AIX OpenSSL Advisory : openssl_advisory.asc

critical Nessus Plugin ID 73559
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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 :

- In TLS connections, certain incorrectly formatted records can cause an OpenSSL client or server to crash due to a read attempt at NULL. OpenSSL before 0.9.8m does not check for a NULL return value from bn_wexpand function calls in (1) crypto/bn/bn_div.c, (2) crypto/bn/bn_gf2m.c, (3) crypto/ec/ec2_smpl.c, and (4) engines e_ubsec.c, which has an unspecified impact and context-dependent attack vectors. (CVE-2009-3245)

- The kssl_keytab_is_available function in ssl/kssl.c in OpenSSL before 0.9.8n, when Kerberos is enabled but Kerberos configuration files cannot be opened, does not check a certain return value, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via SSL cipher negotiation, as demonstrated by a chroot installation of Dovecot or stunnel without Kerberos configuration files inside the chroot. (CVE-2010-0433)

- The ssl3_get_record function in ssl/s3_pkt.c in OpenSSL 0.9.8f through 0.9.8m allows remote attackers to cause a denial of service (crash) via a malformed record in a TLS connection that triggers a NULL pointer dereference, related to the minor version number. (CVE-2010-0740)

Solution

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

To extract the fixes from the tar file :

zcat openssl.0.9.8.1103.tar.Z | tar xvf - or zcat openssl-fips.12.9.8.1103.tar.Z | tar xvf - or zcat openssl.0.9.8.806.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_advisory.asc

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

Plugin Details

Severity: Critical

ID: 73559

File Name: aix_openssl_advisory.nasl

Version: 1.9

Type: local

Published: 4/16/2014

Updated: 1/4/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.8

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

Temporal Vector: E:POC/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: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/21/2010

Vulnerability Publication Date: 2/23/2010

Reference Information

CVE: CVE-2009-3245, CVE-2010-0433, CVE-2010-0740

BID: 38533, 38562, 39013

CWE: 20