Vulnerability Details

Cisco IOS Software Multicast Routing Denial of Service Vulnerabilities

Published: 2016-09-29 08:26:42
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:C

Detection Method:
Checks if a vulnerable version is present on the target host.

Recommendations:
See the referenced vendor advisory for a solution.

Summary:
Multiple vulnerabilities in the multicast subsystem of Cisco IOS Software could allow an unauthenticated, remote attacker to create a denial of service (DoS) condition. The issues are in IPv4 Multicast Source Discovery Protocol (MSDP) and IPv6 Protocol Independent Multicast (PIM).

Technical Details:
The first vulnerability (Cisco bug ID CSCud36767) is due to insufficient checking of MSDP Source-Active (SA) messages received from a configured MSDP peer. An attacker who can send traffic to the IPv4 address of a device could exploit this vulnerability by sending a packet designed to trigger the issue to the affected device. The second vulnerability (Cisco bug ID CSCuy16399) is due to insufficient checking of packets encapsulated in a PIM register message. An attacker who can send a malformed IPv6 PIM register packet to a PIM rendezvous point (RP) could exploit the vulnerability.

Impact:
A successful exploit could cause the affected device to restart.

Detection Type:
Linux Distribution Package

Solution Type:
Vendor Patch

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2016-6392
https://nvd.nist.gov/vuln/detail/CVE-2016-6382

References:

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160928-msdp

Severity
High
CVSS Score
7.8
Published
2016-09-29
Modified
2018-10-29
Category
CISCO

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