Cisco Security Advisory
Cisco TelePresence MCU Software Memory Exhaustion Vulnerability
AV:N/AC:L/Au:N/C:N/I:N/A:C/E:H/RL:OF/RC:C
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A vulnerability in the network stack of Cisco TelePresence MCU Software could allow an unauthenticated, remote attacker to cause the exhaustion of available memory which could lead to system instability and a reload of the affected system.
Cisco has released software updates that address this vulnerability. Workarounds that mitigate this vulnerability are not available. This advisory is available at the following link:
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20141015-mcu
Note: This security advisory does not provide information about the GNU Bash Environment Variable Command Injection Vulnerability (also known as Shellshock). For additional information regarding Cisco products affected by this vulnerability, refer to the Cisco Security Advisory at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140926-bash
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Vulnerable Products
The following products running a vulnerable version of software are affected by this vulnerability:
- Cisco TelePresence MCU 4200 Series
- Cisco TelePresence MCU 4500 Series
- Cisco TelePresence MCU MSE 8420
Products Confirmed Not Vulnerable
The following products are not affected by this vulnerability:
- Cisco TelePresence MCU 5300 Series
- Cisco TelePresence MCU MSE 8510
- Cisco TelePresence Server MSE 8710
- Cisco TelePresence Server
No other Cisco products are currently known to be affected by this vulnerability.
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Cisco TelePresence Infrastructure offers a wide range of products to scale and manage the Cisco TelePresence solution. The Cisco TelePresence Infrastructure solution includes Cisco TelePresence MCU products which are a range of advanced MCUs, that are designed to combine continuous presence with high-definition video and voice quality, and Cisco TelePresence Server which connects users to a wide range of endpoints and multivendor telepresence systems.
A vulnerability in the network stack of Cisco TelePresence MCU Software could allow an unauthenticated, remote attacker to cause the exhaustion of available memory which could lead to system instability and a reload of the affected system.
The vulnerability is due to insufficient sanitization of crafted TCP packets. An attacker could exploit this vulnerability by sending a sequence of crafted TCP packets to the affected system.
This vulnerability is described in Cisco bug ID CSCtz35468 (registered customers only) has been assigned the Common Vulnerabilities and Exposures (CVE) Identifier CVE-2014-3397.
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There are no workarounds that mitigate this vulnerability
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When considering software upgrades, customers are advised to consult the Cisco Security Advisories, Responses, and Notices archive at http://www.cisco.com/go/psirt and review subsequent advisories 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.
Note: This security advisory does not provide information about the GNU Bash Environment Variable Command Injection Vulnerability (also known as Shellshock). Customer should refer to the Cisco Security Advisory at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20140926-bash before making decisions about the Cisco TelePresence MCU Software version.
This vulnerability is fixed in Cisco TelePresence MCU Software 4.3(2.30) and later.
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The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.
This vulnerability was found during the resolution of a support case.
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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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Revision 1.0 2014-October-15 Initial public release
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