AIX NAS Advisory : nas_advisory3.asc

High Nessus Plugin ID 83874

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

http://aix.software.ibm.com/aix/efixes/security/nas_advisory3.asc

Plugin Details

Severity: High

ID: 83874

File Name: aix_nas_advisory3.nasl

Version: $Revision: 1.6 $

Type: local

Published: 2015/05/28

Modified: 2016/08/02

Dependencies: 12634

Risk Information

Risk Factor: High

CVSSv2

Base Score: 8.7

Temporal Score: 7.6

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

Temporal Vector: CVSS2#E:ND/RL:OF/RC:C

Vulnerability Information

CPE: cpe:/o:ibm:aix, cpe:/a:mit:kerberos

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

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2015/05/21

Vulnerability Publication Date: 2015/02/03

Reference Information

CVE: CVE-2014-5352, CVE-2014-5355, CVE-2014-9421, CVE-2014-9422, CVE-2014-9423

BID: 72494, 72495, 72496, 72503, 74042

OSVDB: 117920, 117921, 117922, 117923, 118567, 118568, 118569, 118570