include::../description.adoc[]

include::../ask-yourself.adoc[]

include::../recommended.adoc[]

== Sensitive Code Example

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file = open("/tmp/temporary_file","w+") # Sensitive
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tmp_dir = os.environ.get('TMPDIR') # Sensitive
file = open(tmp_dir+"/temporary_file","w+")
----

== Compliant Solution

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import tempfile

file = tempfile.TemporaryFile(dir="/tmp/my_subdirectory", mode='"w+") # Compliant
----

== See

* https://www.owasp.org/index.php/Top_10-2017_A5-Broken_Access_Control[OWASP Top 10 2017 Category A5] - Broken Access Control
* https://www.owasp.org/index.php/Top_10-2017_A3-Sensitive_Data_Exposure[OWASP Top 10 2017 Category A3] - Sensitive Data Exposure
* http://cwe.mitre.org/data/definitions/377[MITRE, CWE-377] - Insecure Temporary File
* http://cwe.mitre.org/data/definitions/379[MITRE, CWE-379] - Creation of Temporary File in Directory with Incorrect Permissions
* https://www.owasp.org/index.php/Insecure_Temporary_File[OWASP, Insecure Temporary File]
* https://docs.python.org/3/library/tempfile.html[Python tempfile module]