CVE-2020-8565 Incomplete fix for CVE-2019-11250 allows for token leak in logs when logLevel >= 9

2020-12-0722:00:19

CWE-532

kubernetes

www.cve.org

kubernetes

logging level

authorization tokens

log files

api serverlogs

kubectl

v1.19.3

v1.18.10

v1.17.13

v1.20.0-alpha2

CVSS3

4.7

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

AI Score

5.4

Confidence

High

EPSS

0.002

Percentile

53.9%

JSON

In Kubernetes, if the logging level is set to at least 9, authorization and bearer tokens will be written to log files. This can occur both in API server logs and client tool output like kubectl. This affects <= v1.19.3, <= v1.18.10, <= v1.17.13, < v1.20.0-alpha2.

CNA Affected

[
  {
    "product": "Kubernetes",
    "vendor": "Kubernetes",
    "versions": [
      {
        "status": "affected",
        "version": "<= 1.19.3"
      },
      {
        "status": "affected",
        "version": "<= 1.18.10"
      },
      {
        "status": "affected",
        "version": "<= 1.17.13"
      },
      {
        "status": "affected",
        "version": "< 1.20.0-alpha2"
      }
    ]
  }
]