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Researchers discovered a vulnerability (CVE-2014-0160) in OpenSSL, an open source library for secure data transport used by most websites, including the enterprise cloud apps that we use for work. This vulnerability, which enables TLS “heartbeat” data packets to be passed without authentication with the server, allows hackers to steal information located in the memory of each server, which can include passwords and private encryption keys.
We at Netskope maintain a database of enterprise cloud apps, including ones that use SSL in order to help organizations manage their cloud app security risk. We have begun a countdown process of apps that are susceptible to this vulnerability and have not yet patched their servers. We started with the more than 4,500 enterprise cloud apps in our database, identified which ones are vulnerable, looked at the IP addresses of their SSL servers, and scanned those servers to determine whether they have been patched. We looked across the publicly-facing domains of each of the enterprise cloud apps and arrived at our count.
In an effort to release this information as quickly as possible, we have assumed that patches applied to publicly facing domains for an app have also been applied to non-publicly facing domains or subdomains. This is a good faith assumption we have made and we will update the community via this blog should we find information to the contrary. Note that this process did not result in Netskope collecting any of the data exposed by this vulnerability.
Here’s what app vendors can do to remediate their systems, if they haven’t already:
- Upgrade to OpenSSL version 1.0.1g or patch their system using a version of OpenSSL configured with -DOPENSSL_NO_HEARTBEATS.
- Revoke and reissue all certificates. Ensure new certificates use new keys.
- Alert users of the vulnerability and remediation steps.
- Have users change their passwords after the ab