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AEC v1.0.4

Cyber Security Info
@Cybersecurityinfo

Critical vulnerabilities in the GRX networks

June 5, 2014

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Security researchers from Dutch telecom provider KPN have analyzed the GRX (GPRS Roaming Exchange) systems of 23 GRX providers worldwide. GRX allows roaming calls even if the two connected providers do not have direct link between them. The systems of GRX providers are often accessible from the internet, run unnecessary services and contain serious known vulnerabilities. Access to the GRX from the internet allows any attacker access to the GTP (GPRS Tunneling Protocol) and exfiltration of sensitive data identifying the mobile device, transmitted images, the user and his/her location.

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