Description
NSIS (Nullsoft Scriptable Install System) 3.06.1 before 3.12 sometimes uses the Low IL temp directory when executing as SYSTEM, allowing local attackers to gain privileges (if they can cause my_GetTempFileName to return 0, as shown in the references).
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Nullsoft Nullsoft Scriptable Install System
Default version status: unaffected
3.06.1 to < 3.12affected
References
- https://nsis.sourceforge.io/Docs/AppendixF.html#v3.12-cl ↗
- https://github.com/NSIS-Dev/nsis/commit/8e6f02205d5f22da6c7855dbfe59b2af667330ca ↗
- https://github.com/NSIS-Dev/nsis/blob/7359413009afd4f0fff472d841fc2f2cc0e0a5f8/Source/exehead/util.c#L475-L484 ↗
- https://learn.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-gettempfilename ↗