[asterisk-dev] Dialstring injection - security advisory release?
Nick Lewis
Nick.Lewis at atltelecom.com
Thu Feb 11 07:39:16 CST 2010
> I think it would be good for the Asterisk project if we put
> out a more official document with a security advisory about
> this security issue.
+1
> The advisory document needs a few examples using CUT, FILTER
> and possibly REGEX as well.
I think these are just expeditious workarounds until the bug is fixed.
It should never be acceptable for a programming language (including the
dialplan language) to permit the content of a variable to execute code
when it is being passed to a function.
The & character is the dialplan language token that identifies an array
so I think it must be escaped as part of the language and not manually
by the programmer
-- N_L
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