Is CVE-2022-23959 in the CISA KEV catalog?

No. CVE-2022-23959 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-23959?

CVE-2022-23959 has a CVSS v3 base score of 9.1 (CRITICAL).

What is the EPSS score for CVE-2022-23959?

CVE-2022-23959 has an EPSS score of 1.96% (78th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-23959?

Upgrade varnish on debian 11 to 6.5.1-1+deb11u2 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2022-23959

CRITICALEPSS 78th pctl

9.1

CVSS v3

NVD

Description

In Varnish Cache before 6.6.2 and 7.x before 7.0.2, Varnish Cache 6.0 LTS before 6.0.10, and and Varnish Enterprise (Cache Plus) 4.1.x before 4.1.11r6 and 6.0.x before 6.0.9r4, request smuggling can occur for HTTP/1 connections.

CWE-444

How to fix

Remediation Available

varnishDebian

Fixed in:6.5.1-1+deb11u2CVE-2022-23959

Fixed in:7.1.0-5CVE-2022-23959

libvarnishapi1Ubuntu

Fixed in:5.2.1-1ubuntu0.1USN-5474-1

libvarnishapi2Ubuntu

Fixed in:6.2.1-2ubuntu0.1USN-5474-1

Fixed in:6.6.1-1ubuntu0.2USN-5474-1

varnishUbuntu

Fixed in:5.2.1-1ubuntu0.1USN-5474-1

Fixed in:6.2.1-2ubuntu0.1USN-5474-1

Fixed in:6.6.1-1ubuntu0.2USN-5474-1

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

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

1.96%probability of exploitation in 30 days

78thpercentile

Elevated risk: more likely to be exploited than 78% of all known CVEs.

References

Vendor Advisory2

Third-Party Advisory2

Other references1

lists.fedoraproject.org

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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.