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Vulnerability of FreeBSD: information disclosure via TCP IPv6 SYN Cache

Synthesis of the vulnerability 

A local attacker can read a memory fragment via TCP IPv6 SYN Cache of FreeBSD, in order to obtain sensitive information.
Vulnerable software: FreeBSD, Data ONTAP 7-Mode.
Severity of this announce: 1/4.
Creation date: 19/03/2020.
Références of this computer vulnerability: CVE-2020-7451, FreeBSD-SA-20:04.tcp, NTAP-20200413-0001, VIGILANCE-VUL-31837.

Description of the vulnerability 

A local attacker can read a memory fragment via TCP IPv6 SYN Cache of FreeBSD, in order to obtain sensitive information.
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This computer threat note impacts software or systems such as FreeBSD, Data ONTAP 7-Mode.

Our Vigil@nce team determined that the severity of this weakness alert is low.

The trust level is of type confirmed by the editor, with an origin of internet client.

An attacker with a expert ability can exploit this computer weakness note.

Solutions for this threat 

FreeBSD: patch for TCP IPv6 SYN Cache.
A patch is available:
  https://security.FreeBSD.org/patches/SA-20:04/tcp.patch

Data ONTAP 7-Mode: solution for FreeBSD.
The solution is indicated in information sources.
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