CVE-2019-11251 kubectl cp allows symlink directory traversal

2020-02-0315:35:13

CWE-61

kubernetes

www.cve.org

4.8 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

6 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

19.5%

JSON

The Kubernetes kubectl cp command in versions 1.1-1.12, and versions prior to 1.13.11, 1.14.7, and 1.15.4 allows a combination of two symlinks provided by tar output of a malicious container to place a file outside of the destination directory specified in the kubectl cp invocation. This could be used to allow an attacker to place a nefarious file using a symlink, outside of the destination tree.

CNA Affected

[
  {
    "product": "Kubernetes",
    "vendor": "Kubernetes",
    "versions": [
      {
        "status": "affected",
        "version": "prior to 1.13.11"
      },
      {
        "status": "affected",
        "version": "prior to 1.14.7"
      },
      {
        "status": "affected",
        "version": "prior to 1.15.4"
      },
      {
        "status": "affected",
        "version": "1.1"
      },
      {
        "status": "affected",
        "version": "1.2"
      },
      {
        "status": "affected",
        "version": "1.3"
      },
      {
        "status": "affected",
        "version": "1.4"
      },
      {
        "status": "affected",
        "version": "1.5"
      },
      {
        "status": "affected",
        "version": "1.6"
      },
      {
        "status": "affected",
        "version": "1.7"
      },
      {
        "status": "affected",
        "version": "1.8"
      },
      {
        "status": "affected",
        "version": "1.9"
      },
      {
        "status": "affected",
        "version": "1.10"
      },
      {
        "status": "affected",
        "version": "1.11"
      },
      {
        "status": "affected",
        "version": "1.12"
      }
    ]
  }
]