SecOps SignalSecurity Intelligence Workspace
Loading collection status
Vulnerabilities/CVE-2017-12238Public Intelligence Dossier
Source: cisco · Limited verification•Last verified: •Collection Running
CVE-2017-12238ListedMEDIUM (raw)CVSS 6.5CWE-399

A 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

Published: 29 Sept 2017•Last updated: 17 Jun 2026, 06:32 AM IST•Source identifier: psirt@cisco.com
Dossier completeness: source-provided sections 3 / 3 · rule guidance not available. Missing source facts count as incomplete.
Official source
CISA KEV catalog
Listed
Added03 Mar 2022
Due24 Mar 2022
RansomwareUnknown
CVSS score
6.5MEDIUM (raw)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Metric sourcenvd@nist.gov
EPSS probability
2%0.020
Percentile81st
Weakness type
CWE-399
NVD-CWE-noinfo
Remediation
Patch status unknown
No fixed version or KB recorded

Why It Matters

Analysis dossier

Why It Matters

A 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.

SOC priority

Immediate Attention

Actively exploited (source statement)

Yes

Publicly disclosed

Unknown

Risk basis: CISA KEV exploitation signal; SOC ecosystem technology relevance; Source-confirmed exploitation or CISA KEV/ransomware metadata

Affected Products & Remediation

1 source-backed product
Affected products and versions (source)
  • cisco ios · >= 15.0 <= 15.4 · NVD CPE · Source
NVD applicability prerequisites: cpe:2.3:h:cisco:c6800-16p10g:-:*:*:*:*:*:*:*, cpe:2.3:h:cisco:c6800-16p10g-xl:-:*:*:*:*:*:*:*, cpe:2.3:h:cisco:catalyst_6000:-:*:*:*:*:*:*:*, cpe:2.3:h:cisco:catalyst_6000_ws-svc-nam-1:2.2\(1a\):*:*:*:*:*:*:*, cpe:2.3:h:cisco:catalyst_6000_ws-svc-nam-1:3.1\(1a\):*:*:*:*:*:*:*, cpe:2.3:h:cisco:catalyst_6000_ws-svc-nam-2:2.2\(1a\):*:*:*:*:*:*:*, cpe:2.3:h:cisco:catalyst_6000_ws-svc-nam-2:3.1\(1a\):*:*:*:*:*:*:*, cpe:2.3:h:cisco:catalyst_6000_ws-x6380-nam:2.1\(2\):*:*:*:*:*:*:*, cpe:2.3:h:cisco:catalyst_6000_ws-x6380-nam:3.1\(1a\):*:*:*:*:*:*:*, cpe:2.3:h:cisco:catalyst_6500:-:*:*:*:*:*:*:*. These are conditions, not proof that an environment is exposed or unaffected.
Recorded patch / KBNot provided by source

Vendor or catalog guidance (source)

  • CISA KEV: Apply updates per vendor instructions.

Known exploitation (source facts)

Only what a source states. Unknown means no source has said either way; it is not "not exploited".

CISA KEV
Listed
Exploited (source statement)
Yes
Publicly disclosed (source)
Unknown

CISA required action: Apply updates per vendor instructions.

Suggested hunting (rule-based inference)

SecOps Signal recommendation (rule-based inference). These steps are hunting hypotheses from the vulnerability class; they do not state or imply that exploitation occurred here or anywhere.

No rule-based guidance for this vulnerability class

CISA KEV Record

Catalog entry
03 Mar 2022
Required action due
24 Mar 2022
Known ransomware use
Unknown

Apply updates per vendor instructions.

Change History & Source Data

— No recorded material change

CNA / source
psirt@cisco.com
Record status · verification
UPDATED · CISA KEV confirmed
CPE
cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*, cpe:2.3:h:cisco:c6800-16p10g:-:*:*:*:*:*:*:*, cpe:2.3:h:cisco:c6800-16p10g-xl:-:*:*:*:*:*:*:*, cpe:2.3:h:cisco:catalyst_6000:-:*:*:*:*:*:*:*, cpe:2.3:h:cisco:catalyst_6000_ws-svc-nam-1:2.2\(1a\):*:*:*:*:*:*:*, cpe:2.3:h:cisco:catalyst_6000_ws-svc-nam-1:3.1\(1a\):*:*:*:*:*:*:*, cpe:2.3:h:cisco:catalyst_6000_ws-svc-nam-2:2.2\(1a\):*:*:*:*:*:*:*, cpe:2.3:h:cisco:catalyst_6000_ws-svc-nam-2:3.1\(1a\):*:*:*:*:*:*:*, cpe:2.3:h:cisco:catalyst_6000_ws-x6380-nam:2.1\(2\):*:*:*:*:*:*:*, cpe:2.3:h:cisco:catalyst_6000_ws-x6380-nam:3.1\(1a\):*:*:*:*:*:*:*

Evidence & Provenance

4 public sources
CISA KEV CatalogAdded 2022-03-03tools.cisco.comSource recordnvd.nist.govSource recordcisa.govSource record

Linked by the query's stored exact CVE association. Review required tables and validation status before use.

Detection Hunting Query
Target: DeviceTvmSoftwareVulnerabilities•Defender XDR
Detect endpoints exposed to CVE-2017-12238
Purpose: Exposure assessment (Category: Exposure Check)Why linked: Query metadata names CVE-2017-12238
DeviceTvmSoftwareVulnerabilities| where CveId == "CVE-2017-12238"| project DeviceId, DeviceName, OSPlatform, OSVersion, SoftwareVendor, SoftwareName, SoftwareVersion, CveId, VulnerabilitySeverityLevel, RecommendedSecurityUpdate, RecommendedSecurityUpdateId| sort by VulnerabilitySeverityLevel desc
Schema Checked · Not runtime validatedSource: SecOps Signal deterministic template · Limited verificationStatic screening: Passed structure and schema checks; tenant execution is not verified.
Open KQL Library

Looking up related community queries…

Loading related intelligence

Correlated briefings

SecOps Signal surfaces public advisory facts only. A missing value means the source has not published it, not that your environment is unaffected. No tenant inventory is connected.