CVE-2018-11751

puppet-agent: Puppet Agent does not properly verify SSL connection when downloading a CRL

Severity Score

5.4

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

Previous versions of Puppet Agent didn't verify the peer in the SSL connection prior to downloading the CRL. This issue is resolved in Puppet Agent 6.4.0.

Las versiones anteriores de Puppet Agent no comprobaban el peer en la conexión SSL antes de descargar la CRL. Este problema es resuelto en Puppet Agent versión 6.4.0.

A flaw was found in Puppet, where the Puppet Agent did not verify the peer in the SSL connection before downloading to the Certificate Revocation List (CRL). The primary risk is the availability of communications to computing systems and not Puppet itself. This flaw allows an attacker to submit a phony CRL, potentially denying future automation of systems driven by Puppet.

Red Hat Satellite is a systems management tool for Linux-based infrastructure. It allows for provisioning, remote management, and monitoring of multiple Linux deployments with a single centralized tool. Issues addressed include HTTP request smuggling, cross site scripting, denial of service, memory leak, and traversal vulnerabilities.

*Credits: N/A

CVSS Scores

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

Low

Attack Vector

Adjacent

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

Low

Attack Vector

Adjacent

Attack Complexity

Low

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2018-06-05 CVE Reserved
2019-12-16 CVE Published
2024-08-05 CVE Updated
2025-03-30 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-295: Improper Certificate Validation
CWE-862: Missing Authorization

CAPEC

References (3)

URL	Tag	Source

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
https://puppet.com/security/cve/CVE-2018-11751	2020-04-07
https://access.redhat.com/security/cve/CVE-2018-11751	2020-10-27
https://bugzilla.redhat.com/show_bug.cgi?id=1788261	2020-10-27

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Puppet Search vendor "Puppet"		Puppet Server Search vendor "Puppet" for product "Puppet Server"				>= 6.0.0 < 6.4.0 Search vendor "Puppet" for product "Puppet Server" and version " >= 6.0.0 < 6.4.0"		-		Affected