CVE-2017-12238

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Summary

CVECVE-2017-12238
StatePUBLISHED
Assignercisco
Source PriorityCVE Program / NVD first with legacy fallback
Published2017-09-29 01:34:48 UTC
Updated2026-04-21 18:08:05 UTC
DescriptionA vulnerability in the Virtual Private LAN Service (VPLS) code of Cisco IOS 15.0 through 15.4 for Cisco Catalyst 6800 Series Switches could allow an unauthenticated, adjacent attacker to cause a C6800-16P10G or C6800-16P10G-XL type line card to crash, resulting in a denial of service (DoS) condition. The vulnerability is due to a memory management issue in the affected software. An attacker could exploit this vulnerability by creating a large number of VPLS-generated MAC entries in the MAC address table of an affected device. A successful exploit could allow the attacker to cause a C6800-16P10G or C6800-16P10G-XL type line card to crash, resulting in a DoS condition. 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. Cisco Bug IDs: CSCva61927.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.010140000 probability, percentile 0.771950000 (date 2026-04-22)

CISA KEV: Listed on 2022-03-03; due 2022-03-24; ransomware use Unknown

Problem Types: CWE-399 | NVD-CWE-noinfo | CWE-399 CWE-399

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.5MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1ADPDECLARED6.5MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary6.5MEDIUMCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
2.0[email protected]Primary3.3AV:A/AC:L/Au:N/C:N/I:N/A:P

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0 Breakdown

Access Vector
Adjacent
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial

AV:A/AC:L/Au:N/C:N/I:N/A:P

CISA Known Exploited Vulnerability

VendorCisco
ProductCatalyst 6800 Series Switches
NameCisco Catalyst 6800 Series Switches VPLS Denial-of-Service Vulnerability
Required ActionApply updates per vendor instructions.
Noteshttps://nvd.nist.gov/vuln/detail/CVE-2017-12238

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Cisco C6800-16p10g - All All All
Hardware Cisco C6800-16p10g-xl - All All All
Hardware Cisco Catalyst 6000 - All All All
Hardware Cisco Catalyst 6000 Ws-svc-nam-1 2.2\(1a\) All All All
Hardware Cisco Catalyst 6000 Ws-svc-nam-1 3.1\(1a\) All All All
Hardware Cisco Catalyst 6000 Ws-svc-nam-2 2.2\(1a\) All All All
Hardware Cisco Catalyst 6000 Ws-svc-nam-2 3.1\(1a\) All All All
Hardware Cisco Catalyst 6000 Ws-x6380-nam 2.1\(2\) All All All
Hardware Cisco Catalyst 6000 Ws-x6380-nam 3.1\(1a\) All All All
Hardware Cisco Catalyst 6500 - All All All
Hardware Cisco Catalyst 6500-e - All All All
Hardware Cisco Catalyst 6500 Ws-svc-nam-1 2.2\(1a\) All All All
Hardware Cisco Catalyst 6500 Ws-svc-nam-1 3.1\(1a\) All All All
Hardware Cisco Catalyst 6500 Ws-svc-nam-2 2.2\(1a\) All All All
Hardware Cisco Catalyst 6500 Ws-svc-nam-2 3.1\(1a\) All All All
Hardware Cisco Catalyst 6500 Ws-x6380-nam 2.1\(2\) All All All
Hardware Cisco Catalyst 6500 Ws-x6380-nam 3.1\(1a\) All All All
Hardware Cisco Catalyst 6503-e - All All All
Hardware Cisco Catalyst 6504-e - All All All
Hardware Cisco Catalyst 6506-e - All All All
Hardware Cisco Catalyst 6509-e - All All All
Hardware Cisco Catalyst 6509-neb-a - All All All
Hardware Cisco Catalyst 6509-v-e - All All All
Hardware Cisco Catalyst 6513 - All All All
Hardware Cisco Catalyst 6513-e - All All All
Operating System Cisco Ios All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na Cisco IOS affected Cisco IOS Not specified

References

ReferenceSourceLinkTags
www.cisa.gov/known-exploited-vulnerabilities-catalog 134c704f-9b21-4f2e-91b3-4a467353bcc0 www.cisa.gov US Government Resource
Malformed Request af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com Broken Link, Third Party Advisory, VDB Entry
Cisco IOS Software for Cisco Catalyst 6800 Series Switches VPLS Denial of Service Vulnerability af854a3a-2127-422b-91ae-364da2661108 tools.cisco.com Vendor Advisory
Cisco IOS on Cisco Catalyst 6800 Series Switch VPLS Memory Management Flaw Lets Remote Users Cause the Target Line Card to Crash - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com Broken Link, Third Party Advisory, VDB Entry
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
CISA Known Exploited Vulnerabilities catalog CISA www.cisa.gov kev
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