Cisco Security Advisory
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AV:N/AC:H/Au:N/C:N/I:N/A:C/E:F/RL:OF/RC:C
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A vulnerability in the Embedded Services Processor (ESP) module of Cisco ASR 1000 Series Routers running Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition.
The vulnerability is due to improper handling of malformed H.323 packets by an affected device when the device is configured to use Network Address Translation (NAT). An unauthenticated, remote attacker could exploit this vulnerability by sending malformed H.323 packets to a targeted device. A successful exploit could cause the ESP module on the device to crash, resulting in a DoS condition.
Cisco has confirmed the vulnerability and released software updates.
To exploit this vulnerability, an attacker may need to obtain additional information such as whether the targeted device is configured to use NAT. In addition, the attacker may need access to trusted, internal networks to send H.323 packets to the device. These requirements could limit the possibility of a successful exploit.
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Cisco has released bug ID CSCup21070 for registered users that contains additional details and an up-to-date list of affected product versions.
Vulnerable Products
At the time this alert was first published, Cisco IOS XE Software for Cisco ASR 1000 Series Routers version 3.10.2S was vulnerable. Other versions of Cisco IOS XE Software for Cisco ASR 1000 Series Routers may also be affected.Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by these vulnerabilities.
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Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators are advised to monitor affected systems.
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Cisco customers with active contracts can obtain updates through the Software Center at the following link: Cisco. Cisco customers without contracts can obtain upgrades by contacting the Cisco Technical Assistance Center at 1-800-553-2447 or 1-408-526-7209 or via email at tac@cisco.com.
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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 Release NA Final 2015-Apr-03
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