Denial of service in Cisco IOS XR - CVE-2017-6731
Published: July 6, 2017
Vulnerability identifier: #VU7365
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2017-6731
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Cisco IOS XR
Cisco IOS XR
Detailed vulnerability description
The vulnerability allows a remote unauthenticated attacker to cause DoS condition.
The weakness exists in Multicast Source Discovery Protocol (MSDP) ingress packet processing for Cisco IOS XR Software due to incorrect error handling of an MSDP packet that contains an error in the packet header. A remote attacker can send a malformed MSDP packet for an established MSDP session and cause the MSDP session to restart.
Successful exploitation of the vulnerability results in denial of service.
The weakness exists in Multicast Source Discovery Protocol (MSDP) ingress packet processing for Cisco IOS XR Software due to incorrect error handling of an MSDP packet that contains an error in the packet header. A remote attacker can send a malformed MSDP packet for an established MSDP session and cause the MSDP session to restart.
Successful exploitation of the vulnerability results in denial of service.
How to mitigate CVE-2017-6731
The vulnerability is addressed in the following versions:
6.3.1.19i.MCAST, 6.2.3.1i.MCAST, 6.2.2.17i.MCAST, 6.1.4.12i.MCAST.
6.3.1.19i.MCAST, 6.2.3.1i.MCAST, 6.2.2.17i.MCAST, 6.1.4.12i.MCAST.