The version of OpenSSL installed on the remote host is prior to 1.1.0k. It is, therefore, affected by a vulnerability as referenced in the 1.1.0k advisory.

  - ChaCha20-Poly1305 is an AEAD cipher, and requires a unique nonce input for every encryption operation. RFC     7539 specifies that the nonce value (IV) should be 96 bits (12 bytes). OpenSSL allows a variable nonce     length and front pads the nonce with 0 bytes if it is less than 12 bytes. However it also incorrectly     allows a nonce to be set of up to 16 bytes. In this case only the last 12 bytes are significant and any     additional leading bytes are ignored. It is a requirement of using this cipher that nonce values are     unique. Messages encrypted using a reused nonce value are susceptible to serious confidentiality and     integrity attacks. If an application changes the default nonce length to be longer than 12 bytes and then     makes a change to the leading bytes of the nonce expecting the new value to be a new unique nonce then     such an application could inadvertently encrypt messages with a reused nonce. Additionally the ignored     bytes in a long nonce are not covered by the integrity guarantee of this cipher. Any application that     relies on the integrity of these ignored leading bytes of a long nonce may be further affected. Any     OpenSSL internal use of this cipher, including in SSL/TLS, is safe because no such use sets such a long     nonce value. However user applications that use this cipher directly and set a non-default nonce length to     be longer than 12 bytes may be vulnerable. OpenSSL versions 1.1.1 and 1.1.0 are affected by this issue.
    Due to the limited scope of affected deployments this has been assessed as low severity and therefore we     are not creating new releases at this time. Fixed in OpenSSL 1.1.1c (Affected 1.1.1-1.1.1b). Fixed in     OpenSSL 1.1.0k (Affected 1.1.0-1.1.0j). (CVE-2019-1543)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Detections

Analytics

OpenSSL 1.1.0 < 1.1.0k Vulnerability

high Nessus Plugin ID 125642

Version 1.8