Is CVE-2023-23759 in the CISA KEV catalog?

No. CVE-2023-23759 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-23759?

CVE-2023-23759 has a CVSS v3 base score of 7.5 (HIGH).

What is the EPSS score for CVE-2023-23759?

CVE-2023-23759 has an EPSS score of 0.72% (50th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-23759?

Upgrade fizz to 2023.01.30.00 or later.

CVE & CISA-KEV Catalog

CVE-2023-23759

HIGH

7.5

CVSS v3

NVD

Description

There is a vulnerability in the fizz library prior to v2023.01.30.00 where a CHECK failure can be triggered remotely. This behavior requires the client supported cipher advertisement changing between the original ClientHello and the second ClientHello, crashing the process (impact is limited to denial of service).

CWE-617

How to fix

Remediation Available

fizzNVD

Affected:< 2023.01.30.00Fixed in:2023.01.30.00CVE-2023-23759derived from NVD

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 RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.72%probability of exploitation in 30 days

50thpercentile

Moderate risk: more likely to be exploited than 50% of all known CVEs.

References

Patch2

Related Vulnerabilities

Other CWE-617 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-8617	High	7.5	93%	-	Fix
CVE-2020-36222	High	7.5	78%	-	Fix
CVE-2006-5779	High	7.5	75%	-	Fix
CVE-2021-27212	High	7.5	64%	-	Fix
CVE-2018-5740	High	7.5	59%	-	Fix
CVE-2023-28425	Medium	5.5	55%	-	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 2025-01-21.