The GPRS Roaming Exchange (GRX) network, which carries roaming traffic among hundreds of mobile operators worldwide, contains Internet-reachable hosts that run vulnerable and unnecessary services, recent security scans reveal.
British intelligence agency Government Communications Headquarters (GCHQ) reportedly used spoofed LinkedIn and Slashdot pages to compromise the computers of network engineers working for global roaming exchange providers based in Europe.
Belgian telecommunications group Belgacom found unauthorized changes made to a router at its BICS subsidiary, which provides wholesale communication services to hundreds of operators worldwide.
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