Cisco Security Advisory
Cisco Cloud Services Router 1000V Command Injection Vulnerability
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AV:L/AC:L/Au:S/C:C/I:C/A:C/E:F/RL:U/RC:C
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A vulnerability in the event manager environment and publish-event function of the Cisco Cloud Services Router 1000V Series could allow an authenticated, local attacker to perform a command injection attack with root-level privileges.
The vulnerability is due to a lack of proper input validation of event manager environment variables that are configured on the affected device. An attacker could exploit this vulnerability by authenticating to the device with administrative privileges, modifying the configuration of the device, and then invoking a crafted event manager script. A successful exploit could allow the attacker to compromise the affected system using commands that are executed with root-level privileges.
Cisco has not released software updates that address this vulnerability. Workarounds that mitigate this vulnerability are available.
This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151130-csr
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The 'event manager environment' configuration can be removed and the administrative password can be closely monitored.
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When considering software upgrades, customers are advised to consult the Cisco Security Advisories and Responses 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.
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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.
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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 1.0 Initial public release. - Final 2015-November-30
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