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cveRedhatCVE-2021-20182
HistoryFeb 23, 2021 - 10:15 p.m.

CVE-2021-20182

2021-02-2322:15:12
CWE-552
redhat
web.nvd.nist.gov
128
3
cve-2021-20182
openshift
docker builder
privilege escalation
cluster admin
data confidentiality
data integrity
system availability

CVSS2

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS3

8.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

9

Confidence

High

EPSS

0.001

Percentile

37.0%

A privilege escalation flaw was found in openshift4/ose-docker-builder. The build container runs with high privileges using a chrooted environment instead of runc. If an attacker can gain access to this build container, they can potentially utilize the raw devices of the underlying node, such as the network and storage devices, to at least escalate their privileges to that of the cluster admin. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Affected configurations

Nvd
Vulners
Node
redhatopenshift_container_platformRange4.4–4.4.33
OR
redhatopenshift_container_platformRange4.5–4.5.30
OR
redhatopenshift_container_platformRange4.6–4.6.15
VendorProductVersionCPE
redhatopenshift_container_platform*cpe:2.3:a:redhat:openshift_container_platform:*:*:*:*:*:*:*:*

CNA Affected

[
  {
    "product": "openshift",
    "vendor": "n/a",
    "versions": [
      {
        "status": "affected",
        "version": "github.com/openshift/builder v0.0.0-20210118193943-6d10f5202a76"
      }
    ]
  }
]

Social References

More

CVSS2

6.5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

PARTIAL

Integrity Impact

PARTIAL

Availability Impact

PARTIAL

AV:N/AC:L/Au:S/C:P/I:P/A:P

CVSS3

8.8

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

AI Score

9

Confidence

High

EPSS

0.001

Percentile

37.0%

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