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GitHub_MCVELIST:CVE-2020-4076

HistoryJul 07, 2020 - 12:05 a.m.

CVE-2020-4076 Context isolation bypass via leaked cross-context objects in Electron

2020-07-0700:05:21

CWE-501

GitHub_M

www.cve.org

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

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

AI Score

8.9

Confidence

High

EPSS

0.001

Percentile

30.3%

JSON

In Electron before versions 7.2.4, 8.2.4, and 9.0.0-beta21, there is a context isolation bypass. Code running in the main world context in the renderer can reach into the isolated Electron context and perform privileged actions. Apps using contextIsolation are affected. This is fixed in versions 9.0.0-beta.21, 8.2.4 and 7.2.4.

CNA Affected

[
  {
    "product": "electron",
    "vendor": "electron",
    "versions": [
      {
        "status": "affected",
        "version": ">= 9.0.0-beta.0, <= 9.0.0-beta.20"
      },
      {
        "status": "affected",
        "version": ">= 8.0.0, < 8.2.4"
      },
      {
        "status": "affected",
        "version": "< 7.2.4"
      }
    ]
  }
]

References

github.com/electron/electron/security/advisories/GHSA-m93v-9qjc-3g79

www.electronjs.org/releases/stable?page=3#release-notes-for-v824

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

CHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

NONE

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

AI Score

8.9

Confidence

High

EPSS

0.001

Percentile

30.3%

JSON

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