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

Medium Nessus Plugin ID 84651


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


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.


Update the affected packages.

See Also

Plugin Details

Severity: Medium

ID: 84651

File Name: freebsd_pkg_075952fe267e11e59d033c970e169bc2.nasl

Version: $Revision: 1.8 $

Type: local

Published: 2015/07/13

Modified: 2016/10/19

Dependencies: 12634

Risk Information

Risk Factor: Medium


Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N


Base Score: 6.5

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:mingw32-openssl, p-cpe:/a:freebsd:freebsd:openssl, cpe:/o:freebsd:freebsd

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

Patch Publication Date: 2015/07/09

Vulnerability Publication Date: 2015/07/09

Reference Information

CVE: CVE-2015-1793