FreeBSD : GnuTLS -- NULL pointer dereference (2272e6f1-f029-11ea-838a-0011d823eebd)

high Nessus Plugin ID 140311

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Synopsis

The remote FreeBSD host is missing a security-related update.

Description

The GnuTLS project reports :

It was found by oss-fuzz that the server sending a 'no_renegotiation' alert in an unexpected timing, followed by an invalid second handshake can cause a TLS 1.3 client to crash via a NULL pointer dereference.
The crash happens in the application's error handling path, where the gnutls_deinit function is called after detecting a handshake failure.

Solution

Update the affected package.

See Also

https://gnutls.org/security-new.html#GNUTLS-SA-2020-09-04

http://www.nessus.org/u?d561a7cb

Plugin Details

Severity: High

ID: 140311

File Name: freebsd_pkg_2272e6f1f02911ea838a0011d823eebd.nasl

Version: 1.3

Type: local

Published: 9/8/2020

Updated: 9/21/2020

Risk Information

VPR

Risk Factor: Low

Score: 3.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P

Temporal Vector: E:U/RL:OF/RC:C

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:gnutls, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Exploit Ease: No known exploits are available

Patch Publication Date: 9/6/2020

Vulnerability Publication Date: 9/4/2020

Reference Information

CVE: CVE-2020-24659