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AUSCERT External Security Bulletin Redistribution
SSL-TLS Implementations Cipher Block Chaining Padding
Information Disclosure Vulnerability
5 March 2015
AusCERT Security Bulletin Summary
Product: Cisco Adaptive Security Appliance (ASA)
Cisco ACE Application Control Engine Module
Cisco ASR 5000 Series Software
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
CVE Names: CVE-2014-8730
Revision History: March 5 2015: Added Cisco IOS and ASR 5000 Series Software
to affected products
December 17 2014: Initial Release
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Cisco Security Notice
SSL-TLS Implementations Cipher Block Chaining Padding Information Disclosure
CVE ID: CVE-2014-8730
Release Date: 2014 December 15 21:14 UTC (GMT)
Last Updated: 2015 March 3 21:22 UTC (GMT)
A vulnerability in certain implementations of the TLSv1 protocol could allow
an unauthenticated, remote attacker to access sensitive information.
The vulnerability is due to improper block cipher padding implemented in TLSv1
when using Cipher Block Chaining (CBC) mode. An attacker could exploit the
vulnerability to perform an "oracle padding" side channel attack on the
cryptographic message. A successful exploit could allow the attacker to access
Consult the bug release note for additional information about affected
products and configurations.
Product More Information CVSS
Cisco Adaptive Security Appliance (ASA) Software CSCus08101 4.3/4.1
Cisco ACE Application Control Engine Module CSCus09311 4.3/4.1
IOS CSCus17354, CSCus94884 4.3/4.1
Cisco ASR 5000 Series Software CSCus17986 4.3/4.1
Products Confirmed Not Vulnerable
Some vulnerability scanners may identify the following Cisco products as
affected by this vulnerability; however, Cisco has confirmed that these
products are not affected. This may not be a comprehensive list of all
products that are not affected. Cisco products are investigated over time and
will be added to this document as investigation of the vulnerability
Cisco ACE 4700 Series Application Control Engine Appliances
What Is a Cisco Security Notice?
The Cisco Product Security Incident Response Team (PSIRT) publishes Cisco
Security Notices to inform customers of low- to mid-level severity security
issues involving Cisco products.
Customers who wish to upgrade to a software version that includes fixes for
these issues should contact their normal support channels. Free software
updates will not be provided for issues that are disclosed through a Cisco
For additional information about Cisco PSIRT publications, see the Cisco
Security Vulnerability Policy at
Customers Using Third-Party Support Organizations
Customers may have Cisco products that are provided or maintained through
prior or existing agreements with third-party support organizations, such as
Cisco Partners, authorized resellers, or service providers. For these
products, customers should consult their service providers or support
organizations to ensure that any applied workaround or fix is the most
appropriate in the intended network before it is deployed.
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CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A stand-alone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy, and may lack important information
or contain factual errors.
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