Re: Issue with Office365 certificates

Hi,

Damn, it seems that there's a serious issue with OCSP and microsoft
certificates.

You can try to put the option: *OCSPaia* = no to see if it fixes the issue,
but it seems that it needs further investigations.

https://www.stunnel.org/static/stunnel.html

Regards,
Flo

On Fri, Nov 9, 2018 at 12:36 PM <[email protected]> wrote:

> Hello,
>
> I'm encountering an issue while using sTunnel with an Office365 account.
>
> sTunnel worked properly for a few months, while it gived an error with
> certificates since yesterday, whilst didn't change anything in the
> configuration.
>
> This is our configuration:
>
> [pop3s]
> client = yes
> accept = 127.0.0.1:2001
> connect = outlook.office365.com:995
> CAfile = C:\Program Files (x86)\stunnel\config\ca-certs.pem
> checkHost = outlook.office365.com
> verifyChain = yes
> OCSPaia = yes
>
> This is what we get in the log:
>
> 2018.11.09 11:34:09 LOG7[main]: Found 1 ready file descriptor(s)
> 2018.11.09 11:34:09 LOG7[main]: FD=432 ifds=r-x ofds=---
> 2018.11.09 11:34:09 LOG7[main]: Service [pop3s] accepted (FD=672) from
> 127.0.0.1:49619
> 2018.11.09 11:34:09 LOG7[main]: Creating a new thread
> 2018.11.09 11:34:09 LOG7[main]: New thread created
> 2018.11.09 11:34:09 LOG7[30]: Service [pop3s] started
> 2018.11.09 11:34:09 LOG7[30]: Setting local socket options (FD=672)
> 2018.11.09 11:34:09 LOG7[30]: Option TCP_NODELAY set on local socket
> 2018.11.09 11:34:09 LOG5[30]: Service [pop3s] accepted connection from
> 127.0.0.1:49619
> 2018.11.09 11:34:09 LOG6[30]: failover: priority, starting at entry #0
> 2018.11.09 11:34:09 LOG6[30]: s_connect: connecting 40.101.9.178:995
> 2018.11.09 11:34:09 LOG7[30]: s_connect: s_poll_wait 40.101.9.178:995:
> waiting 10 seconds
> 2018.11.09 11:34:09 LOG5[30]: s_connect: connected 40.101.9.178:995
> 2018.11.09 11:34:09 LOG5[30]: Service [pop3s] connected remote server from
> 172.31.20.23:49620
> 2018.11.09 11:34:09 LOG7[30]: Setting remote socket options (FD=668)
> 2018.11.09 11:34:09 LOG7[30]: Option TCP_NODELAY set on remote socket
> 2018.11.09 11:34:09 LOG7[30]: Remote descriptor (FD=668) initialized
> 2018.11.09 11:34:09 LOG6[30]: SNI: sending servername:
> outlook.office365.com
> 2018.11.09 11:34:09 LOG6[30]: Peer certificate required
> 2018.11.09 11:34:09 LOG7[30]: TLS state (connect): before/connect
> initialization
> 2018.11.09 11:34:09 LOG7[30]: TLS state (connect): SSLv2/v3 write client
> hello A
> 2018.11.09 11:34:09 LOG7[30]: TLS state (connect): SSLv3 read server hello
> A
> 2018.11.09 11:34:09 LOG7[30]: Verification started at depth=2: C=US,
> O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Global Root CA
> 2018.11.09 11:34:09 LOG7[30]: CERT: Pre-verification succeeded
> 2018.11.09 11:34:09 LOG7[30]: OCSP: Ignoring root certificate
> 2018.11.09 11:34:09 LOG6[30]: Certificate accepted at depth=2: C=US,
> O=DigiCert Inc, OU=www.digicert.com, CN=DigiCert Global Root CA
> 2018.11.09 11:34:09 LOG7[30]: Verification started at depth=1: C=US,
> O=DigiCert Inc, CN=DigiCert Cloud Services CA-1
> 2018.11.09 11:34:09 LOG7[30]: CERT: Pre-verification succeeded
> 2018.11.09 11:34:09 LOG5[30]: OCSP: Connecting the AIA responder "
> http://ocsp.digicert.com"
> 2018.11.09 11:34:09 LOG6[30]: s_connect: connecting 93.184.220.29:80
> 2018.11.09 11:34:09 LOG7[30]: s_connect: s_poll_wait 93.184.220.29:80:
> waiting 10 seconds
> 2018.11.09 11:34:09 LOG5[30]: s_connect: connected 93.184.220.29:80
> 2018.11.09 11:34:09 LOG7[30]: OCSP: Connected ocsp.digicert.com:80
> 2018.11.09 11:34:09 LOG7[30]: OCSP: Response received
> 2018.11.09 11:34:09 LOG6[30]: OCSP: Status: good
> 2018.11.09 11:34:09 LOG6[30]: OCSP: This update: Nov 9 00:00:00 2018 GMT
> 2018.11.09 11:34:09 LOG6[30]: OCSP: Next update: Nov 16 00:00:00 2018 GMT
> 2018.11.09 11:34:09 LOG5[30]: OCSP: Certificate accepted
> 2018.11.09 11:34:09 LOG6[30]: Certificate accepted at depth=1: C=US,
> O=DigiCert Inc, CN=DigiCert Cloud Services CA-1
> 2018.11.09 11:34:09 LOG7[30]: Verification started at depth=0: C=US,
> ST=Washington, L=Redmond, O=Microsoft Corporation, CN=outlook.com
> 2018.11.09 11:34:09 LOG7[30]: CERT: Pre-verification succeeded
> 2018.11.09 11:34:09 LOG6[30]: CERT: Host name "outlook.office365.com"
> matched with "*.office365.com"
> 2018.11.09 11:34:09 LOG5[30]: OCSP: Connecting the AIA responder "
> http://ocspx.digicert.com"
> 2018.11.09 11:34:09 LOG6[30]: s_connect: connecting 93.184.220.29:80
> 2018.11.09 11:34:09 LOG7[30]: s_connect: s_poll_wait 93.184.220.29:80:
> waiting 10 seconds
> 2018.11.09 11:34:09 LOG5[30]: s_connect: connected 93.184.220.29:80
> 2018.11.09 11:34:09 LOG7[30]: OCSP: Connected ocspx.digicert.com:80
> 2018.11.09 11:34:09 LOG7[30]: OCSP: Response received
> 2018.11.09 11:34:09 LOG3[30]: OCSP: Responder error: 6: unauthorized
> 2018.11.09 11:34:09 LOG4[30]: Rejected by OCSP at depth=0: C=US,
> ST=Washington, L=Redmond, O=Microsoft Corporation, CN=outlook.com
> 2018.11.09 11:34:09 LOG7[30]: TLS alert (write): fatal: handshake failure
> 2018.11.09 11:34:09 LOG3[30]: SSL_connect: 14090086: error:14090086:SSL
> routines:ssl3_get_server_certificate:certificate verify failed
> 2018.11.09 11:34:09 LOG5[30]: Connection reset: 0 byte(s) sent to TLS, 0
> byte(s) sent to socket
> 2018.11.09 11:34:09 LOG7[30]: Deallocating application specific data for
> session connect address
> 2018.11.09 11:34:09 LOG7[30]: Remote descriptor (FD=668) closed
> 2018.11.09 11:34:09 LOG7[30]: Local descriptor (FD=672) closed
> 2018.11.09 11:34:09 LOG7[30]: Service [pop3s] finished (0 left)
>
>
> Can you please help me?
>
> Thanks in advance!
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