Sounds good to me, since this is (a) a security fix that will make some vendors happy, and (b) only a C-level API. I expect that some apps embedding Python will use this API unconditionally and this break with earlier Python versions; this could be intentional because of the vulnerability (else why would they change their code to call the new API), or they can use an #if to check for a version >= 2.6.6. --Guido On Thu, May 20, 2010 at 12:32 PM, Antoine Pitrou <solipsis@pitrou.net> wrote:
Hello,
I would like to check that it's possible to a new C API function in the 2.6 branch, on the basis that it would help solve what seems to be reported as a security problem by several vendors (including Linux distributions) -- see http://bugs.python.org/issue5753 for a thorough discussion.
The change is rather minimal at the code level; it adds a new function PySys_SetArgvEx which has an additional flag telling it whether to update sys.path or not. The existing PySys_SetArgv function unconditionally updates sys.path, which can allow shadowing of stdlib or third-party library modules by an attacker.
Thank you
Antoine.
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