Re: [squid-users] SSL bump working on most site...cert pinning issue?

On Mon, 2014-06-30 at 22:56 +1000, Dan Charlesworth wrote:
> Yeah, pinned SSL ‘aint gonna be bumped. The Twitter apps are another popular one that use pinning.
>
> As far as your broken_sites ACL goes, you can’t use `dstdomain` because the only thing Squid can see of the destination before bumping an intercepted connection is the IP address. So for `ssl_bump none` you’ll need to be use `dst` ACLs instead.
>
> ProTip: Here are the Apple and Akamai public IP blocks (to use in a dst equivalent of your broken_sites), respectively: 17.0.0.0/8, 23.0.0.0/12.
>
> Good luck
>
> On 30 Jun 2014, at 10:38 pm, James Lay <jlay_at_slave-tothe-box.net> wrote:
>
> > Topic pretty much says it...most sites work fine using my below set up,
> > but some (Apple's app store) do not. I'm wondering if cert pinning is
> > the issue? Since this set up is basically two separate sessions, I
> > packet captured both. The side the I have control over gives me a TLS
> > Record Layer Alert Close Notify. I am unable to decrypt the other side
> > as the device in question is an iDevice and I can't capture the master
> > secret.
> >
> > I've even tried to ACL certain sites to not bump, but they don't go
> > through. Below is my complete setup. This is running the below:
> >
> > Squid Cache: Version 3.4.6
> > configure options: '--prefix=/opt' '--enable-icap-client'
> > '--enable-ssl' '--enable-linux-netfilter'
> > '--enable-follow-x-forwarded-for' '--with-large-files'
> > '--sysconfdir=/opt/etc/squid'
> >
> >
> > Any assistance with troubleshooting would be wonderful...thank you.
> >
> > James
> >
> >
> >
> > $IPTABLES -t nat -A PREROUTING -i eth0 -s 192.168.1.96/28 -p tcp --dport
> > 80 -j REDIRECT --to-port 3128
> > $IPTABLES -t nat -A PREROUTING -i eth0 -s 192.168.1.96/28 -p tcp --dport
> > 443 -j REDIRECT --to-port 3129
> >
> >
> > acl localnet src 192.168.1.0/24
> >
> > acl SSL_ports port 443
> > acl Safe_ports port 80 # http
> > acl Safe_ports port 21 # ftp
> > acl Safe_ports port 443 # https
> > acl Safe_ports port 70 # gopher
> > acl Safe_ports port 210 # wais
> > acl Safe_ports port 1025-65535 # unregistered ports
> > acl Safe_ports port 280 # http-mgmt
> > acl Safe_ports port 488 # gss-http
> > acl Safe_ports port 591 # filemaker
> > acl Safe_ports port 777 # multiling http
> >
> > acl CONNECT method CONNECT
> > acl broken_sites dstdomain textnow.me
> > acl broken_sites dstdomain akamaiedge.net
> > acl broken_sites dstdomain akamaihd.net
> > acl broken_sites dstdomain apple.com
> > acl allowed_sites url_regex "/opt/etc/squid/url.txt"
> > acl all_others dst all
> > acl SSL method CONNECT
> >
> >
> > http_access deny !Safe_ports
> > http_access deny CONNECT !SSL_ports
> >
> > http_access allow manager localhost
> > http_access deny manager
> >
> > http_access allow allowed_sites
> > http_access deny all_others
> > http_access allow localnet
> > http_access allow localhost
> >
> > http_access deny all
> > icp_access deny all
> >
> > sslproxy_cert_error allow broken_sites
> > sslproxy_cert_error deny all
> >
> > sslproxy_options ALL
> > ssl_bump none broken_sites
> > ssl_bump server-first all
> >
> > http_port 192.168.1.253:3128 intercept
> > https_port 192.168.1.253:3129 intercept ssl-bump
> > generate-host-certificates=on cert=/opt/sslsplit/sslsplit.crt
> > key=/opt/sslsplit/sslsplitca.key options=ALL sslflags=NO_SESSION_REUSE
> >
> > always_direct allow all
> >
> >
> > hierarchy_stoplist cgi-bin ?
> >
> > access_log syslog:daemon.info common
> >
> > refresh_pattern ^ftp: 1440 20% 10080
> > refresh_pattern ^gopher: 1440 0% 1440
> > refresh_pattern -i (cgi-bin|\?) 0 0% 0
> > refresh_pattern . 0 20% 4320
> >
> > icp_port 3130
> >
> > coredump_dir /opt/var
> >
> >

So adding:

acl broken_sites dst 23.0.0.0/12

now gives me the below:

Jun 30 20:16:51 gateway (squid-1): 192.168.1.100 - -
[30/Jun/2014:20:16:51 -0600] "CONNECT 23.204.162.217:443 HTTP/1.1" 403
3385 TCP_DENIED:HIER_NONE
Jun 30 20:16:51 gateway (squid-1): 192.168.1.100 - -
[30/Jun/2014:20:16:51 -0600] "NONE error:invalid-request HTTP/0.0" 400
3981 TAG_NONE:HIER_NONE

So something is off. Any help on these beastie? Thank you.

James
Received on Tue Jul 01 2014 - 02:21:44 MDT