Is CVE-2023-45129 in the CISA KEV catalog?

No. CVE-2023-45129 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-45129?

CVE-2023-45129 has a CVSS v3 base score of 4.9 (MEDIUM).

What is the EPSS score for CVE-2023-45129?

CVE-2023-45129 has an EPSS score of 1.17% (64th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-45129?

Upgrade matrix-synapse on debian unstable to 1.94.0-1 or later.

CVE & CISA-KEV Catalog

CVE-2023-45129

MEDIUM

4.9

CVSS v3

NVD

Description

Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Prior to version 1.94.0, a malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of service. Homeservers running on a closed federation (which presumably do not need to use server ACLs) are not affected. Server administrators are advised to upgrade to Synapse 1.94.0 or later. As a workaround, rooms with malicious server ACL events can be purged and blocked using the admin API.

CWE-770Allocation of Resources Without Limits or Throttling

How to fix

Remediation Available

matrix-synapseDebian

Fixed in:1.94.0-1CVE-2023-45129

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredHigh

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

Exploit Intelligence

1.17%probability of exploitation in 30 days

64thpercentile

Moderate risk: more likely to be exploited than 64% of all known CVEs.

References

Patch1

github.com

Vendor Advisory1

github.com

Mailing List2

Release Notes1

matrix-org.github.io

Other references2

Related Vulnerabilities

Other CWE-770 (Allocation of Resources Without Limits or Throttling) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-50387	High	7.5	100%	-	Fix
CVE-2019-11478	Medium	5.3	95%	-	Fix
CVE-2019-11479	High	7.5	92%	-	Fix
CVE-2024-27316	High	7.5	91%	-	Fix
CVE-2022-30522	High	7.5	90%	-	Fix
CVE-2019-9515	High	7.5	88%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.