FreeBSD : OpenSSH -- PAM vulnerabilities (2920c449-4850-11e5-825f-c80aa9043978)

High Nessus Plugin ID 85594


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


OpenSSH 6.8 and 6.9 incorrectly set TTYs to be world-writable. Local attackers may be able to write arbitrary messages to logged-in users, including terminal escape sequences. Reported by Nikolay Edigaryev.

Fixed a privilege separation weakness related to PAM support.
Attackers who could successfully compromise the pre-authentication process for remote code execution and who had valid credentials on the host could impersonate other users.

Fixed a use-after-free bug related to PAM support that was reachable by attackers who could compromise the pre-authentication process for remote code execution.


Update the affected package.

See Also

Plugin Details

Severity: High

ID: 85594

File Name: freebsd_pkg_2920c449485011e5825fc80aa9043978.nasl

Version: $Revision: 2.4 $

Type: local

Published: 2015/08/24

Modified: 2016/08/10

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 7.2

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/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: 2015/08/21

Vulnerability Publication Date: 2015/08/11

Reference Information

CVE: CVE-2015-6563, CVE-2015-6564, CVE-2015-6565

FreeBSD: SA-15:22.openssh