CVE-2020-28942

MEDIUM
4.3
CVSS Score
Published: November 19, 2020 at 04:38 PM UTC
Updated: June 17, 2026 at 03:10 AM UTC
1 product affected across 1 vendorEjbca

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Severity
MEDIUM4.3
Exploit prediction
EPSS 0.4%

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 7.4.3
Affected range stops below 7.4.3, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-295

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