Ericsson Expired Software Certificates Behind O2 and SoftBank Network Outages

Millions of customers of O2, SoftBank, Tesco Mobile, and Sky Mobile mobile carriers experienced mobile data and network outages starting December 6 because of expired certificates in Ericsson’s Serving GPRS Support Node – Mobility Management Entity (SGSN–MME) software.

“During December 6, 2018, Ericsson has identified an issue in certain nodes in the core network resulting in network disturbances for a limited number of customers in multiple countries using two specific software versions of the SGSN–MME (Serving GPRS Support Node – Mobility Management Entity),” said Ericsson’s press release.

As per Ericsson’s analysis of the mobile networks’ outage incident, the root cause behind it was an expired software certificate which led to the shutdown of affected network equipment.

The shutdown was triggered because of the industry standard practices which… (read more)

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