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ASAR Integrity bypass via filetype confusion in electron

Moderate severity GitHub Reviewed Published Dec 1, 2023 in electron/electron • Updated Dec 7, 2023

Package

npm electron (npm)

Affected versions

< 22.3.24
>= 24.0.0-alpha.1, < 24.8.3
>= 25.0.0-alpha.1, < 25.8.1
>= 26.0.0-alpha.1, < 26.2.1
>= 27.0.0-alpha.1, < 27.0.0-alpha.7
>= 23.0.0-alpha.1, <= 23.3.13

Patched versions

22.3.24
24.8.3
25.8.1
26.2.1
27.0.0-alpha.7

Description

Impact

This only impacts apps that have the embeddedAsarIntegrityValidation and onlyLoadAppFromAsar [fuses] (https://www.electronjs.org/docs/latest/tutorial/fuses) enabled. Apps without these fuses enabled are not impacted. This issue is specific to macOS as these fuses are only currently supported on macOS.

Specifically this issue can only be exploited if your app is launched from a filesystem the attacker has write access too. i.e. the ability to edit files inside the .app bundle on macOS which these fuses are supposed to protect against.

Workarounds

There are no app side workarounds, you must update to a patched version of Electron.

Fixed Versions

  • 27.0.0-alpha.7
  • 26.2.1
  • 25.8.1
  • 24.8.3
  • 23.3.14
  • 22.3.24

For more information

If you have any questions or comments about this advisory, email us at security@electronjs.org

References

@MarshallOfSound MarshallOfSound published to electron/electron Dec 1, 2023
Published to the GitHub Advisory Database Dec 1, 2023
Reviewed Dec 1, 2023
Published by the National Vulnerability Database Dec 1, 2023
Last updated Dec 7, 2023

Severity

Moderate
6.1
/ 10

CVSS base metrics

Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
High
Availability
Low
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:L

Weaknesses

CVE ID

CVE-2023-44402

GHSA ID

GHSA-7m48-wc93-9g85

Source code

Credits

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