CVE-2020-28942

An issue exists in PrimeKey EJBCA before 7.4.3 when enrolling with EST while proxied through an RA over the Peers protocol. As a part of EJBCA's domain security model, the peer connector allows the restriction of client certificates (for the RA, not the end user) to a limited set of allowed CAs, thus restricting the accessibility of that RA to the rights it has within a specific role. While this works for other protocols such as CMP, it was found that the EJBCA enrollment over an EST implementation bypasses this check, allowing enrollment with a valid client certificate through any functioning and authenticated RA connected to the CA. NOTE: an attacker must already have a trusted client certificate and authorization to enroll against the targeted CA.

CVSS v3 4.3 MEDIUM
CVSS v2.0 4.0 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

4.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:S/C:N/I:P/A:N

Exploitability : 8.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact NONE

Integrity Impact PARTIAL

Availability Impact NONE

References

Link	Resource
https://support.primekey.com/news/posts/40	Vendor Advisory
https://support.primekey.com/news/posts/40	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:primekey:ejbca:*:*:*:*:enterprise:*:*:*

History

21 Nov 2024, 05:23

Type	Values Removed	Values Added
References	~~() https://support.primekey.com/news/posts/40 - Vendor Advisory~~	() https://support.primekey.com/news/posts/40 - Vendor Advisory

Information

Published : 2020-11-19 17:15

Updated : 2024-11-21 05:23

NVD link : CVE-2020-28942

Mitre link : CVE-2020-28942

CVE.ORG link : CVE-2020-28942

JSON object : View

Products Affected

primekey

ejbca

CWE

CWE-295

Improper Certificate Validation

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