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Intercepting data on Android Device

Joshua | Last updated: Jul 04, 2018 12:37PM UTC

Hello, Please can someone help me with the following: I am trying to use Burp Suite to see my network traffic on my mobile device however when I connect it I can see the request in the Burp Suite however my phone will not connect to any web pages including HTTP or HTTPS. In the "Alerts" tab I have the following error: [10] The client failed to negotiate an SSL connection to (website):443 Received fatal alert: certificate_unknown I have downloaded the cacert on the device, renamed it to cacert.cer and installed however this didn't help. I have opened the ports on my Router, I am not sure if that will make a difference. I have tried other mobile devices with and they have the same symptoms Any help would be much appreciated. Thanks in advance.

Liam, PortSwigger Agent | Last updated: Jul 04, 2018 01:09PM UTC

Have you checked out this troubleshooting article? - https://blog.ropnop.com/configuring-burp-suite-with-android-nougat/ Please let us know if you need any further assistance.

Burp User | Last updated: Jul 04, 2018 05:19PM UTC

Thanks for your quick response. That information is much appreciated however unfortunately I don't seem to be able to rename the cacert using OPENSSL. I am able to convert the cacert from DER to PEM using the command in the article, however the following command does not work for me: openssl x509 -inform PEM -subject_hash_old -in cacert.pem |head -1 I receive the following error: OpenSSL> x509 -inform PEM -subject_hash_old -in cacert.pem |head -1 x509: Unknown parameter |head x509: Use -help for summary. error in x509 I understand this is probably beyond when support you can provide as it's 3rd party software but if you have any advice it would be much appreciated. Thanks again.

Burp User | Last updated: Jul 04, 2018 05:50PM UTC

Just to update, I have now resolved the issue. Thanks

Liam, PortSwigger Agent | Last updated: Jul 05, 2018 06:58AM UTC

Good job resolving your issue Joshua.

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