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[security] bpo-13617: Reject embedded null characters in wchar* strings. (#2302)

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Based on patch by Victor Stinner.

Add private C API function _PyUnicode_AsUnicode() which is similar to
PyUnicode_AsUnicode(), but checks for null characters.
This commit is contained in:
Serhiy Storchaka 2017-06-28 08:30:06 +03:00 • committed by GitHub
parent 592eda1233
commit f7eae0adfc
22 changed files with 115 additions and 23 deletions
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4
Python/dynload_win.c
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@ -190,13 +190,13 @@ dl_funcptr _PyImport_FindSharedFuncptrWindows(const char *prefix,
{
dl_funcptr p;
char funcname[258], *import_python;
wchar_t *wpathname;
const wchar_t *wpathname;
#ifndef _DEBUG
_Py_CheckPython3();
#endif
wpathname = PyUnicode_AsUnicode(pathname);
wpathname = _PyUnicode_AsUnicode(pathname);
if (wpathname == NULL)
return NULL;