{"id":"GHSA-g4v6-69p6-q3p4","aliases":[],"status":"published","title":"WiX Burn-based bundles are vulnerable to binary hijack when run as SYSTEM","description":"# Summary\n\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\n\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's loaded in the application resulting in elevation of privileges.\n\n```\nicacls c:\\windows\\temp\n\nBUILTIN\\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)\nCREATOR OWNER:(OI)(CI)(IO)(F)\n```\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 \n# PoC\n\nPoC works against the against visual studio enterprise with update 3 installer\n\n## Reproduction steps\n\nAs a standard user, run the poc.\nMount the iso and run visual studio [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)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\n\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.","severity":{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high","from":"ghsa"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2024-03-25T19:36:25Z","modified":"2024-03-25T19:36:26Z","fixes":[{"ecosystem":"NuGet","package":"PanelSwWix4.Sdk","fixed_in":["5.0.0-psw-wix.0265-49"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"NuGet","package":"PanelSwWix4.Sdk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"5.0.0-psw-wix.0262-48"},{"fixed":"5.0.0-psw-wix.0265-49"}]}]},{"source":"osv","ecosystem":"NuGet","package":"PanelSwWix4.Sdk","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.0-psw-wix.0265-49"}]}]}],"references":[{"url":"https://github.com/nirbar/wix4/security/advisories/GHSA-g4v6-69p6-q3p4","tags":["web"]},{"url":"https://github.com/nirbar/wix4/commit/0410df93a5f29e4235b4b78b90a1384ffafd062b","tags":["web"]},{"url":"https://github.com/advisories/GHSA-g4v6-69p6-q3p4"},{"url":"https://github.com/nirbar/wix4","tags":["package"]}],"sources":{"ghsa":[{"id":"GHSA-g4v6-69p6-q3p4","title":"WiX Burn-based bundles are vulnerable to binary hijack when run as SYSTEM ","description":"# Summary\n\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\n\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's loaded in the application resulting in elevation of privileges.\n\n```\nicacls c:\\windows\\temp\n\nBUILTIN\\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)\nCREATOR OWNER:(OI)(CI)(IO)(F)\n```\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 \n# PoC\n\nPoC works against the against visual studio enterprise with update 3 installer\n\n## Reproduction steps\n\nAs a standard user, run the poc.\nMount the iso and run visual studio [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)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\n\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.","status":"published","published":"2024-03-25T19:36:25Z","modified":"2024-03-25T19:36:26Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T14:37:41.821668Z"}],"osv":[{"id":"GHSA-g4v6-69p6-q3p4","title":"WiX Burn-based bundles are vulnerable to binary hijack when run as SYSTEM ","description":"# Summary\n\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\n\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's loaded in the application resulting in elevation of privileges.\n\n```\nicacls c:\\windows\\temp\n\nBUILTIN\\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)\nCREATOR OWNER:(OI)(CI)(IO)(F)\n```\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 \n# PoC\n\nPoC works against the against visual studio enterprise with update 3 installer\n\n## Reproduction steps\n\nAs a standard user, run the poc.\nMount the iso and run visual studio [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)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\n\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.","status":"published","published":"2024-03-25T19:36:25Z","modified":"2024-03-25T19:36:25Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:46:47.119724Z"}]}}