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CVE Record

CVE-2024-6592: WatchGuard Firebox Single Sign-On Agent Protocol Authorization Bypass

An incorrect authorization vulnerability in the protocol communication between the WatchGuard Authentication Gateway (aka Single Sign-On Agent) on Windows and the WatchGuard Single Sign-On Client on Windows and MacOS allows an attacker with network access to forge communications to affected components. In the event an attacker has already gained network access, they could exploit this vulnerability to retrieve authenticated usernames and group memberships from the Single Sign-On Agent or send arbitrary account and group information to the Single Sign-On Agent for their host. This vulnerability cannot be used by an attacker to gain access to user credentials.

CriticalCVSS 9.3Not KEV-listedUpdated
Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

An attacker already able to reach the WatchGuard SSO network components could impersonate trusted communications. This may expose authenticated usernames and group memberships or let the attacker submit false account and group data for their host. The issue does not disclose user credentials, but manipulated identity information could undermine access decisions.

Executive priority

Treat as an urgent identity-control issue where WatchGuard SSO is deployed. Prioritize environments where untrusted, user, wireless, or compromised segments can reach SSO components. This is critical by score, but urgency depends materially on deployment presence and network reachability. Require owners to confirm affected versions and vendor remediation promptly.

Technical view

CVE-2024-6592 is a missing or incorrect protocol authorization weakness between the Windows WatchGuard Authentication Gateway/SSO Agent and Windows or macOS SSO Clients. Network-reachable, unauthenticated attackers can forge protocol messages, affecting confidentiality and integrity without reported availability impact. The supplied CVSS 4.0 score is 9.3 and maps to CWE-306.

Likely exposure

Exposure requires network access to the affected SSO communication path. Organizations using WatchGuard SSO Agent and SSO Client components should investigate. The supplied version data lists 12.0 but marks entries unaffected, so the exact vulnerable release range is unclear from this bundle and must be confirmed through WatchGuard guidance.

Exploitation context

The bundle does not establish active exploitation, and the CVE is not listed as KEV. Exploitation nevertheless appears low-complexity once an attacker has network reachability: no privileges or user interaction are indicated. Impact is limited to SSO identity and group information; the cited description explicitly says credentials cannot be obtained through this vulnerability.

Researcher notes

The core security boundary is protocol authorization, not credential storage. Investigation should focus on forged client-to-agent communications, disclosure of authenticated identity metadata, and injected host account or group assertions. Avoid assuming authentication bypass directly grants firewall access; the bundle establishes identity-data manipulation but does not describe downstream policy behavior. Exact affected versions and fixes remain insufficiently specified here.

Mitigation direction

  • Review WatchGuard advisories and apply the vendor-supported update or mitigation for deployed SSO components.
  • Restrict SSO protocol access to explicitly authorized clients and trusted network segments.
  • Reduce unnecessary network paths to the Windows SSO Agent and Authentication Gateway.
  • Monitor SSO identity and group submissions for unexpected hosts, accounts, or membership changes.

Validation and detection

  • Inventory WatchGuard SSO Agents and Clients, recording operating systems and exact installed versions.
  • Confirm affected status against WatchGuard guidance because the supplied version metadata is internally inconsistent.
  • Map which hosts and network segments can reach the SSO communication interfaces.
  • Review SSO logs for unusual username lookups, group queries, or host identity updates.
  • After remediation, verify unauthorized network sources cannot communicate with the SSO components.
Prepared
Confidence
high
Sources
5

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-306: 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
description · low confidence lookup

Privilege behavior lookup

The CVE wording references privilege impact, so privilege escalation and authorization behavior 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-2024-6592 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
Critical
CVSS
9.3 (4.0)
Known Exploited
No
Published

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

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.

1CVSS vectors
3Timeline events
1ADP providers
4Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: total

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
9.3CVSS 4.0CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:NWatchGuard

Vulnerability scoring details

Base CVSS 4.0 score

9.3Critical
CVSS 4.0 vector shape for CVE-2024-6592Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
WatchGuardSSO Client12.0unaffected
WatchGuardSSO Client12.0unaffected
WatchGuardSSO Agent12.0unaffected
Weakness

CWE details

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

CWE-306 · source CWE mapping

Missing Authentication for Critical Function

Missing Authentication for Critical Function represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.