Cisco Security Advisory
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AV:N/AC:L/Au:N/C:P/I:N/A:P/E:F/RL:OF/RC:C
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A vulnerability in the HTTP traffic server component of Cisco Expressway could allow an unauthenticated, remote attacker to initiate TCP connections to arbitrary hosts. This does not allow for full traffic proxy through the Expressway.
The vulnerability is due to insufficient access control for TCP traffic passed through the Cisco Expressway. An attacker could exploit this vulnerability by sending a crafted URL through the Cisco Expressway. An exploit could allow the attacker to enumerate hosts and services of arbitrary hosts, as well as degrade performance through the Cisco Expressway.
There are no workarounds that address this vulnerability.
This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161207-expressway
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Vulnerable Products
This vulnerability affects Cisco Expressway Series Software and Cisco TelePresence Video Communication Server (VCS). For information about affected software releases, consult the Cisco bug ID(s) at the top of this advisory.Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by this vulnerability.
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There are no workarounds that address this vulnerability.
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For information about fixed software releases, consult the Cisco bug ID(s) at the top of this advisory.
When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page, to determine exposure and a complete upgrade solution.
In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers.
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Proof-of-concept code that demonstrates an exploit of this vulnerability is publicly available.
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This vulnerability was reported to Cisco by Micha Borrmann of SySS.
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To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco.
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Show LessVersion Description Section Status Date 2.0 Updated to indicate that proof-of-concept code that demonstrates an exploit of this vulnerability is publicly available. Exploitation and Public Announcements Final 2016-December-19 1.0 Initial public release. — Final 2016-December-07
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