FreeBSD : OpenSSH -- MaxAuthTries limit bypass via duplicates in KbdInteractiveDevices (5b74a5bc-348f-11e5-ba05-c80aa9043978)

High Nessus Plugin ID 85033


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


It was discovered that the OpenSSH sshd daemon did not check the list of keyboard-interactive authentication methods for duplicates. A remote attacker could use this flaw to bypass the MaxAuthTries limit, making it easier to perform password guessing attacks.


Update the affected package.

See Also

Plugin Details

Severity: High

ID: 85033

File Name: freebsd_pkg_5b74a5bc348f11e5ba05c80aa9043978.nasl

Version: $Revision: 2.3 $

Type: local

Published: 2015/07/28

Modified: 2016/08/10

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 8.5

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

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:openssh-portable, cpe:/o:freebsd:freebsd

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

Patch Publication Date: 2015/07/27

Vulnerability Publication Date: 2015/07/21

Reference Information

CVE: CVE-2015-5600

FreeBSD: SA-15:16.openssh