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ESB-2016.0601 - [IBM i] OpenSSL: Multiple vulnerabilities

Date: 07 March 2016
References: ESB-2016.0543.2  ESB-2016.0544  ESB-2016.0547  ESB-2016.0560  ESB-2016.0569  ASB-2016.0019  ESB-2016.0587  ESB-2016.0634  ESB-2016.0636  ESB-2016.0661  
ESB-2016.0690  ESB-2016.0783  ESB-2016.1029  

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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2016.0601
    Security Bulletin: Multiple vulnerabilities in OpenSSL affect IBM i
                               7 March 2016

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           OpenSSL
Publisher:         IBM
Operating System:  IBM i
Impact/Access:     Access Privileged Data -- Remote/Unauthenticated
                   Denial of Service      -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2016-0800 CVE-2016-0799 CVE-2016-0798
                   CVE-2016-0797 CVE-2016-0705 CVE-2016-0704
                   CVE-2016-0703 CVE-2016-0702 

Reference:         ASB-2016.0019
                   ESB-2016.0587
                   ESB-2016.0569
                   ESB-2016.0560
                   ESB-2016.0547
                   ESB-2016.0544
                   ESB-2016.0543

Original Bulletin: 
   https://www-01.ibm.com/support/docview.wss?uid=nas8N1021156

- --------------------------BEGIN INCLUDED TEXT--------------------

Security Bulletin: Multiple vulnerabilities in OpenSSL affect IBM i

Document information

More support for:

IBM i

Security

Software version:

7.1, 7.2

Operating system(s):

IBM i

Reference #:

N1021156

Modified date:

2016-03-03

Security Bulletin

Summary

OpenSSL vulnerabilities were disclosed on March 1, 2016 by the OpenSSL 
Project. OpenSSL is used by IBM i. IBM i has addressed the applicable CVEs 
including the DROWN: Decrypting RSA with Obsolete and Weakened eNcryption" 
vulnerability.

Vulnerability Details

CVEID: CVE-2016-0800

DESCRIPTION: OpenSSL could allow a remote attacker to bypass security 
restrictions. By using a server that supports SSLv2 and EXPORT cipher suites 
as a Bleichenbacher RSA padding oracle, an attacker could exploit this 
vulnerability to decrypt TLS sessions between clients and non-vulnerable 
servers. This vulnerability is also known as the DROWN attack.

CVSS Base Score: 7.4

CVSS Temporal Score: See 
https://exchange.xforce.ibmcloud.com/vulnerabilities/111139 for the current 
score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N)

CVEID: CVE-2016-0705

DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by a 
double-free error when parsing DSA private keys. An attacker could exploit 
this vulnerability to corrupt memory and cause a denial of service.

CVSS Base Score: 3.7

CVSS Temporal Score: See 
https://exchange.xforce.ibmcloud.com/vulnerabilities/111140 for the current 
score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-0798

DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by a memory
leak in SRP servers. An attacker could exploit this vulnerability using a 
specially crafted username value to cause a denial of service.

CVSS Base Score: 3.7

CVSS Temporal Score: See 
https://exchange.xforce.ibmcloud.com/vulnerabilities/111141 for the current 
score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-0797

DESCRIPTION: OpenSSL is vulnerable to a denial of service, caused by a NULL 
pointer dereference in the BN_hex2bn/BN_dec2bn() function. An attacker could 
exploit this vulnerability using specially crafted data to cause a denial of 
service.

CVSS Base Score: 3.7

CVSS Temporal Score: See 
https://exchange.xforce.ibmcloud.com/vulnerabilities/111142 for the current 
score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L)

CVEID: CVE-2016-0799

DESCRIPTION: OpenSSL could allow a remote attacker to obtain sensitive 
information, caused by a memory error in the BIO_*printf() functions. An 
attacker could exploit this vulnerability using specially crafted data to 
trigger an out-of-bounds read.

CVSS Base Score: 3.7

CVSS Temporal Score: See 
https://exchange.xforce.ibmcloud.com/vulnerabilities/111143 for the current 
score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID: CVE-2016-0704

DESCRIPTION: OpenSSL could allow a remote attacker to bypass security 
restrictions. The s2_srvr.c code overwrites the wrong bytes in the master-key
when applying Bleichenbacher protection for export cipher suites. An attacker
could exploit this vulnerability using a Bleichenbacher oracle to decrypt 
sessions.

CVSS Base Score: 5.9

CVSS Temporal Score: See 
https://exchange.xforce.ibmcloud.com/vulnerabilities/111146 for the current 
score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N)

CVEID: CVE-2016-0702

DESCRIPTION: OpenSSL could allow a local attacker to obtain sensitive 
information, caused by a side-channel attack against a system based on the 
Intel Sandy-Bridge microarchitecture. An attacker could exploit this 
vulnerability to recover RSA keys.

CVSS Base Score: 2.9

CVSS Temporal Score: See 
https://exchange.xforce.ibmcloud.com/vulnerabilities/111144 for the current 
score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N)

CVEID: CVE-2016-0703

DESCRIPTION: OpenSSL could allow a remote attacker to bypass security 
restrictions, caused by the failure to enforce that a clear-key-length value 
is 0 for non-export ciphers by the SSLv2 's2_srvr.c code. When clear-key bytes
displace encrypted-key bytes, an attacker could exploit this vulnerability to
conduct a divide-and-conquer key recovery attack.

CVSS Base Score: 7.4

CVSS Temporal Score: See 
https://exchange.xforce.ibmcloud.com/vulnerabilities/111145 for the current 
score

CVSS Environmental Score*: Undefined

CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N)

Affected Products and Versions

Releases 7.1 and 7.2 of IBM i are affected.

Remediation/Fixes

The issue can be fixed by applying a PTF to the IBM i Operating System.

Releases 7.1 and 7.2 of IBM i are supported and will be fixed.

http://www-933.ibm.com/support/fixcentral/

The IBM i PTF numbers are:

Release 7.1 SI59895

Release 7.2 SI59896

Important note: IBM recommends that all users running unsupported versions of
affected products upgrade to supported and fixed version of affected products.

Workarounds and Mitigations

None

Get Notified about Future Security Bulletins

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alerts like this.

References

Complete CVSS v3 Guide

On-line Calculator v3

Related information

IBM Secure Engineering Web Portal

IBM Product Security Incident Response Blog

*The CVSS Environment Score is customer environment specific and will 
ultimately impact the Overall CVSS Score. Customers can evaluate the impact of
this vulnerability in their environments by accessing the links in the 
Reference section of this Security Bulletin.

Disclaimer

According to the Forum of Incident Response and Security Teams (FIRST), the 
Common Vulnerability Scoring System (CVSS) is an "industry open standard 
designed to convey vulnerability severity and help to determine urgency and 
priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY 
OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 
FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT 
OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

- --------------------------END INCLUDED TEXT--------------------

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