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The bug, discovered by a German firm, allows hackers to remotely gain control of and also clone certain mobile SIM cards.
Hackers could use compromised SIMs to commit financial crimes or engage in electronic espionage, according to Berlin’s Security Research Labs, which will describe the vulnerabilities at the Black Hat hacking conference that opens in Las Vegas on July 31.
The UN’s Geneva-based International Telecommunications Union, which has reviewed the research, described it as “hugely significant”.
“These findings show us where we could be heading in terms of cybersecurity risks,” ITU Secretary General Hamadoun Touré said.
He said the agency would notify telecommunications regulators and other government agencies in nearly 200 countries about the potential threat and also reach out to hundreds of mobile companies, academics and other industry experts.
A spokeswoman for the GSMA, which represents nearly 800 mobile operators worldwide, said it also reviewed the research. “We have been able to consider the implications and provide guidance to those network operators and SIM vendors that may be impacted,” said GSMA spokeswoman Claire Cranton.
Nicole Smith, a spokeswoman for Gemalto NV, the world’s biggest maker of SIM cards, said her company supported GSMA’s response.
“Our policy is to refrain from commenting on details relating to our customers’ operations,” she said.
Cracking SIM cards has long been the Holy Grail of hackers because the tiny devices are located in phones and allow operators to identify and authenticate subscribers as they use networks.
Karsten Nohl, the chief scientist who led the research team and will reveal the details at Black Hat, said the hacking only works on SIMs that use an old encryption technology known as DES. The technology is still used on at least one out of eight SIMs, or a minimum of 500 million phones, according to Nohl.
