Yahoo data breach: 453K accounts exposed
Severity: high · Patch status: no-fix-needed · Since 2013-12-04
In July 2012, Yahoo! had their online publishing service "Voices" compromised via a SQL injection attack. The breach resulted in the disclosure of nearly half a million usernames and passwords stored in plain text. The breach showed that of the compromised accounts, a staggering 59% of people who also had accounts in the Sony breach reused their passwords across both services. Exposed data: email addresses, passwords. The breach dates from Jul 11, 2012; Have I Been Pwned loaded it on Dec 4, 2013.
What to do
- If you had a Yahoo account, change its password and the password of any other account that reused it.
- Turn on multi-factor authentication wherever it is offered.
- Check whether your addresses are in this breach at https://haveibeenpwned.com.
- Expect targeted phishing that quotes the leaked details; verify any unexpected contact out of band.
Sources
All live incidents on Threat Watch
