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VULNERABILITY: Multiple OpenSSL vulnerabilities |
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Hash: SHA1
IBM SECURITY ADVISORY
First Issued: Wed Mar 21 13:02:49 CDT 2012
|Updated: Thu Mar 22 09:06:21 CDT 2012
|Added VIOS release reference
The most recent version of this document is available here:
http://aix.software.ibm.com/aix/efixes/security/openssl_advisory3.asc
or
ftp://aix.software.ibm.com/aix/efixes/security/openssl_advisory3.asc
VULNERABILITY SUMMARY
VULNERABILITY: Multiple OpenSSL vulnerabilities
PLATFORMS: AIX 5.3, 6.1, 7.1, and earlier releases
| VIOS 2.X and 1.5.2
SOLUTION: Apply the fix as described below.
THREAT: See below
CVE Numbers: CVE-2011-4108
CVE-2011-4109
CVE-2011-4576
CVE-2011-4619
CVE-2012-0050
DETAILED INFORMATION
I. DESCRIPTION (from cve.mitre.org)
The DTLS implementation in OpenSSL before 0.9.8s and 1.x before
1.0.0f performs a MAC check only if certain padding is valid, which
makes it easier for remote attackers to recover plaintext via a
padding oracle attack.
Double free vulnerability in OpenSSL 0.9.8 before 0.9.8s, when
X509_V_FLAG_POLICY_CHECK is enabled, allows remote attackers to have
an unspecified impact by triggering failure of a policy check.
The SSL 3.0 implementation in OpenSSL before 0.9.8s and 1.x before
1.0.0f does not properly initialize data structures for block cipher
padding, which might allow remote attackers to obtain sensitive
information by decrypting the padding data sent by an SSL peer.
The Server Gated Cryptography (SGC) implementation in OpenSSL before
0.9.8s and 1.x before 1.0.0f does not properly handle handshake
restarts, which allows remote attackers to cause a denial of service
via unspecified vectors.
OpenSSL 0.9.8s and 1.0.0f does not properly support DTLS applications,
which allows remote attackers to cause a denial of service via
unspecified vectors. NOTE: this vulnerability exists because of an
incorrect fix for CVE-2011-4108.
Please see the following for more information:
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4108
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4109
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4576
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4619
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2012-0050
II. PLATFORM VULNERABILITY ASSESSMENT
To determine if your system is vulnerable, execute the following
command:
lslpp -L openssl.base
On VIO Server:
oem_setup_env
lslpp -L openssl.base
The following fileset levels are vulnerable:
AIX 7.1, 6.1, 5.3: all versions less than or equal 0.9.8.1800
AIX 7.1, 6.1, 5.3: FIPS capable versions less than or equal 12.9.8.1180
AIX 5.2: all versions less than or equal 0.9.8.808
| VIOS 2.X, 1.5.2: all versions less than or equal 0.9.8.1800
IMPORTANT: If AIX OpenSSH is in use, it must be updated to version
OpenSSH 5.0 or later, depending on the OpenSSL version according to
following compatibility matrix:
AIX OpenSSL OpenSSH
------------------------------------------------------------------
5.2 OpenSSL 0.9.8.80x OpenSSH 5.0
5.3,6.1,7.1 OpenSSL 0.9.8.18xx OpenSSH 5.8.0.61xx
5.3,6.1,7.1 OpenSSL-fips 12.9.8.18xx OpenSSH 5.8.0.61xx
| VIOS OpenSSL OpenSSH
| ------------------------------------------------------------------
| 2.X,1.5.2 OpenSSL 0.9.8.18x OpenSSH 5.8.0.61xx
AIX OpenSSH can be downloaded from:
OpenSSH 5.0:
http://sourceforge.net/projects/openssh-aix
OpenSSH 5.8.0.61xx
https://www14.software.ibm.com/webapp/iwm/web/preLogin.do?source=aixbp
III. FIXES
A fix is available, and it can be downloaded from:
https://www14.software.ibm.com/webapp/iwm/web/preLogin.do?source=aixbp
To extract the fixes from the tar file:
zcat openssl.0.9.8.1801.tar.Z | tar xvf -
or
zcat openssl-fips.12.9.8.1801.tar.Z | tar xvf -
or
zcat openssl.0.9.8.809.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
IV. WORKAROUNDS
There are no workarounds.
V. CONTACT INFORMATION
If you would like to receive AIX Security Advisories via email,
please visit:
http://www.ibm.com/systems/support
and click on the "My notifications" link.
To view previously issued advisories, please visit:
http://www14.software.ibm.com/webapp/set2/subscriptions/pqvcmjd
Comments regarding the content of this announcement can be
directed to:
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To obtain the PGP public key that can be used to communicate
securely with the AIX Security Team you can either:
A. Send an email with "get key" in the subject line to:
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B. Download the key from our web page:
http://www.ibm.com/systems/resources/systems_p_os_aix_security_pgpkey.txt
C. Download the key from a PGP Public Key Server. The key ID is:
0x28BFAA12
Please contact your local IBM AIX support center for any
assistance.
eServer is a trademark of International Business Machines
Corporation. IBM, AIX and pSeries are registered trademarks of
International Business Machines Corporation. All other trademarks
are property of their respective holders.
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