Bitstamp currently disabled logins. They posted this on their website:
Dear Bitstamp clients,
After reported vulnerabilities in OpenSSL, we applied necessary patches to our system. Incapsula, our DDOS mitigation provider is still working patching their system.
In order to provide required security, both system need to be patched. We are in constant contact with Incapsula and are working with them to complete necessary procedures. Until then Bitstamp has decided to temporally deactivate:
-account registration,
-account login
-and all virtual currency withdrawal functions
We will keep you updated on the progress.
Thank you for understanding.
Best regards
Bitstamp team
BitFinex sent an email to its users earlier today:
Hello Rannasha,
As you may be aware, yesterday a vulnerability affecting latest versions of OpenSSL used by Bitfinex was discovered.
While this vulnerability has now been fixed, we strongly encourage you to change your password as soon as possible and enable/re-enable OTP authentication in your Bitfinex account.
Withdrawals will be disabled for 10 hours to let you the time to change your information.
We will update you about the situation in the coming hours.
Regards,
The Bitfinex Team
https://www.bitfinex.com/