AIX OpenSSH Advisory : openssh_advisory10.asc

high Nessus Plugin ID 136324
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Synopsis

The remote AIX host has a version of OpenSSH installed that is affected by multiple vulnerabilities.

Description

The remote AIX host has a version of OpenSSH installed that is affected by the following vulnerabilities :

- OpenSSH is vulnerable to a denial of service, caused by an error in the kex_input_kexinit() function. By sending specially crafted data during the key exchange process, a remote attacker could exploit this vulnerability to consume all available memory resources.
(CVE-2016-8858)

- OpenSSH could allow a remote authenticated attacker to execute arbitrary code on the system, caused by the loading of a specially crafted PKCS#11 module across a forwarded agent channel. An attacker could exploit this vulnerability to write files or execute arbitrary code on the system. (CVE-2016-10009)

- OpenSSH could allow a local authenticated attacker to obtain sensitive information, caused by a privilege separation flaw. An attacker could exploit this vulnerability to obtain host private key material and other sensitive information. (CVE-2016-10011)

- OpenSSH could allow a local attacker to gain elevated privileges on the system, caused by improper bounds checking in the shared memory manager. An attacker could exploit this vulnerability to gain elevated privileges on the system. (CVE-2016-10012)

Solution

A fix is available and can be downloaded from the IBM AIX website.

See Also

http://aix.software.ibm.com/aix/efixes/security/openssh_advisory10.asc

Plugin Details

Severity: High

ID: 136324

File Name: aix_openssh_advisory10.nasl

Version: 1.3

Type: local

Published: 5/5/2020

Updated: 1/4/2021

Dependencies: ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-2016-10012

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.2

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

CVSS v3

Risk Factor: High

Base Score: 7.8

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

Vulnerability Information

CPE: cpe:/o:ibm:aix, cpe:/a:openbsd:openssh

Required KB Items: Host/AIX/lslpp, Host/local_checks_enabled, Host/AIX/version

Patch Publication Date: 2/5/2017

Vulnerability Publication Date: 2/5/2017

Reference Information

CVE: CVE-2016-8858, CVE-2016-10009, CVE-2016-10011, CVE-2016-10012

BID: 93776, 94968, 94977, 94975