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Mark,

On 2/26/20 09:08, Mark Thomas wrote:
> On 26/02/2020 11:19, Mark Thomas wrote:
>> On 26/02/2020 09:00, Mark Thomas wrote:
>>> On 25/02/2020 21:47, Ellen Meiselman wrote:
>>>> So it turned out that the logs were mostly set at FINE
>>>> already, so
>>> Johann’s suggestion was already done.
>>>>
>>>> But I think I now know where the problem lies. Secure IIS
>>>> request >
>>> to > non-secire AJP.
>>>>
>>>> I don’t think this was a problem on the other servers before
>>>> but the
>>> security has probably been tightened, and it just doesn’t
>>> produce an error - it just won’t allow it.
>>>>
>>>> I have had IIS set to require SSL, but I turned it off to
>>>> test and it
>>> actually worked all the way through to the simple.html file. so
>>> it’s some sort of policy about downgrading - which seems quite
>>> rational in retrospect
>>>
>>> Thanks for the new information.
>>>
>>> That rules out an issue with the secret settings.
>>>
>>> I wonder if IIS (or more likely the ISAPI redirector) is adding
>>> some unexpected request attributes that is triggering the new
>>> protection for CVE-2020-1938. If that is the case, adding the
>>> following to your AJP connector in server.xml should get things
>>> working for SSL as well:
>>>
>>> allowedRequestAttributesPattern=".*"
>>>
>>> Meanwhile, I'll configure my local test environment for IIS
>>> with TLS and see what happens.
>>
>> Confirmed. That is the issue and
>> allowedRequestAttributesPattern=".*" works around it.
>>
>> I need to debug further to find out exactly what the attributes
>> are. I expect we'll add them to the ones Tomcat accepts by
>> default.
>
> Added.
>
> Fixed in: - master for 10.0.0-M2 onwards - 9.0.x for 9.0.32
> onwards - 8.5.x for 8.5.52 onwards - 7.0.x for 7.0.101 onwards
>
> For reference, the IIS specific attributes will be listed in the
> docs. CI version available from:
> https://ci.apache.org/projects/tomcat/tomcat9/docs/config/ajp.html#Sta
ndard_Implementations

Well,
>
@#$*%&. Sorry, IIS folks. I hope we didn't ruin too many nights
and weekends for you. :(

- -chris
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