CVE-2021-21334 environment variable leak

2021-03-1021:30:18

CWE-668

GitHub_M

www.cve.org

6.3 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

NONE

Availability Impact

NONE

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

6.7 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

47.0%

JSON

In containerd (an industry-standard container runtime) before versions 1.3.10 and 1.4.4, containers launched through containerd’s CRI implementation (through Kubernetes, crictl, or any other pod/container client that uses the containerd CRI service) that share the same image may receive incorrect environment variables, including values that are defined for other containers. If the affected containers have different security contexts, this may allow sensitive information to be unintentionally shared. If you are not using containerd’s CRI implementation (through one of the mechanisms described above), you are not vulnerable to this issue. If you are not launching multiple containers or Kubernetes pods from the same image which have different environment variables, you are not vulnerable to this issue. If you are not launching multiple containers or Kubernetes pods from the same image in rapid succession, you have reduced likelihood of being vulnerable to this issue This vulnerability has been fixed in containerd 1.3.10 and containerd 1.4.4. Users should update to these versions.

CNA Affected

[
  {
    "product": "containerd",
    "vendor": "containerd",
    "versions": [
      {
        "status": "affected",
        "version": "< 1.3.10"
      },
      {
        "status": "affected",
        "version": ">= 1.4.0, < 1.4.4"
      }
    ]
  }
]