CVE-2023-1894

A Regular Expression Denial of Service (ReDoS) issue was discovered in Puppet Server 7.9.2 certificate validation. An issue related to specifically crafted certificate names significantly slowed down server operations.

Published: 2023-05-04 Last update: 2025-01-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-1894 is rated Low Risk (26.9/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.05%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-1894

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-01-27 0.04% 0.05% +0.01%
2 2025-11-21 0.22% 0.04% -0.17%
3 2025-11-18 — 0.22% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-1894

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 1.4 [email protected]
5.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 3.9 1.4 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2023-1894

OS Trackers for CVE-2023-1894

vendor priority summary link
debian unimportant CVE-2023-1894 unimportant priority: Debian including 2 source packages (puppet, puppetserver), 4 status rows across 4 suites (bookworm, bullseye, sid, trixie): resolved 4. https://security-tracker.debian.org/tracker/CVE-2023-1894
redhat medium — https://access.redhat.com/security/cve/CVE-2023-1894
suse medium CVE-2023-1894 severity moderate: SUSE including 2 source package names (puppet, puppet-server), 3 product×package rows across 2 product lines (SUSE Linux Enterprise Module for Advanced Systems Management 12, SUSE Linux Enterprise Server 11 SP3 for Teradata): Known Not Affected 3. https://www.suse.com/security/cve/CVE-2023-1894/
ubuntu medium CVE-2023-1894 medium priority: Ubuntu including 2 source packages (puppet, puppetserver), 26 status rows across 13 suites (bionic, focal, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 10, needs-triage 8, ignored 7, not-affected 1. https://ubuntu.com/security/CVE-2023-1894

Affected software / configurations for CVE-2023-1894

Vendor Product Version Raw CPE
puppet puppet_enterprise 2021.7.1 cpe:2.3:a:puppet:puppet_enterprise:2021.7.1:*:*:*:*:*:*:*
puppet puppet_enterprise 2023.0 cpe:2.3:a:puppet:puppet_enterprise:2023.0:*:*:*:*:*:*:*
puppet puppet_server 7.9.2 cpe:2.3:a:puppet:puppet_server:7.9.2:*:*:*:*:*:*:*

References for CVE-2023-1894

cvelogic Threat Intelligence