We have found the Vulnerability in ESXi 5.5 server. below are the details.
The remote service accepts connections encrypted using SSL 2.0 and/or
SSL 3.0. These versions of SSL are affected by several cryptographic
- An insecure padding scheme with CBC ciphers.
- Insecure session renegotiation and resumption schemes.
An attacker can exploit these flaws to conduct man-in-the-middle
attacks or to decrypt communications between the affected service and
Although SSL/TLS has a secure means for choosing the highest supported
version of the protocol (so that these versions will be used only if
the client or server support nothing better), many web browsers
implement this in an unsafe way that allows an attacker to downgrade
a connection (such as in POODLE). Therefore, it is recommended that
these protocols be disabled entirely.
NIST has determined that SSL 3.0 is no longer acceptable for secure
communications. As of the date of enforcement found in PCI DSS v3.1,
any version of SSL will not meet the PCI SSC's definition of 'strong
I assume that you are aware of the fact that ESXi 5.5 is out of support.
Anyway, from what you write it seems that you are running an old 5.5 build. Unless you can upgrade to a newer version, you may patch the host (see https://kb.vmware.com/s/article/2146255) to disable the old protocols.