CVE-2024-27303: electron-userland electron-builder Untrusted Search Path

Vulnerability summary

CVE-2024-27303 is a high (CVSS 7.3) Untrusted Search Path vulnerability in electron-userland electron-builder. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 19.4% of scored vulnerabilities.

Timeline

1. 06-03-2024
   PublishedVulnerability first disclosed.
2. 13-08-2024
   Last modifiedVulnerability information updated.

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.

• CWE-426Untrusted Search PathThe product searches for critical resources using an externally-supplied search path that can point to resources that are not under the product's direct control.
• CWE-427Uncontrolled Search Path ElementThe product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors.