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CVE Record

CVE-2017-12161: It was found that keycloak before 3.4.2 final would permit misuse of a client-side /etc/hosts entry to spoo...

It was found that keycloak before 3.4.2 final would permit misuse of a client-side /etc/hosts entry to spoof a URL in a password reset request. An attacker could use this flaw to craft a malicious password reset request and gain a valid reset token, leading to information disclosure or further attacks.

UnknownCVSS not scoredNot KEV-listedUpdated
Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2017-12161 affects Red Hat Keycloak versions before 3.4.2.Final. The issue let a password reset request use a spoofed URL based on a client-side hosts-file manipulation, potentially exposing a valid reset token. The public bundle does not provide CVSS scoring or evidence of active exploitation.

Executive priority

Treat this as a targeted identity-platform risk for legacy Keycloak deployments. Prioritize inventory and upgrade verification, especially where Keycloak handles password resets for privileged or externally accessible accounts.

Technical view

The CVE describes a Keycloak password reset URL spoofing weakness classified as CWE-602. An attacker could craft a malicious password reset request and obtain a valid reset token, enabling information disclosure or follow-on attacks. Sources identify Keycloak before 3.4.2.Final as affected.

Likely exposure

Exposure is likely limited to organizations still running Keycloak versions before 3.4.2.Final. Systems using Keycloak for user password resets are the relevant surface. The bundle does not identify affected deployment configurations beyond the version boundary.

Exploitation context

The source bundle does not show KEV listing, public exploitation, or exploit maturity. It describes attacker misuse of a client-side /etc/hosts entry to spoof a reset URL and obtain a reset token, but does not provide enough evidence to assess real-world exploitation likelihood.

Researcher notes

Evidence is sparse: no CVSS vector, no KEV status, and no detailed vendor advisory text in the bundle. Anchor assessment to the stated version range, CWE-602 classification, password reset token exposure, and referenced Red Hat/Keycloak materials.

Mitigation direction

  • Inventory Keycloak deployments and identify versions before 3.4.2.Final.
  • Update affected Keycloak deployments to 3.4.2.Final or later where applicable.
  • Review Red Hat and Keycloak guidance for any version-specific remediation details.
  • Check password reset URL behavior after remediation.

Validation and detection

  • Confirm deployed Keycloak versions are 3.4.2.Final or later.
  • Review password reset flows for unexpected hostnames in generated links.
  • Check logs for suspicious password reset requests around affected systems.
  • Verify vulnerability scanner findings against actual Keycloak version evidence.
Prepared
Confidence
medium
Sources
4

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 · low confidence lookup

CWE-602: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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.

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description · low confidence lookup

Credential and access behavior lookup

The CVE wording references authentication or credential exposure, so valid-account and credential-access review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2017-12161 mapping review

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

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
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
3Source links

CVSS and timeline data

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

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Red Hat, Inc.Keycloakbefore 3.4.2.FinalListed
Weakness

CWE details

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

CWE-602 · source CWE mapping

Client-Side Enforcement of Server-Side Security

Client-Side Enforcement of Server-Side Security represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.