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I have the following code in which API is taking file name as input.
I tried validating its extension, Its path and some special characters (".."). Why is the error still showing after all these checks. What am i missing?
@SChalla484906 (Community Member) ,
Please refer following article - that describes useful approaches to deal with CWE-73.
https://www.veracode.com/security/dotnet/cwe-73
If this is useful, mark this as best answer.
Thanks for the response.
I have gone through the above link earlier and tried those validations but couldn't succeed. Please find the attached screenshot.
There is a comment from other thread which i have quoted below(https://community.veracode.com/s/question/0D53n00007siYf0CAE/systemiofiledeletepath-getting-external-control-of-file-name-or-path-cwe-id-73-directory-traversal-please-let-me-know-how-to-fix-it) .
"Please note that the only remediation Veracode Static Analysis accepts for CWE 73 is a hardcoded path or validation against a strict allow-list. This means that, once proper validation is in place, you may need to propose a mitigation (https://help.veracode.com/r/improve_mitigation) and contact your security team for mitigation review."
Does it mean veracode static analysis doenst consider other validations?
Yes, in this scenario we need to apply mitigation in order to close the task.
Hi @HemantShah (Community Member) ,
I am following this link https://help.veracode.com/r/t_annotate_net to write custom cleanser.
Please clarify my below doubts
Hi @SChalla484906 (Community Member) ,
Please refer the custom cleanser administration in following link.
https://help.veracode.com/r/c_cleanser_admin