The FakeFile implementation in the sandbox environment in the Google
App Engine Python SDK before 1.5.4 does not properly control the
opening of files, which allows local users to bypass intended access
restrictions and create arbitrary files via ALLOWED_MODES and
ALLOWED_DIRS changes within the code parameter to
_ah/admin/interactive/execute, a different vulnerability than
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the CVE-ID was allocated or reserved, and does not
necessarily indicate when this vulnerability was
discovered, shared with the affected vendor, publicly
disclosed, or updated in CVE.
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