Cisco Security Advisory: Multiple Vulnerabilities in OpenSSL Affecting Cisco Products: September 2016

[Cisco Systems Product Security Incident Response Team <psirt@xxxxxxxxx>]

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Multiple Vulnerabilities in OpenSSL Affecting Cisco Products: September 2016 

Advisory ID: cisco-sa-20160927-openssl

Revision: 1.0

For Public Release 2016 September 27 22:40 UTC (GMT)

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Summary
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On September 22, 2016, the OpenSSL Software Foundation released an advisory 
that describes 14 vulnerabilities. Of these 14 vulnerabilities, the OpenSSL 
Software Foundation classifies one as â??Critical Severity,â?? one as 
â??Moderate Severity,â?? and the other 12 as â??Low Severity.â??

Subsequently, on September 26, the OpenSSL Software Foundation released an 
additional advisory that describes two new vulnerabilities. These 
vulnerabilities affect the OpenSSL versions that were released to address the 
vulnerabilities disclosed in the previous advisory. One of the new 
vulnerabilities was rated as â??High Severityâ?? and the other as â??Moderate 
Severity.â??

Of the 16 released vulnerabilities:
    Fourteen track issues that could result in a denial of service (DoS) 
condition
    One (CVE-2016-2183, aka SWEET32) tracks an implementation of a Birthday 
attack against Transport Layer Security (TLS) block ciphers that use a 64-bit 
block size that could result in loss of confidentiality
    One (CVE-2016-2178) is a timing side-channel attack that, in specific 
circumstances, could allow an attacker to derive the private DSA key that 
belongs to another user or service running on the same system

Five of the 16 vulnerabilities affect exclusively the recently released OpenSSL 
versions that belong to the 1.1.0 code train, which has not yet been integrated 
into any Cisco product.

This advisory is available at the following link:
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160927-openssl


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