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AIX NAS Advisory : nas_advisory3.asc
high Nessus Plugin ID 83874
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Synopsis
The remote AIX host has a version of NAS installed that is affected by multiple vulnerabilities.Description
The version of the Network Authentication Service (NAS) installed on the remote AIX host is affected by the following vulnerabilities related to Kerberos 5 :- Denial of service and remote code execution vulnerabilities exist due to security context handles not being properly maintained, allowing an authenticated, remote attacker to crash the service or execute arbitrary code using crafted GSSAPI traffic.
(CVE-2014-5352)
- A denial of service vulnerability exists due to improper handling of zero-byte or unterminated strings.
(CVE-2014-5355)
- Denial of service and remote code execution vulnerabilities exist which allow an authenticated, remote attacker to crash the service or execute arbitrary code using crafted, malformed XDR data.
(CVE-2014-9421)
- A privilege escalation vulnerability exists that allows an authenticated, remote attacker to gain administrative access via a flaw in kadmin authorization checks.
(CVE-2014-9422)
- An information disclosure vulnerability allows an attacker to gain information about process heap memory from NAS packets. (CVE-2014-9423)
Solution
Fixes are available at the 1.5.0.7 and 1.6.0.2 levels of the software and can be downloaded from the AIX website.For the NAS fileset level 1.5.0.7, apply ifix 1507c_fix.150404.epkg.Z if only krb5.client.rte is installed, otherwise apply 1507s_fix.150407.epkg.Z if krb5.server.rte is installed.
For the NAS fileset level 1.6.0.2, apply ifix 1602c_fix.150404.epkg.Z if only krb5.client.rte is installed, otherwise apply 1602s_fix.150407.epkg.Z if krb5.server.rte is installed.
For the NAS fileset level 1.5.0.3-1.5.0.4, upgrade to NAS fileset level 1.6.0.2 and apply ifix 1602c_fix.150404.epkg.Z if only krb5.client.rte is installed, otherwise apply 1602s_fix.150407.epkg.Z if krb5.server.rte is installed.
For all other NAS fileset levels, upgrade to NAS fileset level 1.5.0.7 and apply ifix 1507c_fix.150404.epkg.Z if only krb5.client.rte is installed, otherwise apply 1507s_fix.150407.epkg.Z if krb5.server.rte is installed.
See Also
https://aix.software.ibm.com/aix/efixes/security/nas_advisory3.asc
Plugin Details
Severity: High
ID: 83874
File Name: aix_nas_advisory3.nasl
Version: 1.11
Type: local
Family: AIX Local Security Checks
Published: 5/28/2015
Updated: 4/21/2023
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 5.9
CVSS v2
Risk Factor: High
Base Score: 8.7
Temporal Score: 7.6
Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:C/A:C
Vulnerability Information
CPE: cpe:/o:ibm:aix, cpe:/a:mit:kerberos
Required KB Items: Host/local_checks_enabled, Host/AIX/version, Host/AIX/lslpp
Exploit Ease: No known exploits are available
Patch Publication Date: 5/21/2015
Vulnerability Publication Date: 2/3/2015
Reference Information
CVE: CVE-2014-5352, CVE-2014-5355, CVE-2014-9421, CVE-2014-9422, CVE-2014-9423