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CVE-2025-13609

HIGH
Use of Multiple Resources with Duplicate Identifier (CWE-694)
2025-11-24 secalert@redhat.com GHSA-xh5w-g8gq-r3v9
Authentication Bypass
8.2
CVSS 3.1 · Vendor: redhat
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Vulnerability Assessment

Weakness
CWE
CWE-694
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V6 - Authentication Use of multiple resources in auth
Impact

Despite the high CVSS score of 8.2, the real-world risk appears moderate based on multiple indicators. The CVSS vector shows this requires high privileges (PR:H) and network access (AV:N) with low complexity (AC:L), suggesting an insider threat or compromised administrator scenario. The EPSS score of 0.07% places it in the 21st percentile, indicating very low exploitation probability in the wild. The vulnerability is not listed in CISA KEV and no proof-of-concept code is referenced. The changed scope (S:C) and high integrity impact (I:H) are concerning for environments relying on TPM attestation, but the prerequisite of high privileges significantly limits the attack surface compared to unauthenticated vulnerabilities.
Exploit ScenarioDerived

An attacker with administrative access to the Keylime infrastructure registers a malicious agent using their own TPM device but claims the UUID of an existing legitimate agent. Once registered, the attacker's agent replaces the legitimate one in the system, allowing them to respond to attestation challenges and potentially hide malicious activities or compromised system states. The network-based attack vector and low complexity mean this could be executed remotely by any user with sufficient privileges in the Keylime system.
This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.1% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 19, 2026

A critical authentication bypass vulnerability in Keylime allows attackers with high privileges to register malicious agents using different TPM devices while claiming existing agent UUIDs, effectively overwriting legitimate agent identities. This enables impersonation of trusted agents and potential bypass of security controls in the remote attestation system. With an EPSS score of 0.07% (21st percentile) and no known KEV listing, the vulnerability has a high CVSS score of 8.2 but relatively low real-world exploitation likelihood.

RemediationAI

Apply the security updates provided in the Red Hat Security Advisories corresponding to your specific Red Hat product version. For direct Keylime deployments, monitor the upstream GitHub issue 1820 for patches and update to the fixed version once available. As a temporary mitigation, implement strict access controls and monitoring for agent registration activities, limiting who can register new agents to the Keylime system. Consider implementing additional authentication mechanisms or network segmentation to prevent unauthorized agent registration attempts until patches are applied.

Affected Packages

pypi keylime fix: 7.13.0

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in pypi

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Technical ContextAI · show details

Keylime is an open-source remote attestation solution that leverages Trusted Platform Module (TPM) technology to verify system integrity. The vulnerability stems from CWE-694 (Use of Multiple Resources with Duplicate Identifier), where the system fails to properly validate that a registering agent's claimed UUID matches its TPM device identity. This allows an attacker to claim an existing agent's UUID during registration, effectively hijacking that agent's identity within the attestation framework. The flaw fundamentally breaks the trust model of TPM-based attestation by allowing identity substitution.

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Severity by source

Vendor (redhat) PRIMARY 8.2 HIGH
AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:H/A:L
SUSE HIGH
Red Hat 8.2 HIGH

Primary rating from Vendor (redhat).

CVSS VectorVendor: redhat

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
High
Availability
Low

Lifecycle Timeline

2
Patch released
Mar 31, 2026 - 21:13 nvd
Patch available
CVE Published
Nov 24, 2025 - 18:15 nvd
HIGH 8.2

DescriptionCVE.org

A vulnerability has been identified in keylime where an attacker can exploit this flaw by registering a new agent using a different Trusted Platform Module (TPM) device but claiming an existing agent's unique identifier (UUID). This action overwrites the legitimate agent's identity, enabling the attacker to impersonate the compromised agent and potentially bypass security controls.

Executive ViewAI

Why It Matters

Organizations using A vulnerability face notable risk from CVE-2025-13609 rated CVSS 8.2. Successful exploitation could significantly impact the confidentiality, integrity, or availability of affected systems. Organizations should apply vendor updates when available and consider compensating controls in the interim.

Business Impact: High
Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls to limit exposure; (2) Enable enhanced monitoring and alerting; (3) Apply principle of least privilege.

Threat Intelligence Overview

EPSS Score
0.1%
Top 79% exploitable
Threat Intel
1
1 source
Data Quality
5 sources
Confidence: Medium
NVD CVE.org EPSS GHSA Vendor GitHub

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity HIGH
CISA KEV No
Public POC No
EPSS 0.1%
Patch available Yes
Active threat No
Deciding rule
HIGH severity (CVSS 7.0-8.9)
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
None
System Exposure· derived
Open
Automatable· derived
No
Human Impact
High

Priority Score

41
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +41
PoC: 0
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Authentication Bypass CRITICAL

Authentication bypass attacks exploit flaws in the verification mechanisms that control access to systems and applications.

Same weakness CWE-694 – Use of Multiple Resources with Duplicate Identifier

View all
CVE-2026-71327 HIGH POC
7.6
CVE-2021-3436 MEDIUM POC
6.5
CVE-2026-63976 HIGH
8.8
CVE-2026-102634 HIGH
8.7
CVE-2025-59048 HIGH
8.1
CVE-2026-57024 MEDIUM
6.9
CVE-2023-20100 MEDIUM
6.8
CVE-2026-78359 MEDIUM
5.4

Same technique Authentication Bypass

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CVE-2015-3306 CRITICAL POC
10.0
CVE-2023-22515 CRITICAL POC
9.8
CVE-2012-4681 CRITICAL POC
9.8
CVE-2013-2465 CRITICAL POC
9.8
CVE-2011-3544 CRITICAL POC
9.8
CVE-2022-40684 CRITICAL POC
9.8
CVE-2025-61882 CRITICAL POC
9.8
CVE-2024-0012 CRITICAL POC
9.3

Vendor StatusVendor

SUSE

Severity: High
Product Status
SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise High Performance Computing 15 SP7 SUSE Linux Enterprise Module for Basesystem 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS Fixed

References

Advisories & patches
ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:21194/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2026:0217/ REF https://access.redhat.com/errata/RHSA-2025:23201 REF https://access.redhat.com/errata/RHSA-2025:23210 REF https://access.redhat.com/errata/RHSA-2025:23628 REF https://access.redhat.com/errata/RHSA-2025:23735 REF https://access.redhat.com/errata/RHSA-2025:23852 REF https://access.redhat.com/errata/RHSA-2026:0429 REF https://access.redhat.com/security/cve/CVE-2025-13609 REF https://bugzilla.redhat.com/show_bug.cgi?id=2416761 REF https://github.com/keylime/keylime/issues/1820

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