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AIX OpenSSL Heartbleed 修复

2014年04月17日 AIX运维 评论 64 条 阅读 915 次

AIX OpenSSL Heartbleed Vulnerability CVE-2014-0160

 

http://aix.software.ibm.com/aix/efixes/security/openssl_advisory7.doc
https://aix.software.ibm.com/aix/efixes/security/openssl_advisory7.doc
ftp://aix.software.ibm.com/aix/efixes/security/openssl_advisory7.doc

Title: Security Bulletin: AIX is affected by a vulnerability in OpenSSL
(CVE-2014-0160)

Summary: A security vulnerability has been discovered in OpenSSL.

Vulnerability Details
CVE-ID: CVE-2014-0160 
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-0160

DESCRIPTION: OpenSSL could allow a remote attacker to obtain sensitive
information, caused by an error in the TLS/DTLS heartbeat functionality. An
attacker could exploit this vulnerability to expose 64k of private memory and
retrieve secret keys. This vulnerability can be remotely exploited,
authentication is not required and the exploit is not complex. An exploit can
affect the confidentially, but not integrity or availability.

CVSS Base Score: 5.0
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/92322
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:N/AC:L/Au:N/C:P/I:N/A:N)

Warning:  We strongly encourage you to take action as soon as possible as
potential implications to your environment may be more serious than indicated by
the CVSS score.

Affected Products and Versions:

OpenSSL version 1.0.1.500 and above in the following AIX/VIOS releases:
AIX: 5.3, 6.1, 7.1 and VIOS 2.2.3.*

Remediation/Fixes  

Product	        
AIX 5.3, 6.1, 7.1 and VIOS 2.2.3.*   

VRMF
OpenSSL version greater or equal to 1.0.1.500

APAR
N/a

Remediation/First Fix
ftp://aix.software.ibm.com/aix/efixes/security/openssl_ifix7.tar
(ifix: 0160_ifix.140409.epkg.Z)

This ifix disables the OpenSSL heartbeat option by compiling with
-DOPENSSL_NO_HEARTBEATS.

Note: AIX OpenSSL v0.9.8.xxxx and 12.9.8.xxxx are not vulnerable to this
security vulnerability.

After applying the fix, additional instructions are needed for CVE-2014-0160

1) Replace your SSL Certificates.
You need to revoke existing SSL certificates and reissue new certificates. You
need to be sure not to generate the new certificates using the old private key
and create a new private key (ie using "openssl genrsa") and use that new
private key to create the new certificate signing request (CSR). 

2) Reset User Credentials
Users of network facing applications protected by a vulnerable version of
OpenSSL should be forced to reset their passwords and should revoke any
authentication or session related cookies set prior to the time OpenSSL was
upgraded and force the user to re-authenticate.

Warning:  Your environment may require additional fixes for other products,
including non-IBM products.  Please replace the SSL certificates and reset the
user credentials after applying the necessary fixes to your environment.

Workarounds and Mitigations
None known

Reference
•	Complete CVSS Guide (http://www.first.org/cvss/cvss-guide.html)
•	On-line Calculator V2 (http://nvd.nist.gov/cvss.cfm?calculator&adv&version=2)
•	OpenSSL Project vulnerability website
(http://www.openssl.org/news/vulnerabilities.html)
•	Heartbleed (http://heartbleed.com/)

Related Information
IBM Secure Engineering Web Portal
(https://www-304.ibm.com/jct03001c/security/secure-engineering/)
IBM Product Security Incident Response Blog
(https://www-304.ibm.com/connections/blogs/PSIRT/?lang=en_us)

Acknowledgement
None

Change History
<10 April 2014>:  Original Copy Published

*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.
Doc number: 3488 Published date: 20140410

 

原文链接:http://www14.software.ibm.com/webapp/set2/subscriptions/onvdq?mode=18&ID=3488&myns=pwraix61&mync=E

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