AIX OpenSSL Advisory : openssl_advisory6.asc

Medium Nessus Plugin ID 73564

Synopsis

The remote AIX host is running a vulnerable version of OpenSSL.

Description

The version of OpenSSL running on the remote host is affected by the following vulnerabilities :

- A carefully crafted invalid TLS handshake could crash OpenSSL with a NULL pointer exception. A malicious server could use this flaw to crash a connecting client.
This issue only affected OpenSSL 1.0.1 versions.
(CVE-2013-4353)

- A flaw in DTLS handling can cause an application using OpenSSL and DTLS to crash. This is not a vulnerability for OpenSSL prior to 1.0.0. OpenSSL is vulnerable to a denial of service, caused by the failure to properly maintain data structures for digest and encryption contexts by the DTLS retransmission implementation. A remote attacker could exploit this vulnerability to cause the daemon to crash. (CVE-2013-6450)

- A flaw in OpenSSL can cause an application using OpenSSL to crash when using TLS version 1.2. This issue only affected OpenSSL 1.0.1 versions. OpenSSL is vulnerable to a denial of service, caused by an error in the ssl_get_algorithm2 function. A remote attacker could exploit this vulnerability using specially crafted traffic from a TLS 1.2 client to cause the daemon to crash. (CVE-2013-6449)

Solution

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

To extract the fixes from the tar file :

zcat openssl-1.0.1.501.tar.Z | tar xvf -

IMPORTANT : If possible, it is recommended that a mksysb backup of the system be created. Verify it is both bootable and readable before proceeding.

To preview the fix installation :

installp -apYd . openssl

To install the fix package :

installp -aXYd . openssl

See Also

http://aix.software.ibm.com/aix/efixes/security/openssl_advisory6.asc

https://www14.software.ibm.com/webapp/iwm/web/preLogin.do?source=aixbp

Plugin Details

Severity: Medium

ID: 73564

File Name: aix_openssl_advisory6.nasl

Version: $Revision: 1.5 $

Type: local

Published: 2014/04/16

Modified: 2016/05/04

Dependencies: 12634

Risk Information

Risk Factor: Medium

CVSSv2

Base Score: 5.8

Temporal Score: 4.3

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

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

Vulnerability Information

CPE: cpe:/o:ibm:aix

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: 2014/02/25

Vulnerability Publication Date: 2013/12/14

Reference Information

CVE: CVE-2013-4353, CVE-2013-6449, CVE-2013-6450

BID: 64530, 64618, 64691

OSVDB: 101347, 101597, 101843