Starting from the
Coin Desk article there is this test site :
http://filippo.io/Heartbleed/Here are my test results :
(list from bitcoinwisdom)
All good, btc-e.com:443 seems not affected!
All good, cavirtex.com:443 seems not affected!
All good, bitcoin.de:443 seems not affected!
All good, coinbase.com:443 seems not affected!
All good, kraken.com:443 seems not affected!
All good, bitfinex.com:443 seems not affected!
All good, bter.com:443 seems not affected!
bitstamp.net:443 IS VULNERABLE
btcchina.com:443 IS VULNERABLE
okcoin.com:443 IS VULNERABLE
cryptsy.com:443 IS VULNERABLE
The test site did error with a couple of sites, namely huobi.com and campbx.com
A bit more detail lifted from the article for the lazy :
Exploiting Heartbleed, an attacker could access the RAM of affected systems, allowing them to see up to 64 kilobytes of data at a time – enough to build up enough knowledge to access a system’s secret keys. Those keys are used to encrypt and decrypt sensitive traffic and identify service providers.
IF YOU WANT TO CONTRIBUTE PLEASE WRITE CAPS-ALL ONLY AS THIS IS A VERY SERIOUS ISSUE!