What is the CVSS score of CVE-2024-6156?

CVE-2024-6156 has a CVSS 3.1 base score of 3.8 (Low). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N. EPSS exploitation probability: 0.2%.

Is there a public PoC exploit available for CVE-2024-6156?

Yes, a public proof-of-concept exploit is available for CVE-2024-6156. Prioritise patching immediately. EPSS: 0.2%.

Is there a patch available for CVE-2024-6156?

Yes, a patch is available for CVE-2024-6156. Update the affected software to the latest version immediately.

Lxd CVE-2024-6156

LOW

Improper Certificate Validation (CWE-295)

2024-12-06 security@ubuntu.com

Authentication Bypass Canonical Lxd

3.8

CVSS 3.1 · Vendor: ubuntu

View

Vulnerability Assessment

Weakness	CWE CWE-295 OWASP Top 10:2025 A07:2025 - Authentication Failures ASVS 5.0 V12 - Secure Communication Certificate validation
Impact	CVSS score of 3.8 (LOW). Attack characteristics: local attack vector, low complexity, low privileges required, no user interaction not required. Public proof-of-concept exploit code is available.
Exploit ScenarioDerived	Successful exploitation could compromise the low-severity affected system.

Monitor Track and reassess. Why: LOW severity (CVSS 0.1-3.9).

Patch available 0.2% exploitation probability (EPSS)

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AnalysisAI

Mark Laing discovered that LXD's PKI mode, until version 5.21.2, could be bypassed if the client's certificate was present in the trust store. Rated low severity (CVSS 3.8), this vulnerability is low attack complexity. Public exploit code available and no vendor patch available.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affected Packages

go github.com/canonical/lxd fix: 0.0.0-20240708073652-5a492a3f0036

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in go

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

This vulnerability is classified under CWE-295. Mark Laing discovered that LXD's PKI mode, until version 5.21.2, could be bypassed if the client's certificate was present in the trust store. Affected products include: Canonical Lxd. Version information: version 5.21.2.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

Vendor (ubuntu) PRIMARY 3.8 LOW

AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N

Primary rating from Vendor (ubuntu) · only source for this CVE.

CVSS VectorVendor: ubuntu

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

Low

Integrity

None

Availability

None

DescriptionCVE.org

Mark Laing discovered that LXD's PKI mode, until version 5.21.2, could be bypassed if the client's certificate was present in the trust store.

Threat Intelligence Overview

EPSS Score

0.2%

Top 95% exploitable

Exploit

POC

Public exploit code exists

Data Quality

3 sources

Confidence: Low

NVD

CVE.org

EPSS

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 LOW

CISA KEV No

Public POC Yes

EPSS 0.2%

Patch available Yes

Active threat No

Deciding rule

LOW severity (CVSS 0.1-3.9)

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

Defer

Exploitation· derived

Poc

System Exposure· derived

Small

Automatable· derived

Human Impact· derived

Low

Priority Score

Low Medium High Critical

KEV: 0

EPSS: 0

CVSS: +19

PoC: +20

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.

Affected Products (CPE)CVE.org

cpe:2.3:a:canonical:lxd:*:*:*:*:*:*:*:*

More in Lxd

View all

CVE-2025-54286 HIGH This Week POC

7.5 Oct 02

Cross-site request forgery in the LXD-UI component of Canonical LXD 5.0 before 5.0.5, 5.1 before 5.21.4, and 6.0 before

CVE-2025-54289 HIGH This Week POC

7.4 Oct 02

Privilege escalation in Canonical LXD's operations API (LXD before 6.5 and LXD 5.21 before 5.21.4) allows an authenticat

CVE-2025-54293 HIGH This Week POC

7.1 Oct 02

Authenticated remote attackers with access to the Canonical LXD instance log retrieval or deletion endpoints can read ar

CVE-2025-54287 HIGH This Week POC

7.1 Oct 02

Server-side template injection in Canonical LXD's instance snapshot naming feature lets an authenticated user who can mo

CVE-2025-54290 MEDIUM This Month POC

6.9 Oct 02

Unauthenticated project enumeration in Canonical LXD 5.21.x before 5.21.4 and 6.x before 6.5 lets remote attackers deter

CVE-2025-54291 MEDIUM This Month POC

6.9 Oct 02

Unauthenticated remote attackers can confirm the existence of LXD projects on Canonical LXD by comparing HTTP status cod

CVE-2026-63294 CRITICAL Act Now

9.9 Aug 12

Privilege escalation to host root in Canonical LXD occurs when the container manager unpacks crafted image or backup arc

CVE-2026-66897 CRITICAL Act Now

9.9 Aug 24

Host root code execution in Canonical LXD arises from a path-traversal flaw in instance template processing, letting an

CVE-2026-112816 CRITICAL Act Now

10.0 Oct 30

Improper certificate validation in the HTTPS API listener of Canonical LXD lets an unauthenticated remote attacker prese

CVE-2026-63293 CRITICAL Act Now

9.9 Aug 12

Arbitrary host file read and write in Canonical LXD occurs because the image import/unpack routine does not verify wheth

CVE-2026-63298 CRITICAL Act Now

9.9 Aug 12

Canonical LXD's NVIDIA GPU passthrough configuration handler fails to sanitize newline characters in user-supplied `nvid

CVE-2026-66898 CRITICAL Act Now

9.9 Aug 12

Path traversal in Canonical's LXD container and VM manager allows a user with backup import/restore privileges to write

Same weakness CWE-295 – Improper Certificate Validation

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CVE-2026-85102 CRITICAL POC

9.8

CVE-2015-3152 MEDIUM POC

5.9

CVE-2017-2800 CRITICAL POC

9.8

CVE-2014-1266 HIGH POC

7.4

CVE-2022-47758 CRITICAL POC

9.8

CVE-2025-68121 CRITICAL POC

10.0

CVE-2025-29331 CRITICAL POC

9.8

CVE-2025-32878 CRITICAL POC

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Same technique Authentication Bypass

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CVE-2015-3306 CRITICAL POC

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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

References

Advisories & patches

REF https://www.cve.org/CVERecord?id=CVE-2024-6156

Search Externally

GitHub PoC

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