ghsa-rf39-3f98-xr7r
Vulnerability from github
Summary
Burn uses an unprotected C:\Windows\Temp directory to copy binaries and run them from there. This directory is not entirely protected against low privilege users.
Details
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.
icacls c:\windows\temp
BUILTIN\Users:(CI)(S,WD,AD,X) BUILTIN\Administrators:(F) BUILTIN\Administrators:(OI)(CI)(IO)(F) NT AUTHORITY\SYSTEM:(F) NT AUTHORITY\SYSTEM:(OI)(CI)(IO)(F) CREATOR OWNER:(OI)(CI)(IO)(F)
Built in users(non-administrators) have special permissions to this folder and can create files and write to this directory. While they do not have explicit read permissions, there is a way they can monitor the changes to this directory using ReadDirectoryChangesW API and thus figure out randomized folder names created inside this directory as wel
PoC
PoC works against the against visual studio enterprise with update 3 installer
Reproduction steps
As a standard user, run the poc. Mount the iso and run visual studio installer as local system account. The PoC should hijack the the binaries dropped by vs installer and a child process "notepad.exe" will be running.
Impact
This is an Elevation of Privilege Vulnerability where a low privileged user can hijack binaries in an unprotected path C:\Windows\Temp to elevate to the SYSTEM user privileges.
{
"affected": [
{
"package": {
"ecosystem": "NuGet",
"name": "wix"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "3.14.1"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "NuGet",
"name": "wix"
},
"ranges": [
{
"events": [
{
"introduced": "4.0.0"
},
{
"fixed": "4.0.5"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "NuGet",
"name": "WixToolset.Sdk"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "4.0.5"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2024-29187"
],
"database_specific": {
"cwe_ids": [
"CWE-732"
],
"github_reviewed": true,
"github_reviewed_at": "2024-03-25T19:42:32Z",
"nvd_published_at": "2024-03-24T20:15:08Z",
"severity": "HIGH"
},
"details": "### Summary\nBurn uses an unprotected C:\\Windows\\Temp directory to copy binaries and run them from there. This directory is not entirely protected against low privilege users. \n\n### Details\nWhen 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\u0027s loaded in the application resulting in elevation of privileges.\n\nicacls c:\\windows\\temp\n\n **BUILTIN\\Users:(CI)(S,WD,AD,X)** \nBUILTIN\\Administrators:(F)\nBUILTIN\\Administrators:(OI)(CI)(IO)(F)\nNT AUTHORITY\\SYSTEM:(F)\nNT AUTHORITY\\SYSTEM:(OI)(CI)(IO)(F)\n CREATOR OWNER:(OI)(CI)(IO)(F)\n \nBuilt in users(non-administrators) have special permissions to this folder and can create files and write to this directory. While they do not have explicit read permissions, there is a way they can monitor the changes to this directory using ReadDirectoryChangesW API and thus figure out randomized folder names created inside this directory as wel\n\u00a0\n\n### PoC\n\n PoC works against the against visual studio enterprise with update 3 [installer ](https://myvs.download.prss.microsoft.com/dbazure/en_visual_studio_enterprise_2015_with_update_3_x86_x64_dvd_8923288.iso?t=8132cd54-4b83-4478-8b73-fd9eb93437bf\u0026P1=1709239640\u0026P2=601\u0026P3=2\u0026P4=iorgKPv%2bG8n2NANTPUVoB92rr8t3W4XM594%2f9BtQQJrYrr8SwxGDxV%2fj%2f2F6Ulto0bXrIaFoZUr4yV37YAsOZVpM29IMtQEO0673AbDVuTe93qDb6wb7xdlpZSse0LZURUwwIFw5cwHQS2ZtvkunXE0osgXtEBT2IzVbPwVH39%2fum854xb4e2Dp61wgNrMZcOLLluBbeA3KX1sP3mm7WAWXBvlFiQWEnTfR5XH5mlLyPy2qfqCXWCjl84jNX7uY%2bpLR1IbfeD2JlcIQNeW2QrvmmqRrRbGvvaCA97IaSjM16XcDqVjvAEGW3sWXUc7y%2fEf68WZIyT7iilaEDUvaqqA%3d%3d\u0026su=1)\n\n#### Reproduction steps\nAs a standard user, run the poc.\nMount the iso and run visual studio installer as local system account.\nThe PoC should hijack the the binaries dropped by vs installer and a child process \"notepad.exe\" will be running.\n\n### Impact\nThis is an Elevation of Privilege Vulnerability where a low privileged user can hijack binaries in an unprotected path C:\\Windows\\Temp to elevate to the SYSTEM user privileges. ",
"id": "GHSA-rf39-3f98-xr7r",
"modified": "2024-03-25T19:42:32Z",
"published": "2024-03-25T19:42:32Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/wixtoolset/issues/security/advisories/GHSA-rf39-3f98-xr7r"
},
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-29187"
},
{
"type": "WEB",
"url": "https://github.com/wixtoolset/wix/commit/75a8c75d4e02ea219008dc5af7d03869291d61f7"
},
{
"type": "WEB",
"url": "https://github.com/wixtoolset/wix3/commit/6d372e5169f1a334a395cdf496443bc0732098e9"
},
{
"type": "PACKAGE",
"url": "https://github.com/wixtoolset/issues"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
],
"summary": "WiX based installers are vulnerable to binary hijack when run as SYSTEM"
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.