Detections
Analytics
AIX OpenSSH Advisory : openssh_advisory9.asc
high Nessus Plugin ID 95477
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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 :- An elevation of privilege vulnerability exists in the do_setup_env() function within file session.c when handling user-supplied environmental variables. A local attacker can exploit this to gain elevated privileges by triggering a crafted environment for the /bin/login program. This vulnerability requires that the UseLogin feature is enabled and that PAM is configured to read .pam_environment files in user home directories.
(CVE-2015-8325)
- A flaw exists when handling authentication requests that involve overly long passwords due to returning shorter response times for requests for invalid users than for valid users. An unauthenticated, remote attacker can exploit this to enumerate valid usernames by conducting a timing attack. (CVE-2016-6210)
- A denial of service vulnerability exists in the auth_password() function within auth-passwd.c due to a a failure to limit password lengths. An unauthenticated, remote attacker can exploit this, via overly long passwords, to cause the excessive consumption of CPU resources. (CVE-2016-6515)
Solution
A fix is available and can be downloaded from the IBM AIX website.See Also
https://aix.software.ibm.com/aix/efixes/security/openssh_advisory9.asc
Plugin Details
Severity: High
ID: 95477
File Name: aix_openssh_advisory9.nasl
Version: 1.6
Type: local
Family: AIX Local Security Checks
Published: 12/2/2016
Updated: 4/21/2023
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.9
CVSS v2
Risk Factor: High
Base Score: 7.8
Temporal Score: 6.1
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C
CVSS v3
Risk Factor: High
Base Score: 7.5
Temporal Score: 6.7
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C
Vulnerability Information
CPE: cpe:/o:ibm:aix, cpe:/a:openbsd:openssh
Required KB Items: Host/local_checks_enabled, Host/AIX/version, Host/AIX/lslpp
Exploit Available: true
Exploit Ease: Exploits are available
Patch Publication Date: 9/8/2016
Vulnerability Publication Date: 4/13/2016