Risk | Low |
Patch available | YES |
Number of vulnerabilities | 1 |
CVE-ID | CVE-2017-12238 |
CWE-ID | CWE-399 |
Exploitation vector | Local network |
Public exploit | Vulnerability #1 is being exploited in the wild. |
Vulnerable software Subscribe |
Cisco Catalyst 6800 Series Switches Hardware solutions / Routers & switches, VoIP, GSM, etc |
Vendor | Cisco Systems, Inc |
Security Bulletin
This security bulletin contains one low risk vulnerability.
EUVDB-ID: #VU8611
Risk: Low
CVSSv3.1: 7.1 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H/E:H/RL:O/RC:C]
CVE-ID: CVE-2017-12238
CWE-ID:
CWE-399 - Resource Management Errors
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a memory management issue when processing MAC entries. A remote attacker with access to local network can create a large number of VPLS-generated MAC entries in the MAC address table of an affected device and cause a C6800-16P10G or C6800-16P10G-XL type line card to crash.
Successful exploitation of the vulnerability may allow an attacker to perform a denial of service (DoS) attack against affected device.
This vulnerability affects Cisco Catalyst 6800 Series Switches that are running a vulnerable release of Cisco IOS Software and have a Cisco C6800-16P10G or C6800-16P10G-XL line card in use with Supervisor Engine 6T. To be vulnerable, the device must also be configured with VPLS and the C6800-16P10G or C6800-16P10G-XL line card needs to be the core-facing MPLS interfaces.
MitigationUpdate to version 15.4(1)IA1.144.
Vulnerable software versionsCisco Catalyst 6800 Series Switches: 15.4.1 IA1.106
External linkshttp://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-vpls
http://bst.cloudapps.cisco.com/bugsearch/bug/CSCva61927
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).
How the attacker can exploit this vulnerability?
The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.
Is there known malware, which exploits this vulnerability?
Yes. This vulnerability is being exploited in the wild.