bpo-47194: Update zlib to v1.2.12 on Windows to resolve CVE-2018-25032 (GH-32241)

(cherry picked from commit 6066739)

Co-authored-by: Zachary Ware <[email protected]>

Author: miss-islington

Misc/NEWS.d/next/Windows/2022-04-01-14-57-40.bpo-47194.IB0XL4.rst

@@ -0,0 +1 @@
+Update ``zlib`` to v1.2.12 to resolve CVE-2018-25032.

PCbuild/get_externals.bat

@@ -59,7 +59,7 @@ if NOT "%IncludeTkinterSrc%"=="false" set libraries=%libraries% tcl-core-8.6.12.
 if NOT "%IncludeTkinterSrc%"=="false" set libraries=%libraries% tk-8.6.12.0
 if NOT "%IncludeTkinterSrc%"=="false" set libraries=%libraries% tix-8.4.3.6
 set libraries=%libraries%                                       xz-5.2.2
-set libraries=%libraries%                                       zlib-1.2.11
+set libraries=%libraries%                                       zlib-1.2.12
 
 for %%e in (%libraries%) do (
     if exist "%EXTERNALS_DIR%\%%e" (

PCbuild/python.props

@@ -67,7 +67,7 @@
     <opensslOutDir>$(ExternalsDir)openssl-bin-1.1.1n\$(ArchName)\</opensslOutDir>
     <opensslIncludeDir>$(opensslOutDir)include</opensslIncludeDir>
     <nasmDir>$(ExternalsDir)\nasm-2.11.06\</nasmDir>
-    <zlibDir>$(ExternalsDir)\zlib-1.2.11\</zlibDir>
+    <zlibDir>$(ExternalsDir)\zlib-1.2.12\</zlibDir>
 
     <!-- Suffix for all binaries when building for debug -->
     <PyDebugExt Condition="'$(PyDebugExt)' == '' and $(Configuration) == 'Debug'">_d</PyDebugExt>