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CVE-2024-27303

HIGH
Published 2024-03-06T18:35:37.973Z
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CVSS Score

V3.1
7.3
/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Base Score Metrics
Exploitability: N/A Impact: N/A

EPSS Score

v2025.03.14
0.001
probability
of exploitation in the wild

There is a 0.1% chance that this vulnerability will be exploited in the wild within the next 30 days.

Updated: 2025-06-25
Exploit Probability
Percentile: 0.192
Higher than 19.2% of all CVEs

Attack Vector Metrics

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
REQUIRED
Scope
UNCHANGED

Impact Metrics

Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Description

electron-builder is a solution to package and build a ready for distribution Electron, Proton Native app for macOS, Windows and Linux. A vulnerability that only affects eletron-builder prior to 24.13.2 in Windows, the NSIS installer makes a system call to open cmd.exe via NSExec in the `.nsh` installer script. NSExec by default searches the current directory of where the installer is located before searching `PATH`. This means that if an attacker can place a malicious executable file named cmd.exe in the same folder as the installer, the installer will run the malicious file. Version 24.13.2 fixes this issue. No known workaround exists. The code executes at the installer-level before the app is present on the system, so there's no way to check if it exists in a current installer.

Available Exploits

No exploits available for this CVE.

Related News

No news articles found for this CVE.

Affected Products

electron-userland

electron-builder

Affected Versions:

< 24.13.2
electron

electron-builder

Affected Versions:

0

GitHub Security Advisories

Community-driven vulnerability intelligence from GitHub

✓ GitHub Reviewed HIGH

electron-builder's NSIS installer - execute arbitrary code on the target machine (Windows only)

GHSA-r4pf-3v7r-hh55

Advisory Details

### Impact Windows-Only: The NSIS installer makes a system call to open cmd.exe via NSExec in the `.nsh` installer script. NSExec by default searches the current directory of where the installer is located before searching `PATH`. This means that if an attacker can place a malicious executable file named cmd.exe in the same folder as the installer, the installer will run the malicious file. ### Patches Fixed in https://github.com/electron-userland/electron-builder/pull/8059 ### Workarounds None, it executes at the installer-level before the app is present on the system, so there's no way to check if it exists in a current installer. ### References https://cwe.mitre.org/data/definitions/426.html https://cwe.mitre.org/data/definitions/427

Affected Packages

npm app-builder-lib
ECOSYSTEM: ≥0 <24.13.2

CVSS Scoring

CVSS Score

7.5

CVSS Vector

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

References

WEB https://github.com/electron-userland/electron-builder/security/advisories/GHSA-r4pf-3v7r-hh55
ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2024-27303
WEB https://github.com/electron-userland/electron-builder/pull/8059
WEB https://github.com/electron-userland/electron-builder/commit/8f4acff3c2d45c1cb07779bb3fe79644408ee387
PACKAGE https://github.com/electron-userland/electron-builder

Advisory provided by GitHub Security Advisory Database. Published: March 4, 2024, Modified: March 6, 2024

References

https://github.com/electron-userland/electron-builder/security/advisories/GHSA-r4pf-3v7r-hh55
https://github.com/electron-userland/electron-builder/pull/8059
https://github.com/electron-userland/electron-builder/commit/8f4acff3c2d45c1cb07779bb3fe79644408ee387
Published: 2024-03-06T18:35:37.973Z
Last Modified: 2024-08-13T17:12:24.776Z
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