Cisco Security Advisory
Click Icon to Copy Verbose Score
AV:N/AC:L/Au:N/C:N/I:P/A:N/E:F/RL:OF/RC:C
-
A vulnerability in the Protocol Independent Multicast (PIM) application of the Cisco Adaptive Security Appliance (ASA) could allow an unauthenticated, remote attacker to disrupt the multicast traffic forwarding on the affected device via a denial-of-service (DoS) attack.
The vulnerability is due to an inconsistency in how the PIM registration is implemented for multicast forwarding. An attacker could exploit this vulnerability by sending a crafted multicast packet to the affected device. An exploit could allow the attacker to disrupt the multicast forwarding via a DoS attack.
Cisco has confirmed the vulnerability and software updates are available.
To exploit this vulnerability, an attacker may need access to trusted, internal networks to send specially crafted multicast packets to the affected device. This access requirement may reduce the likelihood of a successful exploit.
An attacker may need to acquire additional information about the targeted device prior to an exploit attempt, such as whether the device is running with a multicast configuration. A multicast configuration is needed for a successful exploit.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
-
Cisco has released bug ID CSCus74398 for registered users, which contains additional details and an up-to-date list of affected product versions.
Vulnerable Products
At the time this alert was first published, Cisco ASA releases 100.13(0.21), 100.13(20.3), 100.13(21.9), 100.14(1.1), 9.2(0.0), 9.2(0.104), 9.2(3.1), 9.2(3.4), 9.3(1.105), 9.3(2.100), and 9.4(0.115) were vulnerable. Later releases of Cisco ASA may also be vulnerable.Products Confirmed Not Vulnerable
No other Cisco products are currently known to be affected by these vulnerabilities.
-
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have network access.
Administrators can help protect affected systems from external attacks by using a solid firewall strategy.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators are advised to monitor affected systems.
-
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.
-
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.
-
Show LessVersion Description Section Status Date 1.0 Initial Release NA Final 2015-May-20
-
THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A stand-alone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy, and may lack important information or contain factual errors. The information in this document is intended for end-users of Cisco products.