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Ubuntu EUVDEUVD-2024-54707

| CVE-2024-6174 HIGH
Improper Authentication (CWE-287)
2025-06-26 security@ubuntu.com
Authentication Bypass Debian Ubuntu Red Hat Canonical Cloud Init Suse
8.8
CVSS 3.1 · NVD
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Vulnerability Assessment

Weakness
CWE
CWE-287
OWASP Top 10:2025
A07:2025 - Authentication Failures
ASVS 5.0
V6 - Authentication Authentication mechanism validation
MITRE ATT&CK

2 techniques across 2 tactics: Defense Evasion, Initial Access

The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up.

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Impact

Unauthorized access to protected functionality, data, or administrative interfaces, potentially leading to full system compromise. With a CVSS score of 8.8 (HIGH), this represents a significant risk.
Exploit ScenarioDerived

An attacker manipulates authentication tokens, exploits logic flaws, or uses default credentials to bypass the login mechanism and access restricted areas.
This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).
Patch available 0.0% exploitation probability (EPSS)

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AnalysisAIv1 – Mar 15, 2026

When a non-x86 platform is detected, cloud-init grants root access to a hardcoded url with a local IP address. To prevent this, cloud-init default configurations disable platform enumeration.

Earlier versions of this analysis (1)
v1 Mar 15, 2026 - 23:54 CVSS 8.8

RemediationAI

Implement robust authentication mechanisms. Use multi-factor authentication. Review authentication logic for bypass conditions. Remove default credentials.

Affected VersionsENISA

cloud-init 0.7.9 <25.1.3

Affected Packages

euvd cloud_init fix: 25.1.3

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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

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Technical ContextAI · show details

An authentication bypass vulnerability allows attackers to circumvent login mechanisms and gain unauthorized access without valid credentials. This vulnerability is classified as Improper Authentication (CWE-287).

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  • Exploit and PoC references, threat intelligence from 22 sources
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Severity by source

NVD PRIMARY 8.8 HIGH
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Ubuntu MEDIUM
SUSE HIGH
Red Hat 8.8 HIGH

Primary rating from NVD.

CVSS VectorNVD

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

2
Patch released
Mar 31, 2026 - 21:13 nvd
Patch available
CVE Published
Jun 26, 2025 - 10:15 nvd
HIGH 8.8

Executive ViewAI

Why It Matters

Organizations using When a non-x86 platform face significant risk from CVE-2024-6174, a improper authentication vulnerability rated CVSS 8.8. Attackers could bypass security controls to gain unauthorized access to protected resources and sensitive data. Organizations should apply vendor updates when available and consider compensating controls in the interim.

Business Impact: Severe
Compensating Controls

Apply vendor patch. If immediate patching is not feasible: (1) Implement network-level access controls; (2) Enable MFA where possible; (3) Monitor authentication logs for anomalous access.

Threat Intelligence Overview

EPSS Score
0.0%
Top 89% exploitable
Data Quality
6 sources
Confidence: High
EUVD NVD CVE.org EPSS 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 0.0%
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
Controlled
Automatable· derived
No
Human Impact
Very High

Priority Score

44
Low Medium High Critical
KEV: 0
EPSS: 0
CVSS: +44
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.

More in Cloud Init

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CVE-2018-10896 HIGH
7.1 Aug 01

The default cloud-init configuration, in cloud-init 0.6.2 and newer, included "ssh_deletekeys: 0", disabling cloud-init'
CVE-2024-11584 MEDIUM
5.9 Jun 26

cloud-init through 25.1.2 includes the systemd socket unit cloud-init-hotplugd.socket with default SocketMode that grant
CVE-2023-1786 MEDIUM
5.5 Apr 26

Sensitive data could be exposed in logs of cloud-init before version 23.1.2. Rated medium severity (CVSS 5.5), this vuln
CVE-2020-8632 MEDIUM
5.5 Feb 05

In cloud-init through 19.4, rand_user_password in cloudinit/config/cc_set_passwords.py has a small default pwlen value,

CVE-2020-8631 MEDIUM
5.5 Feb 05

cloud-init through 19.4 relies on Mersenne Twister for a random password, which makes it easier for attackers to predict

Same weakness CWE-287 – Improper Authentication

View all
CVE-2022-40684 CRITICAL POC
9.8
CVE-2025-61882 CRITICAL POC
9.8
CVE-2020-0688 HIGH POC
8.8
CVE-2023-46805 HIGH POC
8.2
CVE-2023-35078 CRITICAL POC
9.8
CVE-2015-1187 CRITICAL POC
9.8
CVE-2024-7593 CRITICAL POC
9.8
CVE-2017-7921 CRITICAL POC
9.8

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-2024-0012 CRITICAL POC
9.3

Vendor StatusVendor

Ubuntu

Priority: Medium
cloud-init
Release Status Version
mantic ignored end of life, was needs-triage
upstream released 25.1.3
oracular ignored end of life, was needed
bionic released 23.1.2-0ubuntu0~18.04.1+esm1
focal released 24.4.1-0ubuntu0~20.04.3+esm1
jammy released 25.1.4-0ubuntu0~22.04.1
noble released 25.1.4-0ubuntu0~24.04.1
plucky released 25.1.4-0ubuntu0~25.04.1
xenial released 21.1-19-gbad84ad4-0ubuntu1~16.04.4+esm2
trusty DNE -
USN-7677-1

Debian

Bug #1108403
cloud-init
Release Status Fixed Version Urgency
bullseye vulnerable 20.4.1-2+deb11u1 -
bookworm fixed 22.4.2-1+deb12u3 -
trixie fixed 25.1.4-1+deb13u1 -
forky, sid fixed 25.3-2 -
(unstable) fixed 25.1.4-1 -

SUSE

Severity: High
Product Status
Image SL-Micro-Azure Image SL-Micro-BYOS-Azure Image SL-Micro-BYOS-EC2 Image SL-Micro-EC2 Image SUSE-Multi-Linux-Manager-Proxy-BYOS-Azure Image SUSE-Multi-Linux-Manager-Proxy-BYOS-EC2 Image SUSE-Multi-Linux-Manager-Server-Azure-llc Image SUSE-Multi-Linux-Manager-Server-Azure-ltd Image SUSE-Multi-Linux-Manager-Server-BYOS-Azure Image SUSE-Multi-Linux-Manager-Server-BYOS-EC2 Image SUSE-Multi-Linux-Manager-Server-EC2-llc Image SUSE-Multi-Linux-Manager-Server-EC2-ltd Affected
Image SLES-Azure-3P Image SLES-Azure-Basic Image SLES-Azure-Standard Image SLES-BYOS-Azure Image SLES-BYOS-EC2 Image SLES-CHOST-BYOS-Aliyun Image SLES-CHOST-BYOS-Azure Image SLES-CHOST-BYOS-EC2 Image SLES-CHOST-BYOS-GDC Image SLES-CHOST-BYOS-SAP-CCloud Image SLES-EC2 Image SLES-Hardened-BYOS-Azure Image SLES-Hardened-BYOS-EC2 Image SLES-SAP-Azure Image SLES-SAP-Azure-3P Image SLES-SAP-BYOS-Azure Image SLES-SAP-BYOS-EC2 Image SLES-SAPCAL-Azure Image SLES-SAPCAL-EC2 Affected
SUSE Liberty Linux 8 Fixed
SUSE Liberty Linux 9 Fixed
SUSE Linux Enterprise Server 16.0 Fixed

References

Advisories & patches
ADVISORY https://access.redhat.com/errata/RHSA-2025:10844 ADVISORY https://access.redhat.com/errata/RHSA-2025:10848 ADVISORY https://access.redhat.com/errata/RHSA-2025:10876 ADVISORY https://access.redhat.com/errata/RHSA-2025:10879 ADVISORY https://access.redhat.com/errata/RHSA-2025:11295 ADVISORY https://access.redhat.com/errata/RHSA-2025:11324 ADVISORY https://access.redhat.com/errata/RHSA-2025:11337 ADVISORY https://access.redhat.com/errata/RHSA-2025:11339 ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2024-6174 ADVISORY https://ubuntu.com/security/notices/USN-7677-1 ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:20656/ ADVISORY https://www.suse.com/support/update/SUSE-SU-2025:20755/ REF https://github.com/canonical/cloud-init/releases/tag/25.1.3

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