security-announce/c/xAiN3924thY | Mailing List Third Party Advisory |
| https://security.netapp.com/advisory/ntap-20211004-0004/ | Third Party Advisory |
Sources
| Source Name | Source URL |
|---|---|
| NIST | https://nvd.nist.gov/vuln/detail/CVE-2021-25737 |
| MITRE | https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-25737 |
History
| Created | Old Value | New Value | Data Type | Notes |
|---|---|---|---|---|
| 2022-05-10 06:52:08 | Added to TrackCVE | |||
| 2022-12-05 09:39:20 | security@kubernetes.io | jordan@liggitt.net | CVE Assigner | updated |
| 2022-12-05 09:39:20 | 2021-09-06T12:15Z | 2021-09-06T12:15:07 | CVE Published Date | updated |
| 2022-12-05 09:39:20 | 2021-10-07T17:55:09 | CVE Modified Date | updated | |
| 2022-12-05 09:39:20 | Analyzed | Vulnerability Status | updated |