CVE-2017-12236: n/a Cisco IOS XE vulnerability

CVE-2017-12236: A vulnerability in the implementation of the Locator/ID Separation Protocol (LISP) in Cisco IOS XE 3.2 thro...

A vulnerability in the implementation of the Locator/ID Separation Protocol (LISP) in Cisco IOS XE 3.2 through 16.5 could allow an unauthenticated, remote attacker using an x tunnel router to bypass authentication checks performed when registering an Endpoint Identifier (EID) to a Routing Locator (RLOC) in the map server/map resolver (MS/MR). The vulnerability is due to a logic error introduced via a code regression for the affected software. An attacker could exploit this vulnerability by sending specific valid map-registration requests, which will be accepted by the MS/MR even if the authentication keys do not match, to the affected software. A successful exploit could allow the attacker to inject invalid mappings of EIDs to RLOCs in the MS/MR of the affected software. This vulnerability affects Cisco devices that are configured with LISP acting as an IPv4 or IPv6 map server. This vulnerability affects Cisco IOS XE Software release trains 3.9E and Everest 16.4. Cisco Bug IDs: CSCvc18008.

UnknownCVSS not scoredNot KEV-listedUpdatedAug 5, 2024, 18:28 UTC (UTC+00:00)

Security readout for executives and security teams

This Cisco IOS XE issue could let a remote, unauthenticated attacker register false network location mappings in LISP map-server infrastructure. The business risk depends on whether LISP map server/map resolver is enabled, but affected edge or routing infrastructure could make traffic reach the wrong destination. Exposure appears limited to Cisco IOS XE devices configured with LISP acting as an IPv4 or IPv6 map server. The bundle names IOS XE 3.2 through 16.5 and specifically references release trains 3.9E and Everest 16.4. Treat this as high priority where LISP map-server services exist, especially on shared or externally reachable routing infrastructure. If LISP is not deployed, practical exposure is likely low. Mitigation focus: Inventory Cisco IOS XE devices running LISP map server or map resolver roles.; Review Cisco advisory cisco-sa-20170927-lisp for fixed-release and workaround guidance.; Prioritize remediation for internet-reachable or untrusted-peer LISP control-plane exposure..

Prepared: Jun 12, 2026, 20:56 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-287: Credential and account abuse lookup

Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup

cve · low confidence lookup

CVE-2017-12236 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup

Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Sep 28, 2017, 07:00 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

0Timeline events

0ADP providers

2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

CVE List V5 sourceCVE List V5
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-lispCVE reference · x_refsource_CONFIRM

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

n/aCisco IOS XECisco IOS XEListed

Weakness

CWE details

CWE-287

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.