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How many InCommon SPs are probably insecure in this fashion? Does InCommon insert WantAssertionsSigned="true" into the metadata automatically or does it have anything else that would protect against such a SP? Would it be a good idea when releasing attributes
to a new Service Provider to test forcing both values to false, after checking the metadata and see if the application sign-in works or not?</div>
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<div><span id="ms-rterangepaste-start"></span><span style="font-family:arial,helvetica,sans-serif; font-size:13px; line-height:16.003px">Roberto Ullfig - rullfig@uic.edu</span><br style="font-family:arial,helvetica,sans-serif; font-size:13px; line-height:16.003px">
<span style="font-family:arial,helvetica,sans-serif; font-size:13px; line-height:16.003px">Systems Administrator</span><br style="font-family:arial,helvetica,sans-serif; font-size:13px; line-height:16.003px">
<span style="font-family:arial,helvetica,sans-serif; font-size:13px; line-height:16.003px">Enterprise Architecture and Development | ACCC</span><br style="font-family:arial,helvetica,sans-serif; font-size:13px; line-height:16.003px">
<span style="font-family:arial,helvetica,sans-serif; font-size:13px; line-height:16.003px">University of Illinois - Chicago</span>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> users <users-bounces@shibboleth.net> on behalf of Ullfig, Roberto Alfredo <rullfig@uic.edu><br>
<b>Sent:</b> Friday, May 15, 2020 1:47 PM<br>
<b>To:</b> Shib Users <users@shibboleth.net><br>
<b>Subject:</b> Re: Support for X509SubjectName Name ID</font>
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The two SPs in question actually have WantAssertionsSigned="false" in their metadata.</div>
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<div><span id="x_ms-rterangepaste-start"></span><span style="font-family:arial,helvetica,sans-serif; font-size:13px; line-height:16.003px">Roberto Ullfig - rullfig@uic.edu</span><br style="font-family:arial,helvetica,sans-serif; font-size:13px; line-height:16.003px">
<span style="font-family:arial,helvetica,sans-serif; font-size:13px; line-height:16.003px">Systems Administrator</span><br style="font-family:arial,helvetica,sans-serif; font-size:13px; line-height:16.003px">
<span style="font-family:arial,helvetica,sans-serif; font-size:13px; line-height:16.003px">Enterprise Architecture and Development | ACCC</span><br style="font-family:arial,helvetica,sans-serif; font-size:13px; line-height:16.003px">
<span style="font-family:arial,helvetica,sans-serif; font-size:13px; line-height:16.003px">University of Illinois - Chicago</span>
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<div id="x_divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" color="#000000" style="font-size:11pt"><b>From:</b> users <users-bounces@shibboleth.net> on behalf of Cantor, Scott <cantor.2@osu.edu><br>
<b>Sent:</b> Friday, May 15, 2020 10:38 AM<br>
<b>To:</b> Shib Users <users@shibboleth.net><br>
<b>Subject:</b> Re: Support for X509SubjectName Name ID</font>
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<div class="x_PlainText">On 5/15/20, 11:20 AM, "users on behalf of Ullfig, Roberto Alfredo" <users-bounces@shibboleth.net on behalf of rullfig@uic.edu> wrote:<br>
<br>
> Signing is the default - not following you.<br>
<br>
You said "they worked with signing false and *also* with the defaults". I'm saying, yes, of course they did. If they worked with no signing, they certainly aren't going to notice the signing. The problem is what Steve just reinforced.<br>
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Either the response or the assertion MUST be signed. Signing neither MUST result in an SP failure. A successful outcome is a wide open security breach of that service.<br>
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But just setting both those properties to false doesn't absolutely imply no signing. WantAssertionsSigned="true" in SP metadata could be toggling one of them back on under the covers and obviating the apparent bug. But it gives you the set to triage immediately
and verify whether that might be the case.<br>
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-- Scott<br>
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