Cisco Security Advisory
Cisco IOS XR Software SCP and SFTP Modules Denial of Service Vulnerability
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AV:N/AC:L/Au:S/C:N/I:C/A:N/E:F/RL:U/RC:C
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A vulnerability in the Secure Copy Protocol (SCP) and Secure FTP (SFTP) modules of Cisco IOS XR Software could allow an authenticated, remote attacker to overwrite system files and cause a denial of service (DoS) condition.
The vulnerability is due to improper setting of permissions on the filesystem for certain paths that include system files. An attacker could exploit this vulnerability by using either the SCP or SFTP client to overwrite system files on the affected device. An exploit could allow the attacker to overwrite system files and cause a DoS condition.
Cisco has not 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-20160323-ncs
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Workarounds are not available.
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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 1.1 Increased the scope to include all types of devices running Cisco IOS XR. Title, Summary, Vulnerable Products 2016-April-06 1.0 Initial public release. - Final 2016-March-23
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