British mobile ISP SSL MITM attack for the purposes of censorship | Hacker News Reader

British mobile ISP SSL MITM attack for the purposes of censorship

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1 pointShanea935 comments

More about the product: https://umbrella.cisco.com/products/features

Seems like a very misconfigured deployment, since no normal mobile user will use third party CA to connect via Three. I don't expect that this is on purpose.

When they did them same thing at OpenDNS (https://www.snip2code.com/Snippet/1503745/opendns-is-man-in-...) the certificate was valid only for 3 days:

        Issuer: CN=Cisco Umbrella Secondary SubCA nyc-SG, O=Cisco
        Validity
            Not Before: Oct 18 20:32:18 2016 GMT
            Not After : Oct 23 20:32:18 2016 GMT

Full disclosure, that's my post, I just thought it would be relevant to your interests. It's deplorable how they're putting tools in place to infringe on the privacy of an entire country using such dangerous tools as _wikipedia_.

Are the certs self-signed?

It doesn't appear so, the certificates appear to be signed by Cisco, presumably on some kind of dedicated hardware firewall designed to filter - but it's entirely possible that the service is being ran by Cisco and they're generating false certificates on-the-fly as part of the interception.

Can you post full data for an example certificate?

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