[sr-dev] [tracker] Task opened: Segfault in ims_auth's ims_proxy_authenticate function when IMPU != IMPI (Attachment added)

[sip-router]

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A new Flyspray task has been opened.  Details are below. 

User who did this - Camille Oudot (coudot) 

Attached to Project - sip-router
Summary - Segfault in ims_auth's ims_proxy_authenticate function when IMPU != IMPI
Task Type - Bug Report
Category - Module
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Medium
Priority - Normal
Reported Version - Development
Due in Version - Undecided
Due Date - Undecided
Details - If a client sends an INVITE with no Proxy-Authorization header, and this request is challenged using ims_proxy_authenticate(), ims_auth module tries to use the address in From header as IMPI for the MAR diameter request.
When IMPI != IMPU, the HSS replies with an error code since the user cannot be found. In that case the SIP-Auth-Data-Item AVP isn't found in the MAA answer, and avlist is never initialized in async_cdp_callback().
Adding a safety check in the "done" section prevented the crash to occur (see attached patch).

One or more files have been attached.

More information can be found at the following URL:
http://sip-router.org/tracker/index.php?do=details&task_id=304

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