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SoftBank Suspends Emergency Disaster Alerts Over PHP Security Flaw

Security2 min read

SoftBank in Japan paused its emergency disaster alert text service while it fixes a security weakness in PHP, a popular programming language. Customers of SoftBank, Y!mobile, and LINEMO cannot get earthquake and tsunami text alerts during the check.

What happened

SoftBank stopped its emergency disaster text alerts to deal with a security flaw in PHP. Because of this, people using SoftBank, Y!mobile, and LINEMO phones cannot receive earthquake and tsunami warnings by text. SoftBank started an urgent check on the morning of the 23rd. The check is planned to finish on the 26th. The company also paused the front pages of the Y!mobile and LINEMO websites on the 22nd.

Key numbers and dates

  • The check started at 6:47 a.m. and is planned to finish on the 26th.
  • The Japanese government warned about a serious PHP security flaw on the 21st.
  • The Y!mobile and LINEMO website front pages were paused on the 22nd.
  • Emergency disaster texts will restart after the check is done on the 26th. SoftBank says it will announce this separately.

Background

PHP is a tool that builders use to make websites and run servers. If hackers take advantage of a security flaw, they may get into a system they should not access. Emergency disaster texts are sent by the Japan Meteorological Agency, the government, and local governments. They warn people in a specific area about earthquakes and tsunamis, and tell them where to evacuate.

Why it matters

This shows how one software flaw can shut down a safety service that people depend on. During the pause, customers may miss warnings about earthquakes and tsunamis. Japan is a country where these alerts can save lives, so the trade-off between security and safety is important.

What to watch

  • Whether SoftBank finishes the check on the 26th and restarts the disaster text service.
  • Whether the front pages of Y!mobile and LINEMO come back in order as each system is confirmed safe.
  • Whether any business customer systems are found to be affected and limited for a time.
  • Whether customers switch to backup apps such as the Yahoo! Disaster Alert app during the pause.

Glossary

PHP
A programming language used to build websites and run servers.
SoftBank
A major Japanese phone and internet company that runs mobile service.
Y!mobile
A mobile phone brand owned by SoftBank.
LINEMO
A mobile phone service from SoftBank that is linked to the LINE app.

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