FreeBSD : openssl -- alternate chains certificate forgery vulnerability (075952fe-267e-11e5-9d03-3c970e169bc2)

This script is Copyright (C) 2015-2016 Tenable Network Security, Inc.


Synopsis :

The remote FreeBSD host is missing one or more security-related
updates.

Description :

OpenSSL reports :

During certificate verification, OpenSSL (starting from version 1.0.1n
and 1.0.2b) will attempt to find an alternative certificate chain if
the first attempt to build such a chain fails. An error in the
implementation of this logic can mean that an attacker could cause
certain checks on untrusted certificates to be bypassed, such as the
CA flag, enabling them to use a valid leaf certificate to act as a CA
and 'issue' an invalid certificate.

See also :

https://www.openssl.org/news/secadv/20150709.txt
http://www.nessus.org/u?1ccc60f8

Solution :

Update the affected packages.

Risk factor :

Medium / CVSS Base Score : 6.4
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N)

Family: FreeBSD Local Security Checks

Nessus Plugin ID: 84651 ()

Bugtraq ID:

CVE ID: CVE-2015-1793

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