Cisco Security Advisory
Cisco ASR 5000 Series ipsecmgr Service Denial of Service Vulnerability
A vulnerability in the IPsec component of StarOS for Cisco ASR 5000 Series routers could allow an unauthenticated, remote attacker to terminate all active IPsec VPN tunnels and prevent new tunnels from establishing, resulting in a denial of service (DoS) condition.
The vulnerability is due to improper processing of Internet Key Exchange (IKE) messages. An attacker could exploit this vulnerability by sending crafted IKE messages toward the router. An exploit could allow the attacker to cause a reload of the ipsecmgr service. A reload of the ipsecmgr service might result in all IPsec VPN tunnels being terminated and new tunnels being unable to establish until the service has restarted, resulting in a denial of service (DoS) condition.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
This advisory is available at the following link:
Vulnerable ProductsThis vulnerability affects the following Cisco products:
- Cisco ASR 5000/5500 Series routers
- Cisco Virtualized Packet Core (VPC)
Products Confirmed Not VulnerableNo other Cisco products are currently known to be affected by this vulnerability.
There are no workarounds that address this vulnerability.
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.
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.
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.
Version Description Section Status Date 1.0 Initial public release. - Final 2016-November-16
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