[netsa-tools-discuss] super_mediator outputs broken JSON

[Matt Coates]

Hi Leigh,

Thanks for reporting this issue.  A fix should be available in the next version of Super Mediator.  If you’re interested in testing a pre-release patch, let me know and that can be provided.  Additionally, if you have additional pcap or ipfix you can send us to validate the fix, it would be greatly appreciated.

Matt Coates
CERT
Software Engineering Institute
Carnegie Mellon University



From: netsa-tools-discuss-bounces+mfcoates=cert.org at cert.org <netsa-tools-discuss-bounces+mfcoates=cert.org at cert.org> On Behalf Of Porter, Leigh
Sent: Monday, November 4, 2019 11:28 AM
To: netsa-tools-discuss at cert.org
Subject: [netsa-tools-discuss] super_mediator outputs broken JSON

Hey All,

It seems that super_mediator is breaking some JSON output, here is an example:

This is a single flow record from yaf into super_mediator:

{"flows":{"flowStartMilliseconds":"2019-10-14 09:49:16.230","flowEndMilliseconds":"2019-10-14 09:50:43.138","flowDurationMilliseconds":86.908,"reverseFlowDeltaMilliseconds":0.031,"protocolIdentifier":6,"sourceIPv4Address":"10.137.137.132","sourceTransportPort":55912,"packetTotalCount":10,"octetTotalCount":756,"flowAttributes":"00","sourceMacAddress":"00:00:00:00:00:00","destinationIPv4Address":"13.225.84.145","destinationTransportPort":443,"reversePacketTotalCount":11,"reverseOctetTotalCount":5682,"reverseFlowAttributes":"00","destinationMacAddress":"00:00:00:00:00:00","initialTCPFlags":"S","unionTCPFlags":"APRF","reverseInitialTCPFlags":"AS","reverseUnionTCPFlags":"APF","tcpSequenceNumber":"0x459881a3","reverseTcpSequenceNumber":"0xe6764318","ingressInterface":0,"egressInterface":0,"vlanId":"0x000","silkAppLabel":443,"ipClassOfService":"0x00","flowEndReason":"","collectorName":"C1","sslCertList":[{"sslCertIssuer":{"sslCertIssuerCountryName":"US","sslCertIssuerOrgName":"DigiCert Inc","sslCertIssuerCommonName":"DigiCert Global CA G2","sslCertIssuerOrgUnitName":[]},"sslCertSubject":{"sslCertSubCountryName":"US","sslCertSubState":"Washington","sslCertSubLocalityName":"Seattle","sslCertSubOrgName":"Amazon.com, Inc.","sslCertSubCommonName":"*.cloudfront.net","sslCertSubjectOrgUnitName":[]},"sslCertVersion":2,"sslCertSerialNumber":"09 f4 da 45 55 23 f0 34 18 b0 55 7e 6d ce c0 11","sslCertValidityNotBefore":"190717000000Z","sslCertValidityNotAfter":"200705120000Z","sslPublicKeyLength":271,"sslExtensions":{}},{"sslCertIssuer":{"sslCertIssuerCountryName":"US","sslCertIssuerOrgName":"DigiCert Inc","sslCertIssuerCommonName":"DigiCert Global Root G2","sslCertIssuerOrgUnitName":["www.digicert.com<http://www.digicert.com>"]},"sslCertSubject":{"sslCertSubCountryName":"US","sslCertSubOrgName":"DigiCert Inc","sslCertSubCommonName":"DigiCert Global CA G2","sslCertSubjectOrgUnitName":[]},"sslCertVersion":2,"sslCertSerialNumber":"0c 8e e0 c9 0d 6a 89 15 88 04 06 1e e2 41 f9 af","sslCertValidityNotBefore":"130801120000Z","sslCertValidityNotAfter":"280801120000Z","sslPublicKeyLength":271,"sslExtensions":{}},"sslCertVersion":2,"sslCertSerialNumber":"63 18 0d 38 fb 80 97 78 a9 d0 35 a3 16 18 f8 40"}],"sslServerCipher":49199,"sslClientVersion":3,"sslRecordVersion":771,"sslServerName":"d3c3cq33003psk.cloudfront.net"}}


However, pipe that into something like 'jq' and you will see this:

parse error: ':' not as part of an object at line 1, column 2115

If you remove the last occurrence of ","sslExtensions":{}}" then all is fine.

This feature seems to pop up fairly regularly on lots of flows..




Leigh Porter
Managing Consultant
Roke Manor Research Limited
leigh.porter at roke.co.uk<mailto:leigh.porter at roke.co.uk>

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